Yintoni iSilicon Anodes?

I-Silicon anodes ngamalungu ebhetri apho isilicon ithatha indawo okanye yongeza igraphite yemveli njengeyona nto iphambili yokugcina ii-ion zelithium kwiibhetri ze-lithium{0}}. I-Silicon inikezela ngomthamo wethiyori malunga ne-3,600 ukuya kwi-4,200 mAh/g{6}}kakuhle ngamaxesha ali-10 aphezulu kune-graphite's 372 mAh/g. Oku kwenza isilicon ibe yenye yezona zinto zithembisayo kwisizukulwana esilandelayo{10}}ebhetri esinika amandla izithuthi zombane, ii-smartphones, kunye neenkqubo zokugcina amandla.

Ukutyhala ukuya kwi-silicon kuvela kuthintelo olusisiseko kwitekhnoloji yebhetri yangoku. I-Graphite anode ifikelele kwisilingi yomthamo wethiyori, idala umqobo wezicelo ezifuna ukuxinana kwamandla aphezulu kunye noluhlu olude.

I-Silicon ilungisa oku ngendlela yayo yokugcina i-lithium. I-athomu nganye ye-silicon inokubambisana ukuya kuthi ga kwi-3.75 i-athomu ye-lithium (ukwenza i-Li₃.₇₅Si), xa kuthelekiswa negraphite apho enye i-athomu ye-lithium idinga ii-athom ze-carbon ezintandathu (LiC₆). Eli nqanaba leatom{4}}lokusebenza kakuhle liguqulela ngokuthe ngqo kwiibhetri ezigcina amandla amaninzi kumthamo omnye.

Iimpembelelo zorhwebo zininzi. Kwizithuthi zombane, i-silicon anode inokwenza iimayile ezingama-500 ngaphandle kokunyusa ubungakanani bebhetri. Kubathengi be-elektroniki, abavelisi banokuvelisa izixhobo ezincinci ezinobomi obude bebhetri. Uqikelelo lwemakethi lubonisa oku nokwenzeka: imakethi ye-silicon ye-anode ye-anode yehlabathi ifikelele malunga ne-827 yezigidi zeedola ngo-2024 kwaye kuqikelelwa ukuba iza kukhula iye kuthi ga kwi-19.6 yeebhiliyoni zeedola ngo-2033, imele isantya sokukhula sonyaka esiyi-42.1%.

Umthamo ophakamileyo weSilicon uza nengxaki yobunjineli ebalulekileyo: ukwanda komthamo ogqithisileyo ngexesha lemijikelo yokutshaja. Xa i-lithium ion ifaka kwi-silicon ngexesha lokutshaja (inkqubo ebizwa ngokuba yi-lithiation), i-silicon iyanda malunga ne-300-400% yomthamo wayo wokuqala. Ngokuthelekisa, igraphite yanda kuphela malunga ne-10%.

Olu lwando lukhulu ludala uthotho lweengxaki. Uxinzelelo lomatshini lubangela ukuba amaqhekeza e-silicon aqhekeze kwaye acole, aphule unxibelelwano lombane phakathi kwezinto ezisebenzayo kunye nomqokeleli wangoku. Umjikelo ngamnye -wokukhupha uvelisa iintanda ezintsha, ngokuthe ngcembe ukwahlula amasuntswana e-silicon angaphezulu kumjikelo wombane. Iiprototypes ze-silicon anode zakwangoko zaphulukana nobuninzi bazo kwimijikelo nje yentlawulo ye-10, zibenza ukuba bangabi nakuthengiseka.

Ukwandiswa kwakhona kuphazamisa i-electrolyte interphase eqinileyo (SEI){0}}umaleko okhuselayo owenza kumphezulu we-anode. Kwiibhetri eziqhelekileyo zegraphite, i-SEI izinzile emva kwemijikelo embalwa yokuqala. Nge-silicon, ukwandiswa okuphindaphindiweyo kunye nokuphambana ngokuqhubekayo kuphuka kunye nokuguqulwa kwe-SEI, kudla i-lithium ion kunye ne-electrolyte ngomjikelezo ngamnye. Uphando olusebenzisa uhlalutyo lwe-X- lokusasazwa kwereyi lufumanise ukuba malunga ne-35% yeekhabhoni ezibunjwe kwi-SEI enyibilikayo ngexesha lesigaba sokuchithwa, ngelixa i-17% ye-lithium ibanjiswa ngokusisigxina kumasuntswana e-silicon emva komjikelo wokuqala kuphela.

Ingxaki yokwandisa umthamo ilawule uphando lwe-silicon anode ngaphezulu kweminyaka engamashumi amabini. Ngaphandle kwezicwangciso ezisebenzayo zokunciphisa, iinzuzo zethiyori ye-silicon zihlala zingafikeleleki kwizicelo zorhwebo.

Abaphandi kunye neenkampani baphuhlise iindlela ezininzi zokulawula ukwanda kwevolumu, nganye inorhwebo olwahlukileyo{0}}phakathi kokusebenza, ixabiso, kunye nobunzima bokwenza.

Ukunciphisa ubungakanani be-silicon kwi-nanoscale kudala indawo ephezulu kunye neendlela ezimfutshane zokusasazwa kwee-ion ze-lithium. I-Silicon nanoparticles (ngokuqhelekileyo i-10-100 nanometers) ivumela ukwanda ngokufanelekileyo kune-silicon enkulu kuba ubunzima busasaza ngokulinganayo kwimithamo emincinci.

I-Silicon nanowires imele indlela enye ye-nanostructure eyimpumelelo. I-Amprius Technologies yaba nguvulindlela i-100% ye-silicon nanowire anodes ekhula ngokuthe ngqo kumqokeleli wangoku. Olu lwakhiwo luvumela i-nanowire nganye ukuba ikhulise i-radially ngaphandle kokuphazamisana nabamelwane, igcine uqhagamshelwano lombane kulo lonke uhambo lokuhamba ngebhayisikili. U-Amprius unike ingxelo yoxinano lwamandla e-435 Wh/kg kwiqonga labo le-SiCore, liphezulu kakhulu kuneebhetri eziqhelekileyo zegraphite kwi-250-280 Wh/kg.

