Kev tsim khoom yooj yim thiab ceev faj rau kev them cov roj teeb lithium

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Onye na-ebubata ọdụ ọkụ nwere ike ibugharị

I. Material systemization kev ua tau zoo lub ntsiab lus thiab cov lus piav qhia thaj chaw thaj chaw (m2 / g): yog hais txog thaj tsam ntawm cov khoom siv pawg loj. (Tsim txoj kev: xam lub ntim argon adsorbed los ntawm cov khoom ntawm chav tsev qhov hnyav).

Particle loj (μm): Cov lus piav qhia ntawm cov khoom siv, hais txog txoj kab uas hla ntawm cov khoom siv. D50 piav qhia qhov nruab nrab particle txoj kab uas hla ntawm cov khoom. Vain Density (G / CM3): Cov khoom siv vibrating qhov loj ntawm qhov loj ntawm chav tsev ntawm txhua yam kev co.

Tsis tas li ntawd, kuj tseem muaj cov khoom siv nws tus kheej, hom tsos, qhov muaj peev xwm tawm, muaj peev xwm ua tau zoo, cov ntsiab lus tsis huv, thiab cov zoo li kuj yog kev txwv ntawm ntau yam ntaub ntawv. Thib ob, ntau yam khoom siv hauv cov khoom siv hluav taws xob thiab nws cov yam ntxwv siv yooj yim 1, tus neeg sawv cev ntawm cov pa roj carbon number case conductive cov neeg ua haujlwm, cov pa roj carbon monoxide tsis zoo, cov khoom siv hluav taws xob zoo, muaj zog adsorption, thaj chaw loj tshwj xeeb, txog 60-100 m2 / g, nws tus kheej tsis muaj peev xwm. Artificial graphite conductive tus neeg saib xyuas, cov conductivity tsawg dua cov pa roj carbon number case, tab sis qhov tshwj xeeb ntawm qhov chaw yog me me, 10-30 mAh / g, uas yog lub peev xwm, txog 290 mAh / g, uas yog qhov zoo dua.

Kuj tseem muaj cov graphite ntuj, nyob ntawm nws tus kheej conductivity, nws kuj tseem siv tau los ua cov khoom siv hluav taws xob, tab sis kuj yog cov khoom siv hluav taws xob tsis zoo vim muaj peev xwm siab. Thiab nano-scale carbon fiber, zoo conductivity, zoo ua hauj lwm, tab sis tus nqi yog kim. 2, cov khoom siv electrode feem ntau yog lithium ion thib ob roj teeb, thiab lithium cobaltate, nws tus kheej gram peev 135-150 mAh / g, compact ceev yog 3.

65-4.00 g / cc, LiCoO2 yog lithium ion roj teeb uas muaj qhov zoo electrode muaj qhov qhib qhov hluav taws xob qhov siab. Siab tshaj lub zog (theoretical tshaj lub zog 1068Wh / kg, theoretical muaj peev xwm 274mAh / g), lub neej voj voog ntev, tawm ceev ceev, tab sis tus nqi kim.

Cov khoom siv hluav taws xob tsis zoo: cov khoom siv graphite, nruab nrab theem carbon microsphere, ntuj graphite hloov kho, thiab lwm yam. Ordinary dag graphite: gram muaj peev xwm 290-310mAh / g, compaction 1.45-1.

55 g / cc. Intermediate theem carbon microspheres: gram muaj peev xwm 310-320mAh / g, compaction 1.55-1.

65 g / cc. Ntuj graphite hloov kho: gram muaj peev xwm 320-340mAh / g, compact 1.55-1.

65 g / cc. 3, cov kua nplaum feem ntau muaj npe nrov rau PVDF, cov tshuaj npe yog polyvinylidene fluoride, thiab qhov loj ntawm nws cov viscosity cuam tshuam los ntawm qhov hnyav molecular, pab pawg ua haujlwm thiab cov txheej txheem ua haujlwm. Feem ntau, hais txog tib txoj kev ua haujlwm, tib txoj haujlwm ua haujlwm, qhov hnyav dua molecular, qhov siab dua nws cov viscosity, tab sis nrog qhov nce hauv viscosity, nws qhov kev sib haum xeeb ntawm slurry yog ntau tshaj tawm.

CMC thiab SBR yog cov kua nplaum siv hauv cov dej hauv dej. CMC (carboxymethylcellulose): dawb los yog micro-daj hmoov, nws tus kheej muaj cov khoom sib txuas, tab sis nyob rau hauv aqueous system, nws feem ntau siv los yog dispersion khoom thiab SBR. SBR (butadous-blene-blewell mis): siv dawb lub teeb xiav emulsion kua, polymer compound, tov nrog CMC, thiab nws cov kev sib txuas ua haujlwm zoo dua.

