Yuav ua li cas txhim kho kev nyab xeeb ntawm lithium roj teeb

Qhov zoo ntawm cov tsheb tshiab lub zog yog tias lawv muaj cov pa roj carbon tsawg dua thiab ib puag ncig zoo dua li cov tsheb uas siv roj av. Nws siv cov roj tsheb tsis sib xws raws li lub zog siv hluav taws xob, xws li roj teeb lithium, roj hydrogen, thiab lwm yam. Daim ntawv thov ntawm lithium-ion roj teeb kuj dav heev, nrog rau lub zog tshiab tsheb, xov tooj ntawm tes, laptops, ntsiav tshuaj PCs, mobile zog, tsheb kauj vab hluav taws xob. , cov cuab yeej hluav taws xob, thiab lwm yam.

Txawm li cas los xij, kev nyab xeeb ntawm lithium-ion roj teeb yuav tsum tsis txhob kwv yees. Ib tug xov tooj ntawm cov xwm txheej qhia tau hais tias thaum tib neeg tsis raug nqi, los yog qhov kub thiab txias ambient siab dhau lawm, nws yog ib qho yooj yim heev ua rau lithium-ion roj teeb spontaneous combustion, tawg, uas tau dhau los ua qhov mob loj tshaj plaws nyob rau hauv txoj kev loj hlob ntawm lithium-ion roj teeb.

Txawm hais tias cov khoom ntawm lithium roj teeb nws tus kheej txiav txim siab nws txoj hmoo "flammable thiab explosive", tab sis nws tsis yog kiag li tsis yooj yim sua kom txo tau qhov kev pheej hmoo thiab kev nyab xeeb. Nrog kev nce qib ntawm cov roj teeb thev naus laus zis, ob lub tuam txhab xov tooj ntawm tes thiab cov tuam txhab tsheb tshiab lub zog, los ntawm kev tswj cov roj teeb tsim nyog thiab kev tswj xyuas thermal, lub roj teeb yuav muaj peev xwm ua kom muaj kev nyab xeeb, thiab yuav tsis tawg lossis tshwm sim tshwm sim tshwm sim.

1. Txhim kho kev nyab xeeb ntawm electrolyte

Muaj qhov ua haujlwm siab ntawm electrolyte thiab ob qho tib si zoo thiab tsis zoo electrodes, tshwj xeeb tshaj yog thaum kub kub. Txhawm rau txhim kho kev nyab xeeb ntawm cov roj teeb, kev txhim kho kev nyab xeeb ntawm electrolyte yog ib txoj hauv kev zoo dua. Los ntawm kev ntxiv cov khoom siv ntxiv, siv cov ntsev lithium tshiab thiab siv cov kuab tshuaj tshiab, kev nyab xeeb ntawm electrolyte tuaj yeem daws tau zoo.

Raws li cov haujlwm sib txawv ntawm cov khoom siv ntxiv, lawv tuaj yeem muab faib ua pawg hauv qab no: kev tiv thaiv kev nyab xeeb additives, film-forming additives, cathode tiv thaiv additives, lithium ntsev stabilization additives, lithium nag lossis daus txhawb additives, collector kua anti-corrosion additives, enhanced wettability additives. , lwm.

2. Txhim kho kev nyab xeeb ntawm cov khoom siv electrode

Lithium hlau phosphate thiab ternary composites raug suav hais tias yog tus nqi qis, "zoo heev" cov ntaub ntawv cathode uas muaj peev xwm ua tau nrov siv hauv kev lag luam tsheb hluav taws xob. Rau cov khoom siv cathode, txoj hauv kev los txhim kho nws txoj kev nyab xeeb yog txheej txheej hloov kho, xws li hlau oxides ntawm cov khoom siv cathode, tuaj yeem tiv thaiv kev sib cuag ncaj qha ntawm cov khoom siv cathode thiab electrolyte, inhibit cathode cov khoom theem hloov, txhim kho nws cov qauv. stability, txo qhov kev tsis sib haum xeeb ntawm cations nyob rau hauv lub lattice, thiaj li yuav txo tau sab cov tshuaj tiv thaiv tshav kub ntau lawm.

Cov khoom siv tsis zoo electrode, vim nws qhov chaw feem ntau yog ib feem ntawm lithium-ion roj teeb uas muaj feem cuam tshuam rau thermochemical decomposition thiab exotherm, kev txhim kho thermal stability ntawm SEI zaj duab xis yog ib txoj hauv kev los txhim kho kev nyab xeeb ntawm cov khoom tsis zoo electrode. Lub thermal stability ntawm cov ntaub ntawv anode tuaj yeem txhim kho los ntawm kev tsis muaj zog oxidation, hlau thiab hlau oxide deposition, polymer lossis carbon cladding.

3. Txhim kho kev tiv thaiv kev nyab xeeb tsim ntawm lub roj teeb

Ntxiv nrog rau kev txhim kho kev nyab xeeb ntawm cov khoom siv roj teeb, ntau yam kev tiv thaiv kev nyab xeeb siv hauv cov roj teeb lithium-ion ua lag luam, xws li teeb tsa roj teeb kev nyab xeeb li qub, thermally soluble fuses, txuas cov khoom siv nrog qhov zoo kub coefficients hauv series, siv thermally kaw diaphragms, thauj khoom tshwj xeeb tiv thaiv. circuits, thiab cov kev tswj xyuas roj teeb siab, kuj txhais tau tias yuav txhim khu kev ruaj ntseg.

Post lub sij hawm: Feb-14-2023