Nyob rau hauv pem hauv ntej ntawm lithium roj teeb slurry mixing, txheej, thiab tom qab sib dhos, slurry sedimentation, gelation (jelly-zoo li sib xws), thiab txheej lub taub hau blockages yog peb qhov "mob" uas teeb meem txheej txheem engineers. Cov teeb meem no tuaj yeem ua rau muaj kev cuam tshuam ntxiv xws li electrode cracking, zaj duab xis delamination, thiab roj teeb deformation. Xws li instabilities tsis tsuas yog ua rau tsis zoo electrode sib xws tab sis kuj ncaj qha rub down ntau lawm tawm los thiab muaj peev xwm.
Feem ntau, peb nyiam kho cov txheej txheem sib xyaw lossis cov ntsiab lus ruaj khov, saib xyuas lub luag haujlwm tseem ceeb ntawm tus menyuam yaus tsis yog qhov tseem ceeb hauv cov qauv - cov ntawv khi. Kab lus no yuav pib los ntawm micro-mechanisms ntawm binders, unravel lub complexities txheej los ntawm txheej, thiab muab ib tug "ib- nres" kev daws teeb meem thiab kev qhia txog kev daws teeb meem rau cov teeb meem hais txog.
I. Yuav Ua Li Cas Hais Txog Slurry Sedimentation?
Ua rau:
(1) Hom CMC xaiv tsis tsim nyog. Qhov℃ntawm kev hloov pauv (DS) thiab qhov hnyav molecular ntawm CMC tuaj yeem cuam tshuam rau slurry stability. Piv txwv li, CMC nrog qis DS muaj dej tsis zoo tab sis zoo wettability rau graphite; Txawm li cas los xij, nws muaj peev xwm tsis muaj zog slurry ncua kev kawm ntawv.
(2) Kev siv CMC tsis txaus, ua tsis tau zoo tshem tawm cov khoom slurry.
(3) Ntau dhau CMC koom nrog hauv cov txheej txheem kneading, ua rau tsis txaus CMC muaj nyob nruab nrab ntawm cov khoom rau kev ncua, feem ntau ua rau tsis zoo slurry stability.
(4) Cov neeg kho tshuab siab shear rog lossis hloov pauv hauv slurry pH tuaj yeem ua rau SBR demulsification, ua rau slurry sedimentation.
Kev daws:
(1) Hloov mus rau lossis sib xyaw nrog CMC muaj DS siab thiab hnyav molecular. Piv txwv li, siv kev sib xyaw ua ke ntawm WSC (tsawg molecular yuag, qis DS, zoo graphite wettability, tsis muaj zog ncua kev kawm ntawv) thiab CMC2200 nyob rau hauv loj ntau lawm cov qauv tuaj yeem txhim kho slurry stability.
(2) Kev nce CMC ntau npaum li cas yog ib qho txiaj ntsig zoo tshaj plaws los txhim kho slurry stability, tab sis qhov sib npaug yuav tsum raug pom los txiav txim siab txog cov txheej txheem muaj peev xwm thiab lub roj teeb qis - qhov kub thiab txias ua haujlwm.
(3) Txo tus nqi ntawm CMC koom nrog hauv kneading thiab nce cov ntsiab lus ntawm CMC dawb tuaj yeem txhim kho slurry stability rau qee yam.
(4) Tom qab ntxiv SBR rau lub slurry system, txo cov stirring ceev ntawm planetary tov khoom los tiv thaiv demulsification.
Tshawb xyuas peb cov khoom siv roj teeb kho kom haum rau kev ua kom zoo slurry sib xyaw ua haujlwm.
II. Lim Thaiv Thaum Pom - Yuav Ua Li Cas?
Ua rau:
(1) Kev ntub dej tsis zoo ntawm cov khoom siv ua haujlwm, ua rau tsis txaus dispersion.
(2) SBR demulsification ua rau pom tsis ua haujlwm.
