Kev nce qib hauv kev tshawb fawb txog thermal poob ntawm kev them nyiaj lithium roj teeb

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Προμηθευτής φορητών σταθμών παραγωγής ενέργειας

Paub meej: Cov ntsiab lus ntawm qhov kev nce qib tshiab thiab kev tsim kho tshiab rau kev tshawb nrhiav roj teeb lithium-ion siab. Ib qho tseem ceeb los ntawm qhov kub thiab txias ruaj khov ntawm electrolytes thiab electrodes, qhov ua rau thermal instability ntawm lithium ion roj teeb thiab lawv cov txheej txheem tau qhia meej tias cov khoom lag luam lithium-ion roj teeb uas twb muaj lawm yog qhov tsis txaus ntawm qhov kub thiab txias, thov kom tsim cov kub electrolytes, zoo thiab tsis zoo hloov kho thiab kev tswj cov roj teeb sab nraud, thiab lwm yam. tsim kom muaj kev ruaj ntseg lithium-ion roj teeb.

Outlook ntawm kev txhim kho cov kev cia siab ntawm kev txhim kho kev nyab xeeb ntawm lithium-ion roj teeb. 0 Kev Taw Qhia Cov roj teeb lithium ion dhau los ua tus neeg sawv cev ntawm hom tshiab ntawm lub zog vim nws cov nqi qis, kev ua haujlwm siab, lub zog siab, thiab ib puag ncig ntsuab, dav siv hauv 3C cov khoom lag luam, lub zog hluav taws xob thiab cov cuab yeej hluav taws xob. Nyob rau hauv xyoo tas los no, vim ib puag ncig muaj kuab paug intensification thiab lub teb chaws txoj cai kev taw qhia, hluav taws xob tsheb raws li hluav taws xob tsheb lag luam tau nce qhov kev thov rau lithium-ion roj teeb, nyob rau hauv tus txheej txheem ntawm kev tsim high-power lithium-ion roj teeb systems, roj teeb teeb meem kev nyab xeeb tau nyiam nws cov kev saib xyuas, cov teeb meem uas twb muaj lawm urgently yuav tsum tau daws ntxiv.

Qhov kub thiab txias hloov ntawm lub roj teeb system yog txiav txim los ntawm qhov tshwm sim ntawm tshav kub thiab faib ob yam. Qhov tshwm sim ntawm tshav kub ntawm lithium ion roj teeb tseem ceeb yog tshwm sim los ntawm cov tshuaj tiv thaiv ntawm thermal decomposition thiab cov khoom siv roj teeb. Txo cov cua sov ntawm lub roj teeb system thiab txhim kho cov txheej txheem ntawm kev tiv thaiv kev kub ntxhov, lub roj teeb system muaj kev nyab xeeb.

Thiab cov khoom siv me me xws li cov xov tooj ntawm tes, lub laptop roj teeb muaj peev xwm feem ntau tsawg dua 2AH, thiab lub zog-hom lithium-ion roj teeb muaj peev xwm siv hauv tsheb fais fab feem ntau ntau dua 10ah, thiab qhov kub hauv cheeb tsam feem ntau siab dua 55 ° C thaum lub sijhawm ua haujlwm ib txwm, thiab qhov kub thiab txias yuav ncav cuag 300 ° C, Hauv qab kub lossis loj tus nqi them thiab tshem tawm cov kev mob tshwm sim, cov tshuaj tiv thaiv kab mob tshwm sim. nws thiaj li ua rau thermal tawm ntawm kev tswj thiab roj teeb combustion lossis tawg [3]. Ntxiv nrog rau nws tus kheej cov tshuaj teb cov ntsiab lus, qee tus neeg muaj lub voj voog luv luv los ntawm overheating, overtaking, thiab mechanical cuam tshuam, qee yam khoom siv dag zog kuj tuaj yeem ua rau muaj qhov tshwm sim ntawm lithium-ion roj teeb ua rau muaj kev nyab xeeb. Yog li ntawd, nws yog ib qho tseem ceeb rau kev kawm thiab txhim kho qhov kub thiab txias ntawm lithium-ion roj teeb.

