Txoj Kev Txhim Kho Ntawm Cov Roj Roj Uas Muaj Hnub Nyoog Li Cas?

Lub roj teeb khov-khov yog hais txog cov roj teeb uas siv hluav taws xob khov hluav taws xob thiab roj khov kho hluav taws xob. Txawv ntawm cov roj teeb ua kua hluav taws xob, lawv yog ib qho ntawm cov kev qhia tseem ceeb rau kev tsim kho tshiab lub zog hluav taws xob tsheb roj teeb hauv lub neej yav tom ntej. Tsis ntev los no, thaum lub tuam txhab Volkswagen tshaj tawm nws daim ntawv qhia nyiaj txiag thib ob, Volkswagen Pawg Thawj Coj Herbert Diss tau hais tias Volkswagen npaj rau nws tus kheej tsim cov roj teeb khoom khov, thiab kev tsim tawm loj yuav pib xyoo 2024 lossis 2025. Raws li lub teb chaws" Zog- txuag thiab Tshiab Lub Zog Siv Hluav Taws Xob Technology Roadmap", los ntawm 2025, lub zog ntom ntom ntawm cov roj teeb lithium rau cov hluav taws xob ntshiab yog 400Wh / kg, thiab lub hom phiaj hauv 2030 yog 500Wh / kg. Raws li qhov tam sim no siv tam sim no ternary roj teeb muaj kev txhawj xeeb, cov thev naus laus zis muaj nyob rau theem no ua rau nws nyuaj rau kev ua tiav cov hom phiaj saum toj no.

Yog tias lub zog hluav taws xob ntawm cov roj teeb lithium yog ua tiav lub hom phiaj ntawm lub zog hluav taws xob ntau dua 500Wh / kg raws li tau teem tseg, lub tshuab hluav taws xob muaj roj hluav taws xob uas tsis muaj tam sim no yuav tsis muaj zog. Raws li cov cim hluav taws xob roj teeb tshiab tam sim no rau 500Wh / kg, kev tshawb nrhiav thiab kev txhim kho ntawm cov roj teeb khov kho tau dhau los ua qhov tsis txaus ntseeg. Qhov nruab nrab thiab kev txhim kho ntev ntawm lub zog hluav taws xob tshiab tsheb kev lag luam yuav tsum tau muaj cov txuj ci tshiab, thiab cov roj teeb lithium-ion lub zog yuav tsum los ua cov tseem ceeb thev naus laus zis rau cov tiam tom ntej ntawm lub tsheb fais lithium roj teeb. Nws tsis yog tsuas yog lub ntsiab lus tseem ceeb ntawm kev txhim kho rau cov roj teeb theem nrab yav tom ntej, tab sis kuj tseem yog txoj haujlwm tseem ceeb tam sim no.

Dab tsi yog qhov zoo ntawm roj teeb-lub xeev tau piv nrog cov roj teeb ternary? Ua ntej txhua yam, hais txog lub zog ntawm lub zog, lub qhov rai electrochemical ntawm cov organic electrolytes tam sim no siv nyob rau hauv ternary thiab lwm cov roj teeb lithium-ion tsuas yog txwv, thiab nws tsis yooj yim kom haum rau cov hlau lithium anodes thiab tshiab tsim cov khoom siv cathode zoo. Txawm li cas los xij, cov khoom siv hluav taws xob zoo feem ntau muaj qhov dav dav hluav taws xob muaj peev xwm tshaj li cov organic electrolytes. Lub qhov rais tshuaj pab ntxiv mus ntxiv ua kom lub zog ntawm lub roj teeb. Thib ob, hais txog cov ntim, txij li cov electrolyte hloov los ntawm cov khoom siv hluav taws xob, qhov ntim ntawm cov roj teeb yuav raug me dua nyob rau hauv tib lub zog. Nrog tib cov zog ntawm cov zog, lub zog roj teeb-lub xeev yuav ua me dua. Raws li qhov xwm txheej ntawm lub zog hluav taws xob muaj qhov qub, qhov loj thiab qhov ntim ntawm cov roj teeb solid-state nrog tib lub nqi yuav me dua li ntawm cov roj teeb hluav taws xob. Tsis yog qhov ntawd nkaus xwb, vim tias tsis muaj hluav taws xob hauv cov roj teeb hluav taws xob, nws yuav yooj yim dua rau kev muab khi. Thaum siv nws hauv cov cuab yeej loj xws li tsheb, nws tsis tas yuav ntxiv cov tub yees txias, cov tswj hluav taws xob, thiab lwm yam, uas txuag cov nqi thaum txo nws tus kheej qhov hnyav. Tom qab siv cov khoom hluav taws xob tsis zoo, cov graphite tsis zoo electrode tuaj yeem hloov nrog cov xim hlau, uas yog qhov txo qhov hnyav ntawm tag nrho cov roj teeb.