Thib peb, lub roj teeb ua haujlwm tau zoo kom ua tau raws li ntau yam ntawm cov khoom siv, ua kom nws ua haujlwm zoo, tsis txhob ncav cuag cov xwm txheej hauv qab no: 1, cov khoom siv nws tus kheej cov qauv, qhov loj ntawm cov particle loj, granules Smoothness ntawm cov tsos; lub teeb tawm ntawm cov active molecules nyob rau hauv lub electrode; 3, active molecule thiab conductive tus neeg saib xyuas zoo; 4, smoothly coj lub network; 5, thiab electrolyte zoo infiltration degree; 6, rau txhua tus txheej txheem zoo rau cov khoom siv. Thib plaub, nplawm txoj kev thiab ua ntu 1, do kua nplaum PVDF: Raws li qhov concentration yuav tsum tau teeb tsa, tus nqi ntawm PVDF qhuav hmoov raug xa mus rau, muab tso rau hauv qhov cub qhuav, ci 60-120 min ntawm 70-80 degrees, thiab tom qab ntawd hu ua NMP Hauv lub thawv nplaum, lub thawv yog tsau, thiab PVDF ntxiv cov hmoov qhuav kom txog thaum cov hmoov sib tov qhuav, thiab PVDF ntxiv cov hmoov qhuav kom qhuav. ntxiv, lub thawv ntim tau ntim tau, nplawm 3-4h, kom txog thaum nws tau yaj tag, maj mam do Seal rau lub sijhawm kom tshem tawm cov npuas hauv cov roj hmab los yog ncuav lawv cov tshuaj rau hauv lub thawv ruaj. Cov roj hmab no muaj txiaj ntsig zoo, nws cov concentration feem ntau yog 12%.

CMC: Cov txheej txheem cov kauj ruam yog tib yam, tab sis cov kev daws teeb meem yog dej-raws li, cov kuab tshuaj yog deionized dej es tsis yog NMP, thiab cov concentration ntawm cov tshuaj feem ntau yog 2-3.5%. 2, calcouting khoom coj cov khoom mus rau lub tshuab nqus tsev qhov cub rau 4 h ntawm 160 degree lub tshuab nqus tsev qhov cub, thiab ces do, thiab ces do, cov txheej txheem yog raws li nram no: 2.

1 Ntxiv ib tus neeg sawv cev SP, thiab ntub nws nrog ib qho nyiaj txaus NMP, thiab do 10-20min. 2.2 Ntxiv lwm cov khoom siv hluav taws xob rau thawj kauj ruam, do lub 10-20 min.

2.3 Ntxiv cov khoom nquag thiab cov pos hniav, nplawm nrog ib rab diav, tom qab ntawd nplawm nws ntawm lub stirrer ntawm kev kub ceev kom txog rau thaum nws pom tau tias yuav du thiab tig mus rau lub agitator rau 2 h, thiab cov slurry yog yuav tsum tau rau kev kub ceev Thick do, ua tiav lub hom phiaj ntawm dispersion). 2.

4 Kho nws kom khov, maj mam do 30 feeb kom tshem tawm cov pa. 2.5 Tshem tawm cov slurry, lim.

3, stirred cov khoom 3.1 Ntxiv ib tug conductive neeg sawv cev SP, ntub nws nrog ib tug me me npaum li cas ntawm NMP, stirred rau 10-20min. 3.

2 Ntxiv lwm cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab CMC thiab qhov tsim nyog ntawm H2O, nplawm nrog ib rab diav, thiab tom qab ntawd nplawm ntawm kev kub ceev ntawm cov stirrer kom txog thaum pom tias cov slurry nto yog du, thiab ces tsau rau do stirrer ntawm lub ntaus ntawv 1.2-1.5H (cov kauj ruam no yuav tsum tau ib tug high speed thickening kom tiav lub hom phiaj ntawm dispersion).

3.3 Ntxiv qhov tsim nyog ntawm H2O rau qib thib ob. 3.

4 Ntxiv ib qho SBR txaus rau hauv cov kauj ruam saum toj, nplawm yog yaj tag hauv SBR, txog 30 min. (Yuav tsum tau kub thiab qeeb qeeb thaum ntxiv SBR) 3.5 Ntxiv cov dej slurry 10-15% NMP (muaj NMP ntxiv rau hauv kauj ruam 1), maj mam do cov npuas, 30 feeb.

3.6 Tshem tawm cov slurry, lim. V.

Cov teeb meem tshwm sim hauv kev sim, daws qhov teeb meem thiab cuam tshuam 1, lub hom phiaj, lub sijhawm thiab qhov kub thiab txias ntawm qhov ci. Cov khoom siv hluav taws xob: kom tshem tawm cov dej noo, roj thiab plua plav, feem ntau ci rau 160 degrees 4h. Glue: Ib qho tseem ceeb deflash, ci tej yam kev mob feem ntau 70-80 degrees ci 60-120min.