1 thermal out-of-control ua rau tsom xam ntawm thermal tawm ntawm kev tswj ntawm lithium-ion roj teeb yog ib qho tseem ceeb vim hais tias lub sab hauv kub ntawm lub roj teeb nce. Tam sim no, feem ntau siv electrolyte system nyob rau hauv kev lag luam lithium-ion roj teeb yog ib tug tov carbonate tov ntawm LiPF6. Xws li cov kuab tshuaj muaj siab volatility, tsawg flash point, heev yooj yim rau combust.

Thaum lub sab hauv luv Circuit Court tshwm sim los ntawm kev sib tsoo los yog deformed, tus nqi loj thiab tawm thiab overtake, yuav muaj cua sov ntau, uas ua rau nce roj teeb kub. Thaum ncav cuag qhov kub thiab txias, cov tshuaj tiv thaiv decomposition yuav ua rau lub thermal tshuav ntawm lub roj teeb puas. Thaum cov cua sov tso tawm los ntawm cov tshuaj tiv thaiv tsis tuaj yeem khiav tawm hauv lub sijhawm, nws yuav ua rau muaj kev loj hlob ntawm cov tshuaj tiv thaiv, thiab ua rau muaj kev kub ntxhov ntawm tus kheej.

Lub roj teeb kub nce siab heev, uas yog, "thermal tawm ntawm kev tswj", nws thiaj li ua rau cov roj teeb hlawv, thiab txawm tias qhov tawg tshwm sim tiag tiag. Feem ntau, qhov ua rau thermal tawm ntawm kev tswj ntawm lithium-ion roj teeb yog qhov tseem ceeb hauv thermal instability ntawm electrolyte, nrog rau thermal instability ntawm electrolyte thiab zoo thiab tsis zoo electrode coexistence. Tam sim no, los ntawm ib qho loj, kev nyab xeeb ntawm lithium-ion roj teeb yog ib qho tseem ceeb los ntawm kev tswj xyuas sab nraud thiab sab hauv tsim los tswj qhov kub thiab txias, voltage, thiab huab cua siab kom ua tiav cov hom phiaj kev nyab xeeb.

2 Txhim kho thermal tawm ntawm kev tswj lub tswv yim 2. Kev tswj sab nraud 1) PTC (zoo kub coefficient) tivthaiv: Nruab PTC tivthaiv hauv lithium ion roj teeb, uas txiav txim siab lub siab thiab kub hauv lub roj teeb, thiab thaum lub roj teeb sov los ntawm overcharge, lub roj teeb yog 10 Qhov kev tiv thaiv nce ntxiv rau qhov txwv tam sim no, thiab qhov hluav taws xob ntawm qhov zoo thiab qhov tsis zoo yog txo kom muaj kev ruaj ntseg voltage kom paub txog kev tiv thaiv tsis siv neeg ntawm lub roj teeb. 2) Kev tawg-pov thawj valve: Thaum lub roj teeb loj dhau vim qhov txawv txav, qhov tawg-pov thawj valve yog deformed, uas yuav muab tso rau hauv lub roj teeb kom txuas, nres them.

3) Cov khoom siv hluav taws xob: 2 ~ 4 lub roj teeb pob tuaj yeem tsim hluav taws xob tsim hluav taws xob lithium ion tiv thaiv, tiv thaiv overcharge thiab over-discharge, tiv thaiv kev nyab xeeb kev raug mob, txuas ntxiv roj teeb lub neej. Tau kawg, cov kev tswj hwm sab nraud no muaj qee yam cuam tshuam, tab sis cov khoom siv ntxiv no tau ntxiv qhov nyuaj thiab cov nqi tsim khoom ntawm lub roj teeb, thiab lawv tsis tuaj yeem daws qhov teeb meem ntawm kev nyab xeeb ntawm roj teeb. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tsim kom muaj kev tiv thaiv kev ruaj ntseg hauv nruab nrab.

2.2 Kev txhim kho cov electrolyte electrolyte electrolyte lithium ion roj teeb, qhov xwm ntawm electrolyte ncaj qha txiav txim siab txog kev ua haujlwm ntawm lub roj teeb, lub peev xwm ntawm lub roj teeb, kev ua haujlwm kub, kev ua haujlwm ntawm lub voj voog thiab kev nyab xeeb yog qhov tseem ceeb. Tam sim no, kev lag luam lithium-ion roj teeb electrolytic tov tshuab, cov khoom siv dav tshaj plaws yog LIPF6, vinyl carbonate thiab linear carbonate.