Umceli mngeni we-nanostructuring ulele kwisikali sokuvelisa kunye neendleko. Ukudala i-nanostructures efanayo kufuna iinkqubo ezinobunkunkqele ezandisa iindleko zokuvelisa ngokuphawulekayo xa kuthelekiswa nokulungiswa kwegraphite eqhelekileyo.

Ukudibanisa i-silicon kunye nezixhobo zekhabhoni kubonisa eyona ndlela yorhwebo ngoku. I-carbon matrix ibonelela ngenkxaso yomatshini, igcina ukuhanjiswa kombane, kwaye idala izithuba ezingenanto ezivumela ukwandiswa kwesilicon.

I-Group14 Technologies iphuhlise isilicon -ikhabhoni ehlanganisiweyo ebizwa ngokuba yi-SCC55 kusetyenziswa ulwakhiwo lwesikafula sobumnini. Amasuntswana ekhabhoni amdaka ahlala e-silicon ngaphakathi kweendawo zawo zangaphakathi, ebonelela ngegumbi lokwandisa ngelixa egcina ingqibelelo yesakhiwo. Esi sixhobo senza ukuya kuthi ga kwi-50% yoxinano lwamandla aphezulu xa kuthelekiswa ne-graphite anode ecocekileyo kwaye iphumelele i-80% umthamo wentlawulo phantsi kwemizuzu emi-5 ngexesha lovavanyo. Ngasekupheleni kuka-2024, ngaphezulu kwesigidi esinye see-smartphones ezisebenzisa itekhnoloji yeQela le-14 zazingene kwintengiso ngokusebenzisana nabavelisi abafana noHlonipheko.

Isilicon-ukuya{1}kumlinganiselo wekhabhoni inefuthe elibukhali ekusebenzeni. Umxholo we-silicon esezantsi (i-5-15% ngobunzima) inciphisa imiba yokwandisa kodwa ibonelela ngokuphuculwa komthamo othobekileyo. Umxholo we-silicon ophezulu (30-50%) uhambisa ubuninzi bamandla obungcono kodwa ufuna ubunjineli obunobuchwephesha bokulawula uxinzelelo lomatshini. Iimveliso zangoku zorhwebo ngokuqhelekileyo zisebenzisa i-silicon ye-10-20% ngobunzima, ukulinganisa ukuzuza kokusebenza ngokuchasene neemfuno zomjikelo wobomi.

Iingubo ezikhuselayo zenza i-buffer phakathi kwamasuntswana e-silicon kunye ne-electrolyte, ukuzinzisa umaleko we-SEI kunye nokunciphisa amandla okukhanya. Iingubo zekhabhoni zezona zixhaphakileyo, kodwa ii-oxide zentsimbi, iipholima, kunye negraphene nazo zibonisa isithembiso.

Abaphandi kwiYunivesithi yaseStanford babonise i-silicon microparticles efakwe kumaqokobhe egraphene agcina ukwaphuka kunye nokugcina imfezeko yesakhiwo ngexesha lokuhamba ngebhayisikile. Igraphene ibonelela ngokuqiniswa komatshini kunye ne-interface ye-SEI ezinzileyo. La masuntswana aphumelele amandla kufutshane ne-3,300 mAh / g kunye nobomi obuphuculweyo bomjikelo xa kuthelekiswa ne-silicon engenanto.

I-Sila Nanotechnologies isebenzisa indlela eyahlukileyo yokudibanisa kunye ne-silicon nanoparticles egcinwe ngaphakathi kwe-carbon scaffold ene-porous. Uyilo lwesikafula luvumela i-silicon ukuba yande kwinqanaba lamasuntswana ngelixa ikhusela i-electrode{1}}inqanaba lokudumba. Imveliso yokuqala yentengiso kaSila yasungulwa kwi-Whoop 4.0 fitness tracker ngo-2021, kwaye inkampani ibambisene neMercedes{5}}Benz ukudibanisa ubuchwepheshe bayo kwiG{6}}Class SUV ngo-2026.

Ukuguqula ikhemistri ye-electrolyte inika enye indlela yokuphucula ukusebenza kwe-silicon anode ngaphandle kokutshintsha ubume bezinto ezisebenzayo. Izongezo ezifana ne-fluoroethylene carbonate (FEC) kunye ne-vinylene carbonate zinceda ukwenza iileya ze-SEI ezizinzileyo ezivumela ngcono utshintsho lwevolumu.

I-Lithium difluoro(bisoxalato) phosphate (LiDFBOP) ibonise isithembiso esithile. Uphando lufumene ukuba i-2% ye-LiDFBOP yongezelela idala umaleko we-SEI oguquguqukayo kunye nonyamezelo oluphuculweyo lokwandiswa kwe-silicon. I-SEI elungisiweyo iququzelela ukuthuthwa kwe-lithium ion efanayo, ukunciphisa uxinzelelo lwangaphakathi kunye nokugcina ingqibelelo ye-particle ngokusebenzisa ibhayisikili.

Silicon Anodes

I-silicon anode yorhwebo kunye nophuhliso iwela kwiindidi ezininzi ezisekwe kumxholo wesilicon kunye nendlela yolwakhiwo.

Phantsi-I-Silicon Anode (5-15% yesilicon):Le mixube imele ukuphunyezwa kwe-silicon yokuqala yorhwebo. Ukongeza amanani amancinci e-silicon kwi-graphite anode ibonelela nge-10-20% yokuphucula umthamo kunye nokuphazamiseka okuncinci kwiinkqubo ezikhoyo zokuvelisa. Abavelisi abakhulu bebhetri kubandakanya iPanasonic kunye ne-LG bafake imixube ephantsi-silicon kwezinye iibhetri zemoto yombane. I-Tesla iqinisekisile kwi-2015 ukuba iibhetri ze-Model S zinezongezo ze-silicon ezandisa uluhlu malunga ne-6%.