Oxic acid: ntxiv rau cov dej noo thiab cov dej crystalline, feem ntau ci rau 70-80 degrees rau 30-60 min. 2, lub hauv paus ntsiab lus ntawm kev siv cov khoom siv hluav taws xob. Cov conductors feem ntau sib tov, siv txoj kev rho tawm.

3. Cov nyhuv ntawm tus neeg sawv cev conductive ntxiv rau lub roj teeb. Cov neeg siv hluav taws xob muaj peev xwm cuam tshuam tsawg dua, lub voj voog, lub platform, siab thiab tsis tshua muaj qhov hluav taws xob tawm hluav taws xob thiab kev tso tawm tam sim no, kev nyab xeeb, kev ua haujlwm sab hauv, thiab lwm yam.

4, qhov sib txawv ntawm qhov sib ntxiv ntawm cov khoom xyaw thiab qhov zoo thiab qhov tsis zoo. Conductant thiab nplaum ntxiv ib ntus, oxalic acid ntxiv sequence, NMP ntxiv ib ntus hauv cov khoom aqueous, thiab lwm yam. 5, kua nplaum ntxiv rau kev ua haujlwm ntawm lub roj teeb.

6. Dab tsi yog qhov cuam tshuam ntawm kev ua kom txias sai thaum cov khoom xyaw. 7.

Yuav ua li cas goperate thiab ntxiv thiab tus nqi ntawm oxalic acid nyob rau hauv lub oily tsis zoo configuration thiab oxalic acid. Muaj ob lub hom phiaj ntawm gaseous cua sov: tshem tawm cov txheej saum npoo oxide ntawm cov ntawv ci tooj liab thiab tsim cov corrosive zawj rau ntawm cov ntawv ci tooj liab, thiab cov xim ntawm cov slurry ntawm cov ntawv ci tooj liab. Nws siv feem ntau yog 2% ntawm PVDF.

8, CMC, SBR Siv thiab ceev faj hauv dej. Ob leeg CMC thiab SBR muaj cov nplaum, siv hauv slurry, qhov twg CMC tseem ceeb nyob rau lub sijhawm no, thiab SBR tseem ceeb rau kev sib txuas. 9.

Yuav ua li cas ntxiv NMP thiab siv thaum cov dej faib tsis zoo. Ntxiv NMP rau hauv aqueous tsis zoo electrode yog ib qho tseem ceeb los ua kom qhov nro ntawm cov ntawv ci tsis zoo, ua rau lub rooj slurry zoo dua, thiab tiv thaiv kom tsis txhob muaj cov tawv nqaij. Txawm li cas los xij, thaum pub mis, kev saib xyuas yuav tsum tau muab sau tseg tias SBR thiab NMP yog cov organic molecular siab, ceev ceev los yog kub kub tuaj yeem hnov ​​​​mob nyob rau hauv ob cov ntaub ntawv, thiab jelly-shaped thiab nrog gases.

10, kev sib raug zoo ntawm cov khoom, viscosity thiab gel hom. 11. Qhov cub kub li cas thaum rub.

Lub pulp yog qis heev kom txo qis cov hmoov qis qis, qhov kub thiab txias yog siab dhau, cov hmoov nplej yog cov hmoov nplej, los yog ib qho tseem ceeb tawg, thiab muaj kev taug kev. 12, qhov ceev ntawm lub puls launched yog tsis sib npaug los yog loj. Cov Slurry nto tsis sib xyaw ua ke tsis sib faib ua ob peb sab nraud, cov khoom siv ntom ntom nti, yog qhov tsis ruaj khov, cov khoom siv ua kom ruaj khov, cov khoom siv ua kom tsis ruaj khov, cov khoom siv ua kom ruaj khov, cov khoom siv ua kom ruaj khov, yog qhov tsis ruaj khov, lub ntom ntom ntom ntom nti

13, debugging cov menyuam siab. Nyob rau hauv ob txoj kev, ib tug yog los ntawm microstructure ntawm hais, qhov thib ob yog los ntawm cov tsos ntawm cov electrode (cov pos hniav, hmoov, wrinkles). 14, thaum lub sijhawm tsim khoom thiab tom qab kev tsim cov yeeb yaj kiab tom qab kev tsim khoom.

Lub hom phiaj ntawm tus ncej ci yog tshem tawm cov dej noo, tab sis qhov kub thiab lub sij hawm tswj tau, thiab qhov kub thiab txias ntawm lub ntsej muag ci yog 130 degrees thaum lub sij hawm tsim khoom, thiab qhov ci ci ntawm zaj duab xis yog 90 degrees. 15, kev cia khoom ntawm tus ncej. Tom qab cov yeeb yaj kiab tiav lawm, tus ncej yog khaws cia rau hauv qhov chaw qhuav qhuav.