Lub hauv ntej yog ib qho tseem ceeb ntawm cov khoom, thiab lawv cov kev siv kuj muaj qee qhov kev txwv ntawm cov roj teeb ua haujlwm. Nyob rau tib lub sij hawm, ib tug loj npaum li cas ntawm boiling dej, tsawg flash point ntawm carbonate hnyav yog siv nyob rau hauv lub electrolyte, uas yuav nyob rau hauv qis kub. Flash, muaj kev nyab xeeb loj heev.

Yog li ntawd, ntau tus kws tshawb fawb sim txhim kho cov txheej txheem electrolyte kom txhim kho kev nyab xeeb ntawm electrolytes. Nyob rau hauv rooj plaub uas lub cev tseem ceeb ntawm cov khoom siv roj teeb (xws li cov khoom siv electrode, cov khoom siv diaphragm, cov khoom siv electrolyte) tsis hloov nyob rau lub sijhawm luv luv, kev ruaj ntseg ntawm cov electrolyte yog ib qho tseem ceeb los txhim kho kev nyab xeeb ntawm lithium ion roj teeb. 2.

2.1 Functional additive function additives muaj tsawg npaum li cas, tsom feature. Ntawd yog, nws tuaj yeem txhim kho qee yam kev ua haujlwm macroscopic ntawm lub roj teeb yam tsis hloov cov txheej txheem ntau lawm yam tsis hloov lossis tsis muaj nqi roj teeb tshiab.

Yog li ntawd, muaj nuj nqi additives tau dhau los ua qhov chaw kub hauv hnub no lub lithium-ion roj teeb, uas yog ib txoj hauv kev zoo tshaj plaws uas tam sim no yog cov tshuaj tiv thaiv kab mob zoo tshaj plaws ntawm lithium-ion roj teeb electrolyte. Qhov yooj yim ntawm kev siv cov khoom siv ntxiv yog los tiv thaiv lub roj teeb kub ntawm qhov siab dhau lawm thiab lub roj teeb voltage tsuas yog txwv rau kev tswj ntau yam. Yog li ntawd, tus tsim ntawm cov additives kuj yog txiav txim los ntawm qhov kev xav ntawm qhov kub thiab txias peev xwm.

Nplaim retardant additive: Cov nplaim retardant additive kuj yuav muab faib ua organic phosphorus nplaim retardant additives, ib tug nitrogen-muaj cov nplaim retardant additive, ib tug silicon-raws li nplaim retardant additive, thiab ib tug composite nplaim retardant additive. 5 pawg tseem ceeb. Organic phosphorescell-flame retardant: Ib qho tseem ceeb suav nrog qee cov alkyl phosphate, alkyl phosphite, fluorinated phosphate, thiab phosphate nitrile compounds.

Cov nplaim retardant mechanism yog qhov tseem ceeb rau cov saw hlau cov tshuaj tiv thaiv ntawm cov nplaim hluav taws xob molecules cuam tshuam nrog hydrogen dawb radicals, tseem hu ua dawb radical capture mechanism. Additive gasification decomposition tso tawm phosphorus-muaj cov dawb radicals, lub peev xwm ntawm cov dawb radicals txiav tawm cov tshuaj tiv thaiv kab mob. Phosphate nplaim retardant: Tseem ceeb phosphate, triethyl phosphate (TEP), tributyl phosphate (TBP), thiab lwm yam.

Phosphate nitrile compound xws li hexamethyl phosphazene (HMPN), alkyl phosphite xws li trimethyl phosphite (TMPI), peb - ​​(2,2,2-trifluoroethyl), phosphite (TT-FP), fluorinated acid ester, xws li peb-(2,2,2-trifluoroethyl) (FPT) Di-(2,2,2-trifluoroethyl)-methyl phosphate (BMP), (2,2,2-trifluoroethyl) - diethyl phosphate (TDP), phenylphosphate (DPOF), thiab lwm yam. yog ib tug zoo nplaim retardant additive. Cov phosphate feem ntau muaj cov viscosity loj heev, tsis zoo electrochemical stability, thiab qhov sib ntxiv ntawm cov nplaim hluav taws kuj muaj qhov cuam tshuam tsis zoo rau cov ionic conductivity ntawm electrolyte thiab cov kev rov qab ntawm cov electrolyte thaum nce lub refractiveness ntawm electrolyte.