Phakathi -I-Silicon Anodes (20-50% yesilicon):Olu didi lujolise kwiinzuzo zokusebenza ezibalulekileyo ngelixa ligcina ubomi bomjikelo obufanelekileyo. Iinkampani ezifana ne-Enevate kunye ne-NanoGraf zijolise kolu luhlu, zisebenzisa iindlela ezahlukeneyo ze-nanostructuring kunye ne-composite. I-NanoGraf's silicon alloy architecture izinzisa iintsimbi ngexesha lokutshaja nokukhupha, ivumela awona mandla ehlabathi{2}}axineneyo ngo-18650 iiseli ze-ion zelithium{4}}.

High-Silicon Anodes (>70% yesilicon):Olu yilo lubeka phambili uxinaniso lwamandla oluphezulu kwizicelo apho ubunzima kunye nomthamo ziyimiqobo ebalulekileyo-i-aerospace, ukhuselo, kunye{1}}nokusebenza okuphezulu kombane wabathengi. U-Amprius no-Enovix bakhokela kolu didi. Ulwakhiwo lweeseli ze-Enovix's 3D ezinomxholo ophezulu-we-silicon uzuze uxinaniso lwamandla omthamo odlula i-900 Wh/L kuyilo lweeseli zabo ze-EX-1M.

ISilicon -Eyona iNqabileyo eZinzileyo{1}}Ii-Anodes zesimo:Udidi oluvelayo ludibanisa i-silicon anodes kunye ne-electrolyte eqinileyo endaweni ye-electrolyte engamanzi. Indlela eqinileyo-karhulumente isusa imiba emininzi yokuhambelana kwe-electrolyte ethintele uphuhliso lwe-silicon anode. Intsebenziswano ka-2021 phakathi kwe-UC San Diego kunye ne-LG Energy Solutions ibonise i-silicon anode eqinile{4}}iibhetri zelizwe ezine-99.9% ye-silicon ngokobunzima, igcina ngaphezulu kwe-80% umthamo emva kwemijikelo engama-500. I-sulfide eyomeleleyo ye-electrolyte yenza ujongano oluzinzileyo- lwenqwelomoya enesilicon evumela ngcono ukwandiswa kwevolumu kunee-electrolyte ezingamanzi.

Itekhnoloji ye-Silicon anode itshintshile ukusuka kuphando lwebhubhoratri ukuya kwimveliso yorhwebo kuyo yonke i-2024-2025, kunye neenkampani ezininzi ezifikelela kwisikali sokwenza.

Umthamo wemveliso yehlabathi jikelele yesilicon -equlathe izinto ze-anode idlule kwiiyure ezingama-500 zegigawathi{2}}iyure ekupheleni kuka-2024, imele ukunyuka kwe-234% ukusuka ku-2023.

I-Sila Nanotechnologies yakha indawo ye-20 GWh e-Moses Lake, eWashington, ekulindeleke ukuba ivelise impahla ye-anode eyaneleyo ye-1 yezigidi zezithuthi zombane ngonyaka xa zisebenza ngokupheleleyo. Le nkampani ngoku isebenza kwindawo yokulinga e-Alameda, eKhalifoniya, kwaye ikhusele intsebenziswano kunye neenjini ezinkulu eziquka iMercedes{3}}iBenz kunye neBMW.

I-Group14 Technologies isebenza kwiziko le-10 GWh eMzantsi Korea ngokusebenzisa intsebenziswano kunye ne-SK Materials, kunye nemveliso eqala ekupheleni kwe-2024. Inkampani yesibini ye-US factory (BAM-2) e-Moses Lake, eWashington, iya kongeza i-20 GWh umthamo. IGroup14 inike ingxelo yokuhambisa imathiriyeli ye-SCC55 ngaphezulu kwe-100 EV kunye nabavelisi beebhetri kwihlabathi liphela ngoSeptemba ka-2024.

I-Amprius Technologies ikhulise indawo yayo yaseFremont, eCalifornia ukusuka kwikilowatt-iyure ukuya kwi-megawatt{1}}umthamo weyure ngo-2023. Inkampani ikhusele ngaphezulu kwe-20 yezigidi zeedola kwiikhontrakthi zeeseli zayo zokusebenza ze-40Ah eziphezulu{5}}, kunye nokuthunyelwa kwempahla kuqala ngo-2024.

Ii-automakers ezinkulu zizibophelele kwitekhnoloji ye-silicon anode kwiimodeli ezizayo zemoto yombane. I-General Motors isebenzisana ne-OneD Battery Sciences ukudibanisa i-silicon nanowires kwiiseli zebhetri ze-Ultium zeGM. Indlela ye-OneD ifaka i-silicon nanowires kumgubo wegraphite, ijolise kwi-350 Wh/kg uxinano lwamandla kunye ne-80% yokutshaja ngaphantsi kwemizuzu eli-10 ngexabiso elongezelelweyo elingaphantsi kwe-$2 ngekilowatt{6}} ngeyure.

I-Porsche ityale imali kwi-Group14 Technologies kunye nezicwangciso zokubandakanya i-silicon-i-carbon anodes kwiimoto zombane eziqala ngo-2025. Ubambiswano lujolise ekuboneleleni iibhetri ubuncinane ze-EVs ze-600,000 ngonyaka xa imveliso epheleleyo iqala.

I-Mercedes{{0}i-Benz ibhengeze ukudityaniswa kwe-Sila Nanotechnologies ye-silicon anode imathiriyeli kwi-G-Iklasi ye-SUV ngo-2026, iqikelela i-10-15% yokuphucula umthamo webhetri. Oku kulandela isibhengezo sikaBMW kwangaphambili sezicwangciso ezifanayo.

Ngo-Okthobha ka-2024, iQela le-POSCO lagqiba isityalo se-silicon anode e-Pohang, eMzantsi Korea, ene-550-toni yonyaka eyaneleyo yokuxhasa izithuthi zombane ezingama-275,000. Eli ziko limele inkqubo ye-POSCO epheleleyo yokuvelisa i-silicon anode, ukusuka kwimathiriyeli eyandulelayo ngemveliso edibeneyo yokugqibela.

Ii-elektroniki zabathengi zibonelele nge-silicon anode itekhnoloji yokuqala ebalulekileyo yokungena kwimarike ngenxa yobungakanani beebhetri ezincinci kunye nokunyamezela amaxabiso eprimiyamu. I-Whoop 4.0 fitness tracker, eyasungulwa ngoSeptemba ka-2021, yaba yeyona mveliso inkulu-yentengiso kusetyenziswa imathiriyeli ye-silicon ye-Sila, ebonisa i-20% yokwandisa ubomi bebhetri ngendlela efanayo.

I-smartphone ye-Honor's Magic7 Pro, ekhutshwe ngasekupheleni kuka-2024, ine-silicon{2}ibhetri yekhabhoni esebenzisa i-Group14's SCC55 imathiriyeli enomthamo ukuya kuthi ga kwi-5,850 mAh{7}}iphezulu kakhulu kunezixhobo ezinokuthelekiswa zisebenzisa i-anode eqhelekileyo.

NgoMeyi ka-2025, i-TDK Corporation yabhengeza ukukhawulezisa{1}}kwesizukulwana esilandelayo se-silicon anode ibhetri yokuqalisa ijolise{2}}kumacandelo okusebenza kwe-smartphone. Inkampani ijolise ekudibaniseni itekhnoloji ye-silicon anode kwizixhobo zeflegi kuyo yonke i-2025-2026.

Okwenyani-ukusebenza kwesilicon anode yehlabathi kubonisa zombini iingenelo ezibalulekileyo kunye nezithintelo eziseleyo xa kuthelekiswa nesiseko segraphite.

Iimveliso ze-silicon ye-anode yorhwebo zibonisa i-20-50% yokuphuculwa koxinano lwamandla kwinqanaba leseli, nangona oku kusilela kuncedo lwe-silicon lwethiyori ye-10x ngenxa yokuthomalalisa ubunjineli obuyimfuneko. Iqonga le-SiCore le-Amprius lifezekisa uxinano lwamandla egravimetric angama-360-435 Wh/kg ngokuxhomekeke kubumbeko, xa kuthelekiswa ne-250-280 Wh/kg yeeseli zegraphite eziphambili. Ukuphuculwa koxinano lwamandla omthamo ukusuka kwi-30-50%, okwenza ukuba iipakethi zebhetri ezihlangeneyo zibe namandla alinganayo.

I-Silicon anode ibonisa iimpawu zokutshaja ezithembisayo-ezikhawulezayo. Iimathiriyeli ze-SCC55 zeQela le-14 zizuze i-80% yemeko yentlawulo phantsi kwemizuzu emi-5 ngexesha lovavanyo kunye nabavelisi beebhetri. Isilicon ye-Enevate{7}}ezona bhetri zibonise ukutshaja kwe-80% kwimizuzu emalunga ne-10 kwiibhayisekile zombane ze-Lightning Motorcycles, ibonelela malunga neekhilomitha ezingama-220 zoluhlu.

Ukutshaja okuphuculweyo kuvela kwi-silicon ephezulu ye-lithium diffusion coefficient kunye ne-nanostructured architectures enciphisa umgama wokusasazwa. Nangona kunjalo, ukutshaja ngokukhawuleza kwandisa imiba yokwandisa umthamo, kufuna ukulungelelaniswa ngononophelo phakathi kwezinga lokutshaja kunye nobomi bomjikelezo.

Ubomi bomjikelo buhlala bungumda ophambili we-silicon anodes. Ngelixa iibhetri zegraphite zihlala zifezekisa imijikelo ye-1,000-3,000 ngaphambi kokufikelela kwi-80% yokugcina umthamo, iibhetri ze-silicon anode zibonisa imijikelo ye-300-1,000 ngokuxhomekeke kumxholo we-silicon kunye neemeko zokusebenza.

Umxholo we-silicon ophezulu ngokubanzi uhambelana nobomi obuncitshisiweyo bomjikelezo. Amaxwebhu e-Amprius abonisa ukuba iibhetri zayo zifikelela kwimijikelo engama-300 kubunzulu obupheleleyo bokukhutshwa, kodwa ubomi bomjikelezo buphucula kakhulu kubunzulu bokukhutshwa. Ukusebenza kwi-30% ubunzulu bokukhutshwa kunokuba i-100% inokwandisa ubomi bomjikelezo ngamakhulu aliqela imijikelo.

Ubuzaza bobushushu bukwachaphazela ubomi bomjikelo. I-Silicon anodes iqhuba kakubi ngaphantsi kwe-0℃kwaye ithobe ngokukhawuleza ngaphezu kwe-45℃xa kuthelekiswa negraphite. Ukuguga kweKhalenda{4}}ilahleko yesakhono ngexesha logcino{5}}iqhubela phambili ngokukhawuleza kwiibhetri ze-silicon anode, nangona ukwenziwa kwamva nje kuphucuke kakhulu. Uphando lweLebhu yeSizwe yaseArgonne yafumanisa ukuba ubomi bekhalenda ye-silicon anode yebhetri buphuculwe ukusuka malunga nonyaka omnye kwiminyaka emihlanu eyadlulayo ukuya kuqikelelo lweminyaka emi-5 ukuya kweli-10 ngetekhnoloji yangoku.

Uxinaniso lwamandla oluphezulu lugxininisa ngokwendalo amandla amaninzi kumthamo onikiweyo, okunokwenzeka konyuse ubukhali bokubaleka kwe-thermal. Uvavanyo lobuchwephesha lobuchwephesha bobunjineli lufumanise ukuba njengoko umthamo weseli ye-silicon anode unyuka, kunjalo ke nobukhali besiganeko sokubaleka kwe-thermal ngenxa yomxholo wamandla aphezulu. Oku kwenza kube nzima uyilo lwepakethi yebhetri, ifuna ulawulo olomeleleyo lwe-thermal kunye neenkqubo zokuqulatha.

