Tshem tawm cov lus qhia

Hmoov zoo, raws li kuv txoj haujlwm dhau los, kuv tau tshem ntau pua lub roj teeb hauv kuv txhais tes, suav nrog cov roj teeb lithium-ion hlau phosphate, roj teeb terpolymer lithium, cov roj teeb hloov tau yooj yim thiab cov roj teeb cylindrical. Hnub no kuv yuav disassemble thiab qhia koj lub xeev ntawm lub puab vaj huam sib luag ntawm lub roj teeb.

Raws li lithium ions nkag mus, cov graphite anode maj mam tig golden, tab sis nws yog ib qho nyuaj rau pom cov anode los ntawm cov xim hloov. Peb feem ntau txiav txim siab them thiab tshem tawm cov txheej txheem thiab kev ua haujlwm zoo ntawm lub roj teeb los ntawm kev tshem tawm cov roj teeb thiab saib xyuas lub xeev ntawm cov hluav taws xob tsis zoo.

SOC = 7%, muaj cov khoom nyob hauv nruab nrab ntawm cov electrode, thiab cov electrode tsis hloov xim.

Thaum SOC = 14%, cov khoom nyob hauv nruab nrab ntawm cov electrode tuaj yeem pom. Me ntsis discoloration.

SOC yog 26% me ntsis xiav.

SOC = 53.9%, tig xiav, npuas tuaj yeem pom.

Charge raws li txoj cai = 70.0%, los ntawm tsaus liab doog mus rau liab, pom uncharged cheeb tsam dub. Tsis pom muaj nag lossis daus lithium ion.

Tag nrho cov nqi = 81.5%, tig mus rau kub, pom cov xim dub tsis muaj nqi. Koj tuaj yeem pom cov evolution ntawm dawb lithium.

Raws li tuaj yeem pom los ntawm daim duab saum toj no, thaum lub xeev them tsawg dua 50%, lub xeev electrode tsis hloov ntau. Kev hloov pauv ntawm cov electrode tuaj yeem pom saum toj 50%. Raws li pom nyob rau hauv daim duab 4, ib tug loj tus naj npawb ntawm npuas yuav pom nyob ib ncig ntawm 3.6V. Nws tuaj yeem suav tau tias muaj qhov hloov pauv tseem ceeb ntawm daim duab 5 thiab daim duab 6. Lub xeev them nyiaj hloov pauv tsuas yog 10%, tab sis lub xeev electrode yog txawv kiag li.

Electrode lub xeev thaum lub roj teeb SOC = 100%. Qhov dawb yog lithium.

Tom qab tshem tawm qhov dawb, qhov saum npoo ntawm tus ncej qis tsis tig kub, qhia tias lithium ions tsis tau kos rau hauv cov khoom siv electrode zoo. Nyob rau hauv luv luv, cov khoom zoo nyob rau hauv cov khoom no tiv thaiv lithium ions los ntawm embedded, lithium ions precipitate rau saum npoo. Nws yog speculated tias cov binders (CMC thiab SBR) yog unevenly faib rau ntawm electrode nto thiab coated nrog carbon nyob rau hauv cov khoom siv anode, ua rau lithium ion implantation.

Thaum lub xeev them nqi yog 100%, feem ntau ntawm cov pob dub yog qhov chaw tsis muaj nqi. Muaj ntau qhov chaw dub ntawm lub roj teeb, uas yog ib qho tseem ceeb rau lub peev xwm ntawm lub roj teeb. Cov yam tseem ceeb uas ua rau cov pob dub yog qhov sib xws ntawm slurry, kev tswj ceev ceev ntawm txheej txheej, kev tswj nruj ntawm winding thiab tsim cov roj.