Kev txiav txim siab tsis muaj peev xwm yog kev txiav txim siab tsis tau paub txog kev sib piv tom qab kev tawm mus muaj peev xwm ua kom tsis muaj peev xwm nrog tus qauv tsim. Yog tias ntsuas qhov peev xwm poob qis dua cov qauv tsim qauv, thawj kauj ruam yog los xyuas seb cov txheej txheem tsim tam sim no, them lub sijhawm txiav txim siab, thiab ntsuas kub).
① Yog tias cov kauj ruam tsim tau tseeb, rov ua dua tus xov tooj siv cov khoom siv lossis cov kev txiav txim siab tawm cov teeb meem uas muaj peev xwm tsim cov teeb meem.
② Yog tias lub peev xwm tseem txwm ua tom qab hloov cov khoom siv, tus thawj tsim cov cuab yeej yog faulty.
③ Yog tias qhov teeb meem muaj peev xwm muaj txiaj ntsig ntau tom qab rov ua dua tshiab, lub cell tau lees paub rau kev nthuav tawm muaj peev xwm tsawg.
Tom qab paub tseeb tias muaj peev xwm tsawg, ntxiv kev tsom xam kom txiav txim siab nws cov zaus thiab qhov hnyav. Ua ntej cov hauv paus hniav system-ua rau tsom xam, disassemble thiab tshawb xyuas cov nyiaj muaj peev xwm qis. Yog tias tsis muaj kev txawv txav, muaj peev xwm yuav suav nrog cov hluav taws xob tsis txaus siab thiab muaj zog tsim. Yog tias tsis xws luag pom, tsim qauv lossis tsim teeb meem tsim nyog yuav tsum tau txiav txim siab.
Hauv paus ua laj thawj tsom xam: Tsim thiab tsim kev xam pom
I. DESUCE-ntsig txog yam
1. Cov khoom sib xyaw
Qhov sib raug zoo ntawm qhov tsis zoo electrode thiab electrolyte kev cuam tshuam tseem ceeb. Rau tshiab tau qhia cov ntaub ntawv anode lossis cov elecolytes, rov ua kom muaj lithium plating pom thaum kuaj cov khoom siv tsis ua haujlwm. Tej zaum mismatch mechanism muaj xws li:
① Ua tsis tiav, tuab heev tuab, lossis tsis khov SEI txheej thaum lub sijhawm tsim.
② Pc (propylene carbonate) hauv electrolyte ua rau graphite exfoliation exfoliation.
③ Kev Qwj Hluav Taws Xob Areal Ntoos Hlav / Kev Ua Yeeb Yam Sib Txawv / Kev Density tabkaum Pinde-Kev Ua Haujlwm Muaj Peev Xwm.
2. Muaj peev xwm tsim tau paj ntaub
Qhov zoo electrode tshwj xeeb muaj peev xwm: kev tsim qauv yuav tsum muaj nyiaj rau txheej thev, thiab tsim muaj peev xwm los ntawm tab adhesion. Rau cov ntaub ntawv tshiab, ntsuas qhov tseeb qhov kev ua tau muaj peev xwm nyob rau hauv cov kab ke muab (anode / electrolyte pairing). Nco ntsoov tias lub peev txheej tshwj xeeb sib txawv nrog tus nqi tsim, them cov nqi txiav tawm, cov nqi cycling, thiab cov qauv siv hluav taws xob. Overestimating zoo qhov tseeb electrode lub peev xwm ua rau inflated tsim txiaj thiab cov peev txheej muaj peev xwm tsawg.
Kev tsis zoo rau hluav taws xob ntau dhau thiab CB tus nqi: ntau dhau ntawm Electrode Lithium siv thaum SEI tsim kom txo tau thawj lub voj voog muaj peev xwm.
3. Electrolyte txhaws thiab ua haujlwm tuav
Tsis muaj peev txheej electrolyte txhaws txo cov lithium-ion intercalation / dequitcalation efficiency. Cov Hlwb nrog ua tau hluav taws xob tsis txaus siv hluav taws xob muab cov hluav taws xob qhuav thiab nyias voos plating rau ntawm anode nto, ncaj qha pab txhawb rau kev muaj peev xwm.
Ii. Kev tsim khoom-cuam tshuam ntsig txog
1. TXHEEJ TXHEEM ENVE VILLITY sib txawv
Kev ruam dhau ntawm cov txheej txheem zoo / cov hluav taws xob tsis zoo ncaj qha ua rau muaj peev xwm tsawg. Rau cov electrodes zoo, lees paub txheej phaus ntawm cov post-kom qhuav ntsuas kev ntsuas. Tsis yog-uniform coating Thickness ("yin-yaj txheej"), tshwj xeeb yog hluav taws xob underconating, yog lwm tus pab txhawb. Overcoating ntawm cov electrodes zoo yuav qis tshwj xeeb muaj peev xwm tab sis feem ntau nce tag nrho cov peev xwm.
2. Tshaj-sib dhos thaum tseem ceeb
Tshaj-sib piv kev puas tsuaj Cov qauv khoom siv, muaj pov thawj los ntawm SHINY electrode chaw. Nyob rau hauv Cathodes, qhov no cuam tshuam lithium deintercales; Hauv anodes, nws induces nto lithium plating thiab peev xwm ploj mus.
3. Sib Dhia Taus
Kev sib txawv ntawm cov txheej txheem sib txawv, cais tawm wrinkles, lossis sab hauv micro-luv luv nce hauv zos cuam tshuam thiab muaj peev xwm degrade. Wrinkled separators ua tsis tiav Lithium sib tshuam (tsis yog-golden anode tsos) ntawm cov cheeb tsam cuam tshuam.
4. Cov ntsiab lus noo noo
Txhawb cov roj av noo noo (los ntawm cov electrodes, electrolyte, discopter guanbox deas point, lossis degassing cov txheej txheem thiab muaj peev xwm ploj.
5. Ib puag ncig tswj hwm
Cov av noo nrawm nrawm nrawm nrawm, thaum tsis kub kub cuam tshuam lithium-ion diffusion, ob leeg txo peev xwm. Tsim cov kev kub ntxhov cuam tshuam ntau kuj cuam tshuam rau kev ntsuas muaj peev xwm.
6. Lwm yam
Txawv teb chaws: nws yog xim hlau / sib nqus impurities nce kev tawm tsam tus kheej, ua rau pom muaj peev xwm tsawg muaj peev xwm tom qab tsim.
Pre-Tsim Cia: Lub sijhawm ntev cia nyob rau hauv qhov kub / av noo nyob hauv cov electrodes thiab electrolytes, ua rau poob peev.
Ⅲ. Tag
Los ntawm cov txheej txheem tshawb xyuas cov khoom siv - los ntawm cov khoom sib xyaw ua ke thiab tsim qauv rau cov txheej txheem kev tswj hwm thiab ib puag ncig kev ua kom muaj peev xwm tsawg dua tuaj yeem txheeb xyuas thiab daws tau.
Tob Lub Zog Tshiabmuab kev vam meejNtsuas cov roj teebEmpower Engineers thiab cov kws tshawb nrhiav kom qhib lub roj teeb ua haujlwm los ntawm kev ntsuas ntsuas thiab kev sim siv. Quantify Lub zog siv tau nrog kev kuaj xyuas cov qhab nia siv peb cov roj teeb muaj peev xwm ntsuas tau.