Indlela eqinileyo-yesimo sesilicon anode inokubonelela ngokhuseleko. I-electrolyte eqinile isusa i-electrolyte yolwelo olunokutsha, inciphisa kakhulu ingozi yomlilo. Nangona kunjalo,{3}itekhnoloji yombuso eqinileyo ijongene nemveliso yayo kunye nemingeni yeendleko ezibambezele urhwebo olubanzi.

Silicon Anodes

Iindleko kunye nomgangatho wokuvelisa umisela ukusebenza kwetekhnoloji ye-silicon anode njengokusebenza kobugcisa.

I-silicon ngokwayo ininzi kwaye ayibizi{0}}yeyesibini eyona nto ixhaphakileyo kumhlaba. Nangona kunjalo, ukusetyenzwa kwesilicon kwibhetri{2}}yemathiriyeli yodidi ngokusulungeka okufanelekileyo, ubungakanani bamasuntswana, kunye nolwakhiwo longeza ixabiso elibalulekileyo. Izinto zangoku ze-silicon anode zibiza malunga ne-$ 20-50 ngekhilogram nganye xa kuthelekiswa ne-$ 10-15 ngekhilogram yegraphite.

Le premium yeendleko iyancipha kwinqanaba leseli. Kuba isilicon ibonelela ngomthamo ophezulu ngegram, izinto ezincinci ziyafuneka kugcino olulinganayo lwamandla. Iinkampani ezifana neNzululwazi yeBattery ye-OneD zenza i-silicon nanowire yazo idityaniswe namaxabiso angaphantsi kwe- $2 ngekilowatt-ngeyure nganye kwinqanaba leseli{4}}unyuso olungephi kwindleko yebhetri lilonke.

Iindleko zokwenziwa kwemveliso ziyohluka kakhulu ngokwenkqubo. Iisilicon nanowires zifuna ukubekwa komphunga okukhethekileyo okanye iinkqubo zokukhula kwekhemikhali eziyinkunzi{1}}enzulu. I-silicon -I-carbon composites ezisebenzisa ukuxubana okuqhelekileyo kunye nezixhobo zokugquma zingasebenzisa iziseko zokwenziwa kweebhetri ezikhoyo, ukunciphisa iimfuno zenkunzi kunye nokukhawulezisa urhwebo.

Ukuhambelana ne-lithium esele ikhona{0}}imigca yokwenziwa kwebhetri yeion kunefuthe elibi kumaxesha okwenziwa korhwebo. Iindlela ezifuna izixhobo ezitsha zemveliso zijongene nemijikelo yophuhliso olude kunye neendleko eziphezulu zenkunzi.

Imidibaniso yomxholo wesilicon esezantsi{0}ukuya{1}phakathi ephakathi yehlela kwiinkqubo ezikhoyo zokwenziwa nohlengahlengiso olungephi. Abavelisi bebhetri banokufaka endaweni yesilicon{3}umxube wekhabhoni kwigraphite esulungekileyo besebenzisa izinto ezikhoyo zokwaleka, ikhalenda, kunye nezixhobo zokudityaniswa kweeseli. Oku kuhambelana kuchaza ukuba kutheni isilicon {{5}ikhopowusi zekhabhoni ene-10-30% yesiqulatho sesilicon ifikelela kwimarike ngokukhawuleza kune-silicon ephezulu okanye indlela yesilicon esulungekileyo.

I-silicon ecocekileyo anode kunye nolwakhiwo oluphambili lufuna izixhobo ezikhethekileyo. Inkqubo yokukhula kwe-nanowire ka-Amprius isebenzisa imigca yemveliso yobunini engahambelaniyo nomgangatho wokwenziwa kwe-lithium{1}} Ngelixa oku kudala imiqobo ekhuphisanayo, kukwanciphisa amathuba entsebenziswano kunye nabavelisi bebhetri abasekiweyo kwaye kuyacotha ukukala.

Ikhonkco lonikezelo lwe-silicon anode liyavela kodwa lihlala lincinci kunemixokelelwane yokubonelela nge-graphite anode. Uninzi lwezixhobo ze-silicon anode okwangoku zivela kwiinkampani ezikhethekileyo zokuqalisa endaweni yokuba ngababoneleli bezinto ezisekiweyo. Njengoko imfuno ikhula, iinkampani zekhemikhali zemveli kunye nezixhobo zingena emarikeni.

I-Metallurgical-i-silicon yebakala{1}eveliswe ngobuninzi be-semiconductor kunye nemizi-mveliso yelanga{2}}ibonelela nge-{3}}indleko ephantsi yesondlo sokutya. I-Coreshell, isiqalo se-Bay Area, iphumelele ibhaso lesigidi seedola kwi-2024 Qala{7}}iNdebe yeHlabathi ePhakamileyo ngokuphuhlisa i-metallurgical silicon anodes kwizithuthi zombane, ngokukodwa ukujongana nemiqobo yeendleko. Indlela yabo isebenzisa i-silicon yesinyithi efunyenwe ekhaya kwintengiso-yenqanaba le-60 yeeseli ze-Ah, ezinokuthi zinciphise ukuxhomekeka kwimixokelelwane yokubonelela ngesilicon esulungekileyo.

Ukuqonda ukuba kutheni i-silicon anode imele ukuqhubela phambili okubaluleke kangaka, kufuneka siphendule kuqala:yintoni ibhetri ye-lithium ioniteknoloji kwaye isebenza njani? Ukuqonda i-silicon anodes kufuna umxholo malunga nendlela iibhetri ze-ion ze-lithium ezisebenza ngayo kwinqanaba elisisiseko.

