Kev paub txog cov khoom xyaw
Ua ntej, cov lus ntawm lub electrode:
1, qhov muaj pes tsawg leeg zoo nkauj:
Cov muaj pes tsawg leeg ntawm cov electrode: a, lithium cobaltate: zoo electrode khoom, lithium ion source, rau lub roj teeb los txhim kho lub lithium qhov chaw.
b. Tus neeg sawv cev cwj pwm: Txhim kho txoj kev ua kom zoo ntawm daim ntawv thaij (electrode sheet) thiab txhawm rau kev siv hluav taws xob coj los ntawm cov khoom siv zoo electrode. Qhov nqus ntawm cov kua hluav taws xob ntawm cov kua roj electrode yog nce, cov tshuaj tiv thaiv yog nce, thiab cov polarization txo.
c. PVDF phau ntawv: Lithium cobaltate, ib tus neeg saib xyuas kev sib txuas thiab ib daim ntawv txhuas los yog ib qho txhuas txhuas ua ke ua ke.
d. Cov hmoov txhuas hniav zoo: Ua los ntawm cov ntawv txhuas los sis cov xim txhuas.
2, muaj pes tsawg leeg ntawm qhov tsis zoo electrode:
a, graphite: tsis pom zoo electrode khoom siv, uas yog cov khoom tseem ceeb ntawm qhov tsis zoo ntawm electrode; feem ntau yog muab faib ua ob qho loj ntawm cov duab graphite thiab khoom neeg tsim graphite.
b. Tus neeg saib xyuas tus cwj pwm: kho cov ntaub ntawv ntawm cov ntawv tsis zoo thiab rho nyiaj rau kev siv hluav taws xob ntawm cov khoom siv tsis zoo electrode. Txhim kho qhov tob tob thiab kev siv. Tiv thaiv cov cim ntawm cov dendrites. Cov kua nqus peev ntawm cov khoom siv hluav taws xob siv tau los ua kom cov kev sib tov ua ke thiab txo cov kev tuaj yeem tawg. (Yuav xaiv raws li graphite particle loj faib rau lossis tsis).
c. Additives: txo cov kev ua tsis tshua mob, txhim kho adhesion, nce slurry viscosity, thiab tiv thaiv slurry nag lossis daus.
d. Aqueous binder: Bonding graphite, tus neeg saib xyuas kev sib txuas, kev siv tshuaj thiab khib tooj liab los yog tooj liab mesh ua ke.
e, tsis muaj hmoov txhuas (lead): ua los ntawm cov ntawv ci los sis cov nplais nickel.
Thib ob, lub hom phiaj ntawm cov khoom xyaw: txoj kev batching ua tau ntau yam hauv cov slurry yog sib xyaw ua ke raws li tus qauv ntsuas, npaj rau hauv lub slurry, thiaj li yuav pab txhawb cov xim tsis zoo, los xyuas kom meej lub taub hau ntawm lub npoo daim. Cov khoom xyaw feem ntau muaj tsib kev ua xyaw, namely: pretreatment, blending, wetting, dispersion thiab flocculation ntawm cov ntaub ntawv raw.
Thib peb, txoj ntsiab cai ntawm cov khoom xyaw:
(A), lub hauv paus ntsiab lus ntawm kev noj qab haus huv zoo
1. Lub cev nqaij thiab tshuaj ntawm cov ntaub ntawv raw.
(1) Lithium cobaltate: non-polar substance, cov duab tsis zoo, particle size D50 feem ntau yog 6-8 μm, dej ntsiab lus ≤ 0.2%, feem ntau alkaline, PH muaj txog 10-11.
Lithium manganate: non-polar substance, irregular shape, particle size D50 yog feem ntau 5-7 μm, dej ntsiab lus ≤ 0.2%, feem ntau weakly alkaline, PH nqi yog txog 8.
2) Tus neeg sawv cev cwj pwm: cov khoom uas tsis yog hnav kub, cov txiv hmab txiv ntoo, cov ntsiab lus dej 3-6%, roj nqus cov nqi ~ 300, qhov loj me me feem ntau yog 2-5 μm; feem ntau yog cov pa roj carbon dub, cov roj qab dub, graphite mis nyuj, thiab lwm yam. Nyob hauv daim ntaub ntawv sau ua ntaub ntawv siab, cov xim dub thiab graphite emulsion feem ntau raug xaiv; feem ntau tsis nruab nrab.
(3) PVDF phau ntawv tuav: non-polar substance, saw, molecular weight ranges ntawm 300,000 rau 3,000,000; molecular weight decreases tom qab dej nqus, viscosity yog deteriorated.
(4) NMP: ib qho kua qaub (weakly) ncov qis siv los ua kom yaj / swell PVDF thiab ua rau lub dilute slurry.
3. Sib sib tov ntawm cov ntaub ntawv raw:
(1) Kev tshem tawm ntawm phau ntawv (raws li tus qauv concentration) thiab kev kho cua sov.
