Txhim kho roj teeb txheej Adhesion nrog siab -Power Corona kho
Abstract
Kev nrhiav tsis tu ncua ntawm lub zog ntau dua, lub neej voj voog ntev dua, thiab txhim kho kev nyab xeeb hauv lithium{0}}ion roj teeb tau tso qhov kev xav tau tsis tau muaj dua los ntawm kev tsim khoom. Ib qho tseem ceeb, tab sis feem ntau tsis saib xyuas, cov kauj ruam hauv electrode ntau lawm yog adhesion ntawm cov khoom siv txheej txheej thiab cov ntawv sau tam sim no. Cov adhesion tsis zoo ua rau delamination, nce kev tiv thaiv sab hauv, thiab kev puas tsuaj loj. Tsab ntawv xov xwm no tshawb fawb txog kev siv lub siab -kev kho mob corona uas ua tau zoo heev, qhuav, thiab ib puag ncig tus phooj ywg txoj kev los txhim kho lub zog saum npoo thiab ntub dej ntawm cov hlau foils, yog li ua kom cov txheej txheem zoo dua rau kev ua haujlwm tom ntej - tiam roj teeb.
1. Kev Taw Qhia: Kev Sib Tw Adhesion hauv Kev Tsim Roj Teeb
Tus qauv lithium-ion roj teeb electrode yog cov qauv sib xyaw uas cov slurry slurry ntawm cov khoom siv nquag (xws li, Lithium Cobalt Oxide rau cathodes, Graphite rau anodes), cov khoom siv hluav taws xob, thiab cov binders yog coated rau nyias hlau foils- feem ntau yog txhuas rau cathode thiab tooj liab. Lub siab ncaj ncees ntawm cov txheej txheej no yog qhov tseem ceeb.
Tsis txaus adhesion ntawm cov ntawv ci cov ntawv ci- txheej txheej tuaj yeem ua rau:
Delamination:Cov txheej txheem cais tawm ntawm cov ntawv ci thaum lub sij hawm calendering, slitting, los yog cell sib dhos.
Nce Resistance:Kev sib cuag tsis zoo elevates interfacial hluav taws xob tsis kam, txo cov zis hluav taws xob thiab kev ua haujlwm zoo.
Capacity Fade & Cycle Life Reduction:Cov khoom siv hluav taws xob cais tawm ua cov khoom siv hluav taws xob tsis zoo, ua rau poob peev xwm sai.
Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb:Delamination tuaj yeem tsim cov hotspots thiab sab hauv luv luv Circuit Court, ua rau thermal runaway.
Cov txheej txheem ib txwm siv los txhim kho adhesion vam khom ntau rau ntawm binder chemistry thiab calendering siab. Txawm li cas los xij, cov txheej txheem no muaj kev txwv thiab tsis hais txog qhov teeb meem tseem ceeb: lub zog qis ntawm cov hlau tsis muaj zog, uas feem ntau muaj cov roj dov thiab oxides, ua rau lawv muaj dej tsis txaus thiab nyuaj rau cov dej los yog cov kuab tshuaj -raws li slurries kom ntub uniformly.
2. Kev Tshawb Fawb Txog Siab -Kev Kho Mob Corona
Kev kho mob Corona yog ib qho cuab yeej technology atmospheric plasma uas siv lub siab -voltage hluav taws xob tawm los ionize huab cua nyob ib puag ncig cov khoom kho. Nyob rau hauv siab -lub zog corona kho tshuab tsim los rau cov roj teeb tsim:
Txheej txheem:Cov ntawv hlau hlau hla dhau ntawm cov menyuam hauv av. Saum toj no, ib qho hluav taws xob txuas nrog lub siab - zaus, siab - lub tshuab hluav taws xob hluav taws xob tsim hluav taws xob hluav taws xob muaj zog. Daim teb no ionizes huab cua ambient (O₂, N₂, H₂O), tsim cov huab ntom ntom ntawm cov ntshav uas muaj ions, electrons, dawb radicals, thiab cov molecules zoo siab (xws li ozone li ozone O₃).
Surface Modification Mechanism:Thaum lub plasma impinges rau ntawm daim tawv nqaij, ob lub ntsiab phenomena tshwm sim:
1. NtoKev Tu Nto:Cov tsiaj muaj zog plasma zoo vaporize thiab tshem tawm cov kab mob microscopic, xws li cov roj rolling organic thiab hmoov av.
2. Surface Activation:Qhov tseem ceeb tshaj, cov plasma qhia txog pawg polar functional (feem ntau yog hydroxyl -OH, carbonyl C=O, thiab carboxyl -COOH) mus rau hauv cov ntawv ci los ntawm cov tshuaj tiv thaiv oxidation. Cov txheej txheem no, hu ua functionalization, mus tas li hloov qhov chaw chemistry.