Iibhetri zeLithium -zigcina kwaye zikhupha amandla ngotshintsho lwekhemikhali. Ngexesha lokukhutshwa, i-lithium ion iphuma kwi-anode nge-electrolyte ukuya kwi-cathode, ngelixa ii-electron zihamba ngesekethe yangaphandle ukuya kwizixhobo zamandla. Ngexesha lokutshaja, inkqubo ibuyela umva: umbane uqhuba i-lithium ion ukubuyisela kwi-anode apho zigcinwe khona.

Umsebenzi we-anode ubamba i-ion ze-lithium ngexesha lokutshaja kunye nokukhulula ngexesha lokukhutshwa. Igraphite iphumeza oku ngonxibelelwano{1}}lithium ion ukutyibilika phakathi kweeleya zegraphene kwisakhiwo sekristale yegraphite. Lo matshini unciphisa umthamo ngenxa yokuba ulwakhiwo olumaleko lwegraphite lunokwamkela iathom ye-lithium enye kwiiathom zekhabhoni ezintandathu.

I-silicon igcina i-lithium ngokusebenzisa i-alloying kunokuba i-intercalation. Ibhondi yeeathom zeLithium ngokuthe ngqo kunye neeathom zesilicon, zenza i-lithium{1}}i-silicon alloys (i-LixSi apho i-x isuka ku-0 ukuya kwi-3.75). Le ndlela yokudibanisa ivumela ukugcinwa kwe-lithium ephezulu kakhulu kwiyunithi yobunzima, ichaza amandla aphezulu e-silicon.

I-anode isebenza kunye namanye amacandelo ebhetri kwinkqubo elungelelanisiweyo. I-cathode{1}}ngokuqhelekileyo i-lithium metal oxide efana ne-lithium nickel manganese cobalt oxide (NMC){2}}ibonelela ngee-ion ze-lithium kwaye yamkele ii-electron ngexesha lokukhupha. I-electrolyte iqhuba i-lithium ion kodwa ingabi yi-electron, igcina ukuhlukana kwentlawulo. Isahluli esinemingxuma ngokwasemzimbeni sahlula i-anode kunye ne-cathode ngelixa sivumela ukuthuthwa kwe-ionic.

I-Silicon anodes kufuneka idibanise kule nkqubo ngaphandle kokuphazamisa imisebenzi yamanye amacandelo. Ingxaki yokwandisa umthamo iba ngumngeni ngakumbi kuba ichaphazela yonke indibano ye-electrode, hayi nje amasuntswana e-silicon. Ukwandiswa kuphazamisa isakhiwo se-porous esenza ukuba kungene i-electrolyte, ukutyumza izongezelelo zekhabhoni ezibonelela nge-conductivity, kunye nokuhlutha isibophelelo se-polymer esigcina yonke into kunye.

Silicon Anodes

Itekhnoloji yeSilicon anode iyaqhubeka nokuvela ngokukhawuleza, kunye neendlela ezininzi zophuhliso ezibonisa isithembiso sokuphuculwa kwesizukulwana esilandelayo.

Iimveliso zorhwebo zangoku zisebenzisa i-10-30% ye-silicon ngokobunzima, ishiya indawo enkulu yokuphucula. Uphando lujolise ekwenzeni i-50-80% umxholo we-silicon ngelixa ugcina ubomi bomjikelo owamkelekileyo. Impumelelo inokusondeza ukusebenza kwenqanaba leseli kufutshane neenzuzo zethiyori ye-silicon.

Indlela eya kumxholo we-silicon ephezulu ixhomekeke kwinkqubela phambili eqhubekayo kwi-nanostructuring, uyilo oluhlanganisiweyo, kunye nekhemistri ye-electrolyte. Abanye abaphandi balandela izakhiwo zehierarchical ezidibanisa izikali zobude ezininzi -i-silicon nanoparticles efakwe kwi-microscale carbon structures, umzekelo{2}}ukusasaza ngcono uxinzelelo kumatshini.

I-Silicon anodes idla i-lithium ebalulekileyo ngexesha lokwenziwa kwe-SEI yokuqala, yehlisa ukusebenza kakuhle komjikelo wokuqala ukuya kuma-70-85% xa kuthelekiswa ne-90-95% yegraphite. Le lahleko yesakhono engenakulungiseka ilahla i-lithium esuka kwi-cathode, inciphisa ubuninzi bamandla ebhetri.

I-prelithiation ibuyekeza ngokongeza i-lithium eyongezelelweyo kwi-anode phambi kokudityaniswa kweeseli, ukuphelisa kuqala{0}}ilahleko yomjikelo. Ubuchwephesha bubandakanya i-lithium metal coating ngokuthe ngqo, i-lithiation yeekhemikhali isebenzisa i-organolithium compounds, kunye ne-electrochemical prelithiation. Ngelixa ubuchwephesha buphumelele, iprelithiation yongeza amanyathelo okucubungula kunye neendleko, ukunciphisa ukwamkelwa kwizicelo eziphezulu{3}}zexabiso.

I-polymer binder ephethe izinto ezisebenzayo kumqokeleli wangoku idlala indima engabalulekanga ekusebenzeni kwe-silicon anode. Izibophelelo eziqhelekileyo ze-polyvinylidene fluoride (PVDF) azikwazi ukukhawulelana nokwandiswa kwesilicon, ekhokelela kwi-delamination kunye nokuphelelwa amandla.

Uphando kwizibophelelo ezikhethekileyo luchonge abagqatswa abaninzi abathembisayo. I-Polyacrylic acid (PAA) kunye ne-carboxymethyl cellulose (CMC) zenza iibhondi ezomeleleyo kunye nesilicon kwaye zolule ngempumelelo ngakumbi ngexesha lokwandiswa. Ezinye izibophelelo eziphambili ziquka iimpawu zokuziphilisa-zezibhobho zepolymer ezilungisa iibhondi emva kokuqhawuka, ukugcina imfezeko ye-electrode ngemijikelo emininzi.