Kev daws:
(1) Siv cov txheej txheem kneading los txhim kho kev tawg.
(2) Tom qab ntxiv SBR rau lub slurry system, txo cov stirring ceev kom tsis txhob demulsification.
III. Yuav Ua Li Cas Slurry Gelation?
Ua rau:Gelation feem ntau poob rau hauv ob pawg: lub cev gel thiab tshuaj gel.
(1) Lub cev Gel: Ua los ntawm cathode active khoom, conductive carbon dub (SP), los yog hnyav NMP absorbing noo noo, los yog ntau dhau ib puag ncig cov av noo. Cov khoom yog ib puag ncig los ntawm PVDF polymer chains. Thaum cov dej muaj ntau tshaj qhov txwv, cov saw hlau txav tau cuam tshuam, ua rau kev sib tshuam - chain entanglement, txo slurry fluidity, thiab gelation.
(2) Tshuaj Gel: Nws tuaj yeem tshwm sim thaum lub sijhawm ua haujlwm lossis khaws cia siab -nickel lossis siab -alkalinity active khoom. Nyob rau hauv lub siab pH ib puag ncig tsim los ntawm cov residues yooj yim, PVDF polymer caj qaum tau nkag mus rau dehydrofluorination (poob ntawm HF), tsim ob daim ntawv cog lus. Cov dej uas twb muaj lawm lossis amines hauv cov kuab tshuaj tuaj yeem tawm tsam ob daim ntawv cog lus no, ua rau hla - txuas. Qhov no ua rau muaj peev xwm ntau lawm thiab ua rau lub roj teeb ua haujlwm tsis zoo. Feem ntau, gelation phem zuj zus nrog nce alkalinity ntawm cov khoom siv.
Kev daws:
(1) Lub cev Gel: Tswj los ntawm kev tswj hwm cov dej noo hauv cov ntaub ntawv raw thiab ib puag ncig, thiab siv cov kev sib tw kom tsim nyog thaum lub sij hawm slurry cia.
(2) Tshuaj Gel: tuaj yeem txo tau los ntawm txoj hauv qab no:
* Cov khoom siv qhuav qhuav thiab cov pa roj carbon monoxide ua ntej dispersion kom tshem tawm cov dej adsorbed; siv ntau dua purity NMP.
* nruj me ntsis tswj ib puag ncig cov av noo thaum lub sij hawm sib tov.
* Tau txais NCM cov ntaub ntawv nrog txo qhov chaw dawb Li kom qis alkalinity.
* Tsim Anti-gel PVDF. Lub tswv yim kev txhim kho muaj xws li grafting lwm cov monomer units (xws li, yas ether, hexafluoropropylene, tetrafluoroethylene) los hloov H/F nyob rau hauv lub -CH2-CF2- chav tsev, inhibiting tas mus li HF poob thiab txo qhov chaw sib txuas.
* Tsim cov tsis yog -PVDF cathode binders. Txij li cov txheej txheem saum toj no tsis tuaj yeem cuam tshuam PVDF dehydrofluorination, kev pheej hmoo tseem nyob thaum siv cov alkaline cathodes siab (siab-nickel, NCA) lossis cov khoom siv ntxiv (alkaline Li2CO3). Txhim kho lwm txoj hlua khi lub hom phiaj los daws qhov teeb meem no kom huv si.
Kawm paub txog peb cov khoom siv roj teeb siab heev, suav nrog cov binders tshwj xeeb.
IV. Poor Coated Electrode Appearance (Cracking)
Ua rau:
(1) Lub binder nws tus kheej muaj qhov kub hloov pauv iav siab (Tg), ua rau nws cov yeeb yaj kiab - ua kom kub siab tshaj qhov kub txheej. Kev tsim cov yeeb yaj kiab nyuaj ua rau electrode tawg.
(2) Nyob rau hauv dej-raws li binders, loj shrinkage thaum lub sij hawm poob dej nyob rau hauv kev kho yuav ua rau tag nrho cov electrode tawg, piv txwv li, nyob rau hauv aqueous PAA systems.