3. Cov txiaj ntsig tseem ceeb rau roj teeb Electrode Production
Kev koom ua ke ntawm lub siab - lub zog corona tus neeg kho mob ncaj qha rau hauv cov txheej txheej muab cov txiaj ntsig tseem ceeb:
Kev nce siab hauv Surface Energy:Kev taw qhia ntawm pawg polar hloov cov ntawv ci los ntawm qhov qis - zog, tsis yog - nplaum nto mus rau qhov siab - zog, hydrophilic ib qho. Qhov no ua rau txhim kho qhov ntub dej thiab sib kis tau ntawm electrode slurry, ua kom muaj qhov sib xws, pinhole -dawb txheej.
Superior Adhesive zog:Nrog rau kev ntub dej zoo dua thiab kev sib txuas tshuaj ncaj qha los ntawm cov pab pawg ua haujlwm tshiab, kev sib cuam tshuam ntawm cov neeg kho tshuab thiab Van der Waals cov tub rog ntawm qhov sib cuam tshuam tau muaj zog heev. Qhov no ua rau muaj kev sib raug zoo uas ua rau muaj kev ntxhov siab ntawm kev ziab, calendering, thiab ntev - lub sij hawm electrochemical cycling.
Cov txheej txheem ua kom zoo sib xws & Yield:Los ntawm kev muab qhov chaw huv si thiab ua haujlwm tau zoo, kev kho mob corona tshem tawm batch - rau -batch variability tshwm sim los ntawm fluctuating foil quality. Qhov no txo cov nqi seem thiab txhim kho tag nrho cov khoom tsim tawm.
Qhuav, Solvent-Dawb, thiab Instantaneous:Tsis zoo li cov tshuaj primers lossis kev kho cov nplaim taws, kev kho corona yog cov txheej txheem huv. Nws yuav tsum tsis muaj cov kuab tshuaj, ua kom tsis muaj kua dej pov tseg, thiab nws cov nyhuv yog tam sim ntawd, ua rau nws zoo tagnrho rau siab - ceev nruam ntau lawm kab.
Compatibility nrog Advanced Materials:Raws li kev lag luam txav mus rau cov electrodes tuab, silicon-anodes, thiab cov roj teeb uas muaj zog- lub xeev, qhov kev thov rau qhov zoo tshaj plaws interfacial adhesion ua qhov tseem ceeb dua. Siab -kev kho mob corona yog ib qho khoom siv ntau yam hloov tau rau cov khoom siv tshiab no.
4. Kev xav txog kev siv
Txhawm rau kom tau txais txiaj ntsig zoo tshaj plaws ntawm - tus kws kho mob corona, ntau yam yuav tsum tau ua kom zoo dua:
Lub zog ceev:Lub zog siab dua ( ntsuas hauv W / min / m²) ua rau lub plasma denser, ua rau muaj kev ua kom ntau dua. Qhov kev pom zoo yuav tsum tau txiav txim siab kom tsis txhob muaj kev kho mob ntau dhau uas tuaj yeem ua rau kev kho mob nraub qaum lossis me ntsis etching.
Electrode Tsim:Cov txheej txheem los yog segmented electrodes tuaj yeem siv nyob ntawm lub vev xaib dav thiab qhov xav tau rau kev tswj zonal.
Web Speed & Integration:Lub kaw lus yuav tsum tau seamlessly kev koom ua ke rau hauv lub coater uas twb muaj lawm, synchronizing nrog lub web ceev kom ntseeg tau tias kev kho mob zoo ib yam tsis muaj kev cuam tshuam cov kab nro.
Kev Tswj Ozone:Cov kws kho mob niaj hnub no tau nruab nrog ozone destruction units (ODUs) kom muaj kev nyab xeeb decompose cov ozone tsim, ua kom muaj kev nyab xeeb ua haujlwm.
5. Cov lus xaus
Hauv kev sib tw zoo heev ntawm kev tsim roj teeb, ua kom tau txais txiaj ntsig zoo hauv kev ua tau zoo thiab kev ntseeg siab yog qhov tseem ceeb. Siab -kev kho mob corona hais txog qhov tseem ceeb ntawm kev tsim cov fwj dej los ntawm kev tsim vaj tsev cov khoom ntawm cov khoom siv tam sim no ntawm cov qib molecular. Los ntawm kev ua kom tsis muaj qhov tsis zoo ntawm cov txheej txheej thiab cov substrate, nws ncaj qha ua rau cov roj teeb uas muaj peev xwm tuav tau ntau dua, kev pab lub neej ntev dua, thiab txhim kho kev nyab xeeb. Yog li ntawd, nws tsis yog ib qho kev ua haujlwm nkaus xwb tab sis yog ib qho tseem ceeb ntawm kev siv thev naus laus zis rau yav tom ntej ntawm kev cia siab heev.