Ukudibanisa i-silicon anode kunye-ne-electrolyte eqinileyo yelizwe imele indlela enokubakho yenguqu. Ii-electrolyte eziqinileyo zisusa imiba yokuhambelana kwe-silicon kunye ne-electrolyte engamanzi ngelixa ibonelela ngezinto eziluncedo zokhuseleko. Ibhetri ye-silicon yelizwe -eqinile eboniswe yi-UC San Diego kunye ne-LG Energy Solutions ngo-2021 ibonise ukuba ujongano oluqinileyo lwe-electrolyte luthintela ukwanda kwesilicon kune-electrolyte elulwelo egqobhoza kwiintanda.

Nangona kunjalo, iibhetri eziqinileyo-zijongene nemingeni yazo yorhwebo equka ukuntsokotha kwemveliso, ukumelana nobuso, kunye neendleko zemathiriyeli. I-Silicon anodes inokungena ezomeleleyo{2}}iibhetri zelizwe mva kunenkqubo yesiqhelo yolwelo lwe-electrolyte.

Ukufunda koomatshini kunye nemodeli yokubala kuya kukhawulezisa uphuhliso lwe-silicon anode. Abaphandi basebenzisa izibalo zethiyori ezisebenza ngoxinaniso ukuqikelela ukubunjwa kwe-SEI, ukulinganisa amandla emolekyuli ukulinganisa uxinzelelo kumatshini, kunye ne-algorithms yokufunda koomatshini ukwenza ulungelelwaniso oludibeneyo.

Ezi zixhobo zinciphisa ulingo{0}}kunye{1}}novavanyo lwemposiso ngokuchonga indibaniselwano yemathiriyeli ethembisayo phambi kokudityaniswa. Bakwabonelela ngokuqonda kwiindlela zokungaphumeleli ekunzima ukuziqwalasela ngokuvavanywa, okwenza izisombululo ezijoliswe kuzo.

Zinjani ii-silicon anode xa zithelekiswa negraphite anode ekusebenzeni kokwenyani kwehlabathi?

I-Silicon anodes ihambisa i-20-50% yoxinano lwamandla aphezulu kwiimveliso zorhwebo, nangona oku kusilela kwi-advanteji yethiyori ye-10x ngenxa yorhwebo lobunjineli{4}}olushiyekileyo. Bavumela ukutshaja okukhawulezayo{7}}kaninzi ukufikelela kwi-80% umthamo kwimizuzu emi-5-15-kodwa ngoku banikezela ubomi bomjikelo omfutshane, ngokwesiqhelo 300-1,000 imijikelo xa kuthelekiswa ne-1,000-3,000 yegraphite. Iindleko zihlala ziphezulu, nangona ipremiyamu iyehla njengoko imveliso isonyuka.

Yiyiphi ipesenti ye-silicon esetyenziswa kwiibhetri zorhwebo zangoku?

Uninzi lweebhetri ze-silicon ye-anode ziqulethe i-10-30% ye-silicon ngokobunzima, kunye nentsalela yigraphite kunye nekhabhoni. Igraphite esulungekileyo ihlala ikhonya kwimarike jikelele. Umxholo ophantsi we-silicon ulinganisa ukuphuculwa komsebenzi ngokuchasene nobomi bomjikelezo kunye nemingeni yokuvelisa. Umxholo wesilicon ephezulu (50-100%) ukhona kwiinkqubo ezikhethekileyo ezifana ne-aerospace kodwa awukasebenzi kwiimveliso zentengiso enkulu.

Kutheni i-silicon isanda kakhulu ngexesha lokutshaja?

I-Silicon iyanda ngenxa yokuba ii-athom ze-lithium zidibana ngokuthe ngqo nee-athom ze-silicon kunokuba ifake nje phakathi kwamaleko njengegraphite. Le ndlela yokusabela ibumba i-lithium{1}}ikhompawundi zesilicon (ukuya kuthi ga kwiLi₃.₇₅Si) ezithatha umthamo omninzi kunesilicon esulungekileyo{3}}malunga ne-300-400% yokwandiswa. Ukwandiswa kubuyiselwa umva kodwa kudala uxinzelelo lomatshini olonakalisa isakhiwo se-electrode phezu kwemijikelo ephindaphindiweyo.

Ziya kufumaneka nini iinqwelo zombane ze-silicon anode?

Uninzi lwee-automakers zicwangcisa i-silicon anode EV yokuqalisa phakathi kuka-2025{1}}2027. I-Mercedes-i-Benz ibhengeze ii-SUV ze-G-Class ezine-Sila silicon anode ngo-2026, ngelixa i-GM idibanisa ubuchwepheshe be-OneD kwiibhetri ze-Ultium. IPorsche isebenzisana neGroup14 yokusasazwa kuka-2025. Nangona kunjalo, ezi mveliso zokuqala ziya kusebenzisa umxholo we-silicon ophakathi (mhlawumbi i-15-30%), kunye nokwahluka okuphezulu kwe-silicon okuvela kamva kwishumi leminyaka njengoko itekhnoloji ikhula.

Kwiinkampani kunye nabaphandi abasebenza ngetekhnoloji ye-silicon anode, izinto ezininzi ezisebenzayo zimisela ukuphunyezwa ngempumelelo.

Ubunjineli be-Electrode bufuna ukulungelelanisa iinguqu ezininzi. Ubungakanani besuntswana le-silicon buchaphazela zombini indawo yokuhlala yokwandisa kunye nokuhanjiswa kombane. Iincinci ezincinci (i-nanoscale) zibamba ukwandisa ngcono kodwa zidala indawo engaphezulu yokwakheka kwe-SEI. Ubukhulu be-Electrode buphembelela uxinano lwamandla kunye nomthamo wesantya-ii-electrode ezityebileyo zigcina amandla amaninzi kodwa zinciphisa isantya sokutshaja ngenxa yemigama emide yothutho ye-ion.