Piv txwv li: Polyacrylic acid polymers nruj nrog tsis yooj yim. Thaum lub sij hawm tsim hluav taws xob, loj - cheeb tsam curling thiab tawg tuaj yeem tshwm sim, ua rau cov khoom lag luam qis heev hauv txheej thiab winding.
PAA electrode qhia curling thiab tawg thaum ua
Kev daws:
(1) Yog tias cov txheej txheej tsis zoo yog vim lub binder cov yeeb yaj kiab siab - ua qhov kub thiab txias, hloov mus rau cov ntawv khi nrog cov yeeb yaj kiab qis dua - ua kom sov.
(2) Rau aqueous PAA systems, ntxiv EC raws li ib tug plasticizer ho pab txhim kho electrode cracking.
Mandrel xeem ua tau zoo dua electrode yooj
V. Poor Coated Electrode Appearance (Bubbles)
Ua rau:
(1) Insoluble fibers hauv CMC tuaj yeem ua npuas npuas thaum txheej txheej.
(2) Ntau dhau emulsifier hauv SBR. Emulsifiers ua zoo li surfactants, stabilizing npuas nto nro thiab tiv thaiv npuas tshem tawm.
Emulsifier stabilizing ua npuas ncauj
Kev daws:
(1) Siv CMC nrog cov ntsiab lus tsis muaj dej tsis txaus, piv txwv li, hloov CMC2200 nrog MAC500 hauv qee cov qauv EV.
(2) Txo tus nqi ntawm emulsifier hauv SBR siv.
VI. Roj teeb Gassing ntawm Kub Kub?
Ua rau:Thaum cov polymer molecules muaj ntau pawg polar functional, lawv nyiam nqus noo noo. Cov dej noo no tuaj yeem cuam tshuam nrog lithium ions thaum lub sij hawm siab - qhov kub thiab txias, tsim cov roj hydrogen.
Kev daws:Tswj cov dej noo nyob rau hauv lub xov tooj ntawm tes thiab/los yog ua haujlwm siab -kub, siab -State- ntawm -Charge (SOC) txheej txheem tsim.
Piv txwv:Cells siv SD-3 binder pom o tseem ceeb vim gassing thaum 85℃cia. Los ntawm kev tswj cov cell ya raws qis dua 100ppm thiab siv cov txheej txheem tsim SOC siab, qhov teeb meem ntawm qhov kub thiab txias tau zoo dua.
VII. Kev Muaj Peev Xwm Ceev Fade hauv siab -Cycling kub?
Ua rau:
(1) Ntau dhau binder o ntawm qhov kub thiab txias, cuam tshuam qhov txuas txuas txuas ntxiv ntawm cov khoom.
(2) Kev ruaj ntseg tsis zoo ntawm cov ntawv khi ntawm qhov kub thiab txias, ua rau kev tawg lossis tshuaj lom neeg nrog Li.
(3) Tom qab siab - kub raug rau electrolyte, lub binder lub zog txo, tsis ua hauj lwm zoo active cov khoom pulverization thaum caij tsheb kauj vab.
Kev daws:
(1) Xaiv los yog muab cov binders nrog ntau dua Tg, tsim nyog txo lawv cov affinity nrog cov electrolyte kom txo tau siab - qhov kub thiab txias kev puas tsuaj.
(2) Rau cov khoom siv silicon anode nrog kev nthuav dav loj, siv siab -modulus binders xws li PA/PI/PAI hom kom muaj txiaj ntsig zoo los yog txo cov silicon particle cracking thiab pulverization thaum caij tsheb kauj vab.
VIII. Lub roj teeb puas ua rau Deformation?
Ua rau:Thaum lub polymer binder nruj dhau lawm, nws tsim kev ntxhov siab tseem ceeb hauv cov electrode. Thaum lub sij hawm them nqi / tawm mus, qhov kev tso tawm ntawm qhov kev ntxhov siab sab hauv tuaj yeem ua rau electrode twisting thiab deformation, thaum kawg ua rau lub roj teeb deformation.