(2) Lub lithium cobaltate thiab kev sib txuas lus hauv lub pob milling: Lub hmoov yog pib sib xyaw, thiab cov neeg ua hauj lithium cobaltate thiab cov neeg ua hauj lwm sib raug zoo ua ke los txhim kho agglomeration thiab conductivity. Tom qab ua formulated rau hauv slurry, nws tsis yog muab faib rau hauv phau ntawv, thiab lub pob milling lub sij hawm feem ntau yog li 2 xuab moos; yuav kom tsis txhob tov impurities, ib pob agate feem ntau siv los ua ib pob zeb meson.
4. Dispersion thiab qe cov hmoov qhuav:
(1) Ntsiab Lus: Cov hmoov av muab tso rau saum cua. Raws li lub sij hawm dhau mus, ib feem ntawm huab cua yuav tsum adsorbed rau ntawm qhov khoom. Tom qab lub fwj pob ntxiv, cov kua thiab cov roj pib los sib tw rau cov khoom nto; Yog tias cov khoom thiab cov pa adsorbed Cov kua muaj zog dua cov kua, thiab cov kua tsis ntub cov khoom; yog tias cov kua hluav taws xob muaj zog tawm suab yog qhov muaj zog dua cov roj cov adsorption quab yuam, cov kua tau ntub cov khoom thiab ua kom tsis muaj roj. Thaum lub kaum pob ntub yog ≤ 90 degrees, qhov khov yog wetted. Thaum lub kaum ntse ntse yog> 90 degrees, cov khib nyiab tsis wetted. Txhua tus tswv cuab ntawm cov khoom siv zoo electrode tuaj yeem muaj dej khov los ntawm cov tog raj, ces cov hmoov zoo zoo kuj yooj yim.
(2) Cov nyhuv ntawm cov dispersion txoj kev ntawm dispersion:
A, sawv kev (ntev lub sij hawm, cov nyhuv tsis zoo, tab sis tsis ua rau tus thawj qauv ntawm cov khoom);
B. Txoj kev khib nyiab; kev sib hloov lossis kev sib hloov thiab kev sib tw (lub sijhawm luv luv, kev ua haujlwm zoo, tab sis nws yuav ua rau cov khoom ntawm tus kheej).
1. Cov cawv ntawm cov nplaum nplaum rau ntawm qhov ceev ceev. Cov paddles agitating feem ntau muaj xws li ib tug zoo nkauj, ib hom npuj npaim, ib qho zoo nkauj, ib hom paddle, iav zoo, thiab cov zoo li. Feem ntau, cov kab npauj npaim, npauj npaim, thiab duav paddles yog siv rau thawj theem ntawm cov khoom los yog cov khoom xyaw uas nyuaj rau disperse; lub ntsej muag khoob thiab cov iav siv los muab faib rau lub xeev tsis muaj zog, thiab qhov tshwm sim zoo.
2. Cov nyhuv ntawm cov nplawm ceev ntawm qhov ceev ceev. Feem ntau hais lus, qhov siab dua tus nplawm ceev, qhov ceev ceev qhov ceev ceev, tiam sis qhov ntau dua qhov kev puas tsuaj rau cov ntaub ntawv nws tus kheej thiab cov khoom siv.
3. Cov nyhuv ntawm concentration ntawm tus ceev dispersion. Feem ntau, qhov me me qhov slurry concentration, ceev qhov ceev ceev, tab sis dhau nyias nyias yuav ua rau pov tseg ntawm cov khoom thiab cov hnyuv ntxwm ntawm cov nag slurry.
4. Cov nyhuv ntawm cov khoom siv dag zog. Qhov ntau dua qhov concentration, qhov ntau dua qhov zog softening thiab lub siab zog tsevneeg; qhov tsawg dua qhov concentration, qhov me zog qhov ua tau lub zog.
5. Cov nyhuv ntawm lub tshuab nqus tsev rau ntawm qhov ceev ceev. Lub tshuab nqus tsev yog qhov zoo rau cov pa tawm ntawm cov khoom sib txawv thiab qhov saum npoo, thiab qhov teeb meem ntawm cov kua adsorption yog txo; qhov teeb meem ntawm uniformly dispersing cov khoom nyob rau hauv qhov mob ntawm tag nrho poob los yog txo lub ntiajteb txawj nqus yuav zoo heev txo.
6. Cov nyhuv ntawm qhov kub ntawm qhov ceev ceev. Nyob rau hauv ib qho kev ntsuas kub, cov slurry muaj zoo fluidity thiab yog yooj yim los disperse. Kub slurry yog yooj yim mus rau crust, thiab fluidity ntawm heev txias slurry yuav raug heev txo.
7. Dilute. Lub slurry yog hloov mus rau ib tug haum concentration rau chaw coating.