Iinkqubo zolawulo lwebhetri zifuna uhlaziyo kwiibhetri ze-silicon anode. Imeko-yo{2}}yoqikelelo lwe-algorithms yoqikelelo lwentlawulo elungelelanisiweyo yegraphite isenokungasebenzi kakuhle ngesilicon ngenxa yeegophe zombane ezahlukeneyo. Iiprothokholi zokutshaja ezenzelwe igraphite zinokukhawulezisa ukuthotywa kweebhetri zesilicon. Ulawulo lwe-Thermal luba lubaluleke ngakumbi xa kunikwa ubuntununtunu bobushushu be-silicon kunye nokuxinana kwamandla aphezulu.

Usetyenziso-ulungiselelo oluthile lumisela umxholo ofanelekileyo wesilicon kunye noyilo lwebhetri. Ii-elektroniki zabathengi zinokunyamezela ubomi bomjikelo obufutshane (iminyaka emi-2-3) ngokutshintshiselana noxinano lwamandla aphezulu kunye nokutshaja ngokukhawuleza. Izithuthi zombane zidinga ubomi bomjikelo obude (iminyaka eyi-8-10) nokuba oko kufuna umxholo ophantsi wesilicon. Ugcino lwegridi lubeka phambili iindleko kunye nobomi bomjikelezo ngaphezulu koxinano lwamandla, okunokuthi kuthintele izibonelelo zesilicon.

Uvavanyo kunye nemigangatho yemfundo yeebhetri ze-silicon anode zisaphuhliswa. Uvavanyo lwebhetri yelithium -yeyon isenokungacinezeli ngokwaneleyo isilicon anode okanye iqikelele yokwenyani{2}}iindlela zokungaphumeleli zehlabathi. Iiprothokholi zovavanyo ezinobunkunkqele ezivavanya iziphumo zokwandiswa kwevolumu, uzinzo lwe-SEI, kunye nobuntununtunu bobushushu kwimijikelo emininzi inceda ukuchonga imiba enokubakho phambi kokuthengiswa.

Oku kubonisa itekhnoloji ephuhlayo apho ezona zenzo zilungileyo ziqhubeka ziphuhla. Abamkeli kwangethuba kufuneka balindele ukucokiswa okuphindaphindiweyo njengoko amava asebenzayo esanda.

I-Silicon anode iphawula inyathelo elibalulekileyo eliya phambili kwitekhnoloji yebhetri, ibonelela ngamandla amakhulu kunye nokuphuculwa kwesantya sokutshaja ngaphezulu kwegraphite eqhelekileyo. Itekhnoloji iye yaqhubela phambili isuka kwilabhoratri yokufuna ukwazi ukuya kwinyani yorhwebo, kunye neenkampani ezininzi ezivelisa izixhobo ze-silicon anode kwinqanaba kunye nabavelisi abakhulu bazidibanisa kwiimveliso.

Ukanti i-silicon anode ayisosisombululo sipheleleyo kuyo yonke imida yebhetri. Ukwandiswa komthamo kusengumngeni ongundoqo ofuna ubunjineli obuchubekileyo bokulawula. Ukuphuculwa kobomi bomjikelo kuyaqhubeka, kodwa iibhetri zesilicon zisabambe igraphite kubomi obude. Izavenge zeendleko ziyaqhubeka, nangona zicutheka njengezikali zemveliso.

Indlela yokwenyani eya phambili ibandakanya ukonyuka komxholo wesilicon ngokuthe ngcembe njengoko izisombululo zikhula. Namhlanje i-10-30% yeebhetri zesilicon imele isigaba sokuqala. Umxholo we-silicon ophezulu uya kuvela kuyo yonke i-2020s kade njenge-nanostructuring, uyilo oludibeneyo, kunye ne-electrolyte chemistry advance. Ekugqibeleni, ii-anode ze-silicon ezikufutshane-ezicocekileyo zinokusebenza kwizicelo ezikhethekileyo, ngelixa umxholo ophakathi we-silicon usebenza kwiimarike eziphambili.

Kwizithuthi zombane, izinto zombane zabathengi, kunye nokugcinwa kwegridi, i-silicon anode ibonelela ngophuculo olunentsingiselo kwiimethrikhi zokusebenza ezibalulekileyo kubasebenzisi bokuphela: uluhlu olude, ukutshaja ngokukhawuleza, kunye nezinto ezincinci zeefom. Elo xabiso lisebenzayo{{1}elingelulo ubuninzi bethiyori{2}}liya kuqhuba ukwamkelwa okuqhubekayo kunye nokucokiswa kobuchwepheshe be-silicon anode.

Yintoni iSilicon Anodes?

Yintoni iSilicon Anodes?

Kutheni iSilicon ibalulekile kwiTekhnoloji yebhetri

Umngeni woKwandiswa koMqulu

Izisombululo zobuNjineli kwiNgxaki yoKwandiswa kweSilicon

Nanostructuring

ISilicon {{0}Izihlanganisela zeCarbon

Iindlela zoKwaleka kunye ne-Ecapsulation

Izongezo ze-Electrolyte

Iintlobo ze-Silicon Anode kunye noLungiselelo

Uphuhliso loRhwebo kunye nokuNgena kweMarike

Ukwandiswa koMsebenzi weMveliso

Izicelo zeemoto

Ukusasazwa koMthengi we-Electronics

Iimpawu zoMsebenzi kunye{0}}noRhwebo

Ukufumana Uxinzelelo lwamandla

UkuTshaja ngokukhawuleza izakhono

Imingeni yoBomi yomjikelo

Iingqwalasela zoKhuseleko

Iingqwalasela zezoQoqosho nezeMveliso

Iindleko zezinto eziphathekayo

Ukuhambelana koMveliso

Uphuhliso lwekhonkco lonikezelo

I-Silicon Anodes kunye neLithium -Iziseko zeBatri ye-Ion

Izalathiso kunye nemingeni eseleyo

Umxholo weSilicon oPhezulu

Iindlela zokuQalisa

Izibophelelo eziPhezulu

Udibaniso oluqinileyo-lweState

Uyilo lweKhompyutha

Imibuzo ebuzwa qho

Iingqwalasela zokuPhunyezwa nokuHlanganisa

Iimveliso ezidumileyo

Thumela u kuphanda