Nws yog feem ntau: 1 carbon cov ntsiab lus ntawm pawg alkyl tshiab; 2 aromatic (phenyl) pawg moiety hloov alkyl pawg; 3 tsim ib tug cyclic qauv phosphate. Organic halogenated khoom (halogenated hnyav): organic halogenic nplaim retardant yog ib qho tseem ceeb rau kev mob khaub thuas mob khaub thuas. Tom qab H hloov los ntawm F, nws lub cev lub zog tau hloov pauv, xws li txo qis hauv melting point, txo viscosity, txhim kho cov tshuaj thiab electrochemical stability, thiab lwm yam.

Organic halogenic nplaim retardant yog ib qho tseem ceeb xws li fluorocyclic carbonates, fluoro-chain carbonates thiab alkyl-perfluorodecane ether, thiab lwm yam. OHMI thiab lwm qhov sib piv fluororethyl ether, fluoride-muaj fluoride compounds pom tias qhov sib ntxiv ntawm 33.3% (ntim feem) 0.

67 mol / lliclo4 / Ec + DEC + PC (ntau npaum li cas 1: 1: 1) electrolyte muaj lub siab flash point ntau dua, qhov txo qis muaj peev xwm ntau dua li cov organic hnyav EC, DEC thiab PC, uas tuaj yeem tsim SEI zaj duab xis rau saum npoo ntawm lub ntuj graphite, txhim kho thawj tus nqi thiab tso tawm ntawm Cullen efficiency thiab paug muaj peev xwm. Cov tshuaj fluoride nws tus kheej tsis muaj kev siv cov dawb radical capture muaj nuj nqi ntawm cov nplaim retardant uas tau piav saum toj no, tsuas yog kom dilute siab volatile thiab flammable co-solvents, yog li tsuas yog lub ntim piv nyob rau hauv cov electrolyte feem ntau yog (70%) Thaum cov electrolyte tsis yog flammable. Composite nplaim retardant: Cov nplaim hluav taws sib txuas tam sim no siv hauv cov electrolyte muaj PF compound thiab NP-chav kawm compound, cov neeg sawv cev muaj ib qho tseem ceeb hexamethylphosphoride (HMPA), fluorophosphate, thiab lwm yam.

nplaim retardant exerts nplaim retardant nyhuv los ntawm synergistic siv ob nplaim retardant ntsiab. FEI et al. Tawm tswv yim ob NP nplaim hluav taws retardants MEEP thiab MEE, thiab nws cov qauv molecular tau qhia hauv daim duab 1.

Licf3SO3 / MeEP :PC = 25:75, cov electrolyte tuaj yeem txo cov nplaim taws ntawm 90%, thiab cov conductivity tuaj yeem ncav cuag 2.5 × 10-3S / cm. 2) Overcharged additive: Ib qho kev tshwm sim tshwm sim thaum lub roj teeb lithium-ion overcharged.

Cov electrolyte tivthaiv (tseem ceeb yog cov kuab tshuaj) inveraffling nto ntawm oxidative decomposition cov tshuaj tiv thaiv nyob rau hauv lub nto ntawm lub zoo electrode, cov roj yog generated thiab tus nqi ntawm tshav kub tso tawm, uas ua rau kom lub internal siab ntawm lub roj teeb thiab kub nce, thiab kev ruaj ntseg ntawm lub roj teeb raug cuam tshuam loj heev. Los ntawm lub hom phiaj mechanism, lub overchaul tiv thaiv additive yog ib qho tseem ceeb rau oxidative stripping fais fab-hom thiab ob hom hluav taws xob polymerization hom. Los ntawm hom tshuaj ntxiv, nws tuaj yeem muab faib ua lithium halide, metallocene compound.

Tam sim no, ib qho overchaled ntxiv ntxiv adaprase (BP) thiab cyclohexylbenzene (CHB) ntawm redox anti-overchard additives yog lub hauv paus ntsiab lus thaum lub charger voltage tshaj qhov qub txiav tawm voltage, