Cov kev ua tau zoo tshaj tawm Lithium roj teeb hlwb ib txwm muaj kev vam khom cov khoom sib txuas ua ke hauv cov khoom siv thev naus laus zis. The innovation in positive electrode materials, negative electrode materials, separators, and electrolytes by global scientific research and industry is driving the evolution of battery cells towards higher energy density, longer cycle life, and better safety. Qhov no tag nrho cov khoom siv thev naus laus zis muab kev tsav tsheb loj rau lub zog hluav taws xob hluav taws xob tshiab, thiab lwm daim teb.
1 Cov Khoom Siv Hauv Cov Khoom Siv Hauv: Ntsuas Ntsuas Kev Loj Hlob Loj thiab Ruaj Khwv
Tuam Tshoj qhov "High Nickel Ternary" txoj kev txuas ntxiv mus tawg dhau. Lub Ncm911 zoo electrode cov khoom (nrog rau cov ntsiab lus npib tsib xee ntawm 90%) tsim los ntawm ib qho peev txheej ntawm 220mah / g, uas yog qhov muaj peev xwm ntawm lub roj teeb ntau dua 800Wh / l. Los ntawm "Monocrystalline + txheej" yog tawg rau ib lub Clestals ib leeg (particle loj 3 μ μ partic້ນ yog coipo3 nyias zaj duab xis (thickness 2nm). Tom qab 500 mus txog, cov peev txheej khaws cia nce mus txog 90%, daws cov teeb meem ntawm cov txheej txheem vau rau hauv cov ntaub ntawv nickel. Nyob rau hauv lub siab -}}}}}}}}}}}} Cov roj teeb hluav taws xob lub tsheb, cov khoom no ua rau ntau dua 1000 kilometers.
Lub tswv yim ntawm Cobalt dawb Cathodes hauv Tebchaws Asmeskas txo cov nqi. Lub Lithium Manganese Hlau Phosphate (LMFP) Zoo electrode tsim los ntawm Tesla tau nce nws cov ntsiab lus ntawm 20%), thaum nce lub tshuab hluav taws xob ntawm 0.2V. Nws "kua -} theem synthesis" txheej txheem txo cov nqi ntawm ncm thiab tsis muaj kev phom sij (kom tsis txhob muaj cov peev txheej). Cov kev ntsuam xyuas tau qhia tias cov hlwb siv LMFP muaj lub peev xwm tuav tau ntawm 85% ntawm {})℃tshaj li LFP thiab haum rau tsawg-kub scenarios.
2 tsis zoo electrode cov khoom: Lub sijhawm tuaj txog ntawm silicon - based era
Nyiv kev coj mus muag rau hauv "Silicon Carbon Composites". Silicon carbon carbon tsis zoo electrode tsim los ntawm Panasonic (nrog cov khoom muaj peev xwm ntawm 20%) muaj ib qho peev xwm ntawm cov roj teeb tsis zoo ntawm cov roj teeb ntawm 20%. Los ntawm kev tsim ntawm "nano silicon hais lus + cov me me ntawm silicon cov nplais yog tswj tau ntawm 50nm (kom tsis txhob muaj cov nplaim hluav taws xob nrog cov tawv ntoo txheej txheem (tuab 5nm). Tom qab 200 mus txog, lub peev xwm khaws tus nqi khaws cia ncav cuag 85%. Lub teeb hluav taws xob tsis zoo tau raug thov rau qee lub tsheb hluav taws xob hluav taws xob, ua tiav lub zog ntom ntawm 300Wh / kg hauv lub roj teeb pob.
Teb chaws Europe 'titanium raws li kev tsis zoo electrode' tsom rau kev nyab xeeb. Lub Lithium Titanate (LTO) tsis zoo electrode ntawm lub tuam txhab German muaj cov nqi xoom yam ntxwv (ntim hloov pauv<1%), with a cycle life exceeding 30000 times, which is 10 times that of graphite. Although the specific capacity is only 175mAh/g (lower than graphite), it can be fully charged to 80% in 10 minutes at a high rate of 10C, and can still function normally at -40 ℃. In energy storage cells, the LTO negative electrode extends the system's cycle life to 15 years, which is twice as long as traditional cells and suitable for grid level energy storage scenarios.
3 diaphragm thiab electrolyte: invisible lav ntawm kev nyab xeeb thiab conductivity
Kaus lim qab teb txoj hlua 'coated membrane' txhim kho siab tiv taus kub. Lg Chem Cov Ceramic Coated Diahphragm (Substrate PP, coated nrog ₂ OCTEDY ntawm 300gf, uas yog 50% siab dua li diaphragms. Nyob rau hauv lub thermal khiav ntsuam xyuas, tus diaphragm tuaj yeem ncua lub sij hawm luv luv ntawm lub roj teeb rau 15 feeb, yuav lub sijhawm rau kev teb cov kev nyab xeeb ntawm lub roj teeb. Nws "Nanopore" Tsim "Tsim (nrog lub pore loj ntawm 0.1 μ m) Ua rau ion kev coj ua ntawm lub teeb roj teeb.
Tuam Tshoj tus 'nplaim taws retardant electrolyte' kov yeej cov ntsiab lus kev nyab xeeb. Lub "Lifsi + phosphate ester" electrolyte tsim los ntawm ib qho kev lag luam hluav taws xob (triothyl phosphate ester) Nyob rau hauv koob muaj kev ntsuas puncture, lub roj teeb hlwb siv cov roj hluav taws xob no tsuas yog haus luam yeeb thiab tsis txhob tawg ul94 v- 0 ntawv pov thawj. Nyob rau tib lub sijhawm, cov electrolyte pab txhawb nqa lub roj teeb ntawm kev tswj hwm tus nqi ntawm 70% ntawm -30 degree, nthuav cov ciaj ciam ntawm cov kev siv kub-kub.
Cov khoom siv thev naus laus zis ntawm Lithium roj teeb hlwb yog hloov los ntawm "ib qho kev ua kom zoo" rau "tag nrho cov kab ke sib koom tes". Nyob rau yav tom ntej, nrog kev loj hlob ntawm cov khoom {1} Lub neej muaj kev nyab xeeb tshaj plaws ntawm 1000 DEJ