Los ntawm cov kev pom ntawm kev teeb tsa ntawm cov roj teeb khov kho hauv ntau lub teb chaws, Toyota nce qib ntau hauv cov thev naus laus zis. Nws tau tsim cov sulfide solid-state roj teeb hauv xyoo 2010. Hauv xyoo 2014, lub zog hluav taws xob ntawm lub roj teeb' s sim ua qauv ncav cuag 400Wh / kg. Raws li Lub Ob Hlis 2017, Toyota' s khoom lag luam muaj roj hluav taws xob muaj hluav taws xob muaj ntau txog 30, deb dua li lwm cov tuam txhab. Raws li cov thawj coj ntawm Toyota, Toyota yuav paub txog qhov kev lag luam ntawm sulfide solid-state roj teeb nyob rau xyoo 2020. Tsis tas li ntawd, Samsung tseem tau tiav qee yam kev tshwm sim, siv sulfide-based cov khoom hluav taws xob los sim-tsim tawm 2000mAh, 175Wh / kg laminated tagnrho-cov theem nrab. roj teeb.

Cov tuam txhab lag luam hauv tuam txhab CATL kuj tseem pom zoo rau sulfide solid-state roj teeb, thiab tam sim no tau txhim kho kev txhim kho ntawm sulfide tagnrho-khoom-xeev lithium hlau roj teeb rau EVs. Tsis tas li ntawd, nws tsim nyog sau cia tias Ganfeng Lithium tsis ntev los no tau ua tiav thawj thawj cov roj teeb tshawb nrhiav thiab kev tsim cov phiaj xwm kev ua haujlwm, thiab nws cov qauv tau dhau los ntawm Tuam Tshoj Chaw Tshawb Fawb Tsheb Tshawb Fawb Chaw Tshawb Fawb Tsheb, thiab qhov project tsis muaj kev ua tiav kev coj ua tau zoo ua ntej hauv Suav teb, uas yog tus thawj coj thoob ntiaj teb Qhov kev lag luam thev naus laus zis xav kom ua tiav kev ua lag luam ntau hauv 2019.

Piv nrog roj teeb ternary, roj teeb-lub xeev muaj peev xwm muaj ntau yam zoo, vim li cas lawv tsis muaj peev xwm ua tiav qhov ntau lawm? Tus yuam sij rau cov roj teeb khov kho yog cov khoom hluav taws xob zoo-lub xeev hluav taws xob. Qhov laj thawj tseem ceeb tshaj plaws rau txoj kev nyuaj hauv kev txhim kho ntawm cov roj teeb khov kho nyob rau theem no yog qhov tsis ua tiav ntawm cov khoom siv hluav taws xob kom ua tiav cov khoom tawg. Tsis muaj ntawm cov khoom siv inorganic uas ruaj khov thiab cov khoom siv polymer electrolyte muaj lub siab ionic conductivity thiab mechanical zog, tab sis kuj muaj cov khoom ua zoo.

Cov teeb meem thev naus laus zis ntawm lub zog cov roj ntsha lithium yeej ib txwm yog qhov kev txwv tsis pub siv txoj kev tsim kho tshiab ntawm lub zog hluav taws xob, thiab cov kev txwv tsis pub cov roj teeb uas muaj roj teeb meem nyuaj rau kev tawg yog tseem nyob hauv thev naus laus zis. Nyob rau hnub no' s sib tw muaj zog hauv kev lag luam roj teeb lithium roj teeb, cov tuam txhab uas muaj lub luag tas los feem ntau yog cov uas txawj ua tus tub yees. Lub sijhawm siv roj teeb yog lub thev naus laus zis tseem ceeb ntawm kev tsim kho thev naus laus zis yav tom ntej, thiab nws yog qhov kev pom zoo ntawm kev lag luam. Seb cov tuam txhab Suav puas tuaj yeem yeej&tom ntej no; sib ntaus sib tua nyuaj" tseem xav tau kev sib koom tes ntawm cov npoj yaig hauv kev lag luam.