Kev daws:Ntxiv cov plasticizers los txo cov kev ntxhov siab hauv electrode.
Piv txwv:BI-4 binder tau pom zoo kinetic kev ua tau zoo hauv CEs tab sis ua rau lub roj teeb loj heev deformation. Txhawm rau txo qhov no, 2wt% EC additive tau qhia thaum sib xyaw slurry. EC, ib tug me me molecule plasticizer, volatilizes kiag li thaum lub sij hawm electrode ziab, yog li tsis muaj kev cuam tshuam tseem ceeb ntawm cell hluav taws xob kev ua tau zoo thaum txhim kho qhov teeb meem deformation.
Xaus
Txawm hais tias cov binders tsuas yog "poob hauv dej hiav txwv" ntawm cov qauv electrode, lawv tuav tus yuam sij rau slurry rheology thiab dispersion stability. Tau ntsib cov teeb meem xws li sedimentation, gelation, blockages, thiab lawv cov teeb meem derivative xws li electrode cracking thiab siab - kub gassing, ib qho - qhov kev hloov kho qhov loj me feem ntau tsuas yog hais txog cov tsos mob, tsis yog lub hauv paus. Tsuas yog los ntawm kev nkag siab tob tob txog cov binder cov qauv molecular, cov yam ntxwv ntawm kev sib cais, thiab kev sib cuam tshuam nrog cov ntaub ntawv nquag tuaj yeem peb txheeb xyuas qhov "mob" thiab sau cov kev kho kom raug. Peb cia siab tias txoj hauv kev tau muab rau hauv tsab xov xwm no muab cov txiaj ntsig zoo siv rau kev ua kom zoo dua koj cov slurry system, kho cov txheej txheem tsis zoo, thiab txhim kho cov khoom siv hluav taws xob zoo.
Hais txog TOB NEW ENERGY
TOB NEW ENERGY yog tus muab kev pabcuam zoo tshaj plaws rau kev lag luam roj teeb thiab R & D sectors. Peb tshwj xeeb hauv kev xa cov khoom kawg - mus rau - xaus cov roj teeb cov kab ntau lawm, cov kab tsav tsheb, thiab cov kab kev sim ua kom haum rau koj cov peev txheej tshwj xeeb thiab cov khoom tsim tawm. Peb cov kev pabcuam suav nrog txhua yam los ntawm kev tsim thiab kev tsim kho vaj tse mus rau kev xaiv cov khoom siv, muab khoom, teeb tsa, commissioning, thiab kev cob qhia cov neeg ua haujlwm.
Peb txaus siab rau peb tus kheej ntawm kev muab kev txiav- ntug roj teeb kev txhawb nqa technology, suav nrog kev txawj ntse hauv cov khoom siv- lub xeev cov roj teeb, sodium- ion roj teeb, lithium- roj teeb sulfur, thiab tshuab electrode qhuav. Peb pab neeg ua haujlwm ntawm cov kws tshaj lij roj teeb muab kev qhia txog kev txhim kho cov khoom lag luam thoob plaws lub peev xwm, tus nqi peev xwm, lub neej voj voog, thiab kev nyab xeeb.
Tsis tas li ntawd, peb muab ntau yam khoom siv kho kom haum rau txhua theem los ntawm kev sim mus rau kev tsav mus rau kev tsim khoom loj, nrog rau cov ntaub ntawv tseem ceeb ntawm cov khoom siv roj teeb siab heev los txhawb koj txoj kev tshawb fawb thiab kev tsim kho. Cia siab rau TOB TSHIAB ENERGY rau tag nrho koj cov roj teeb tsim thiab R & D xav tau.
Tiv tauj peb hnub nolos tham txog yuav ua li cas peb tuaj yeem muaj zog rau koj qhov kev tsim kho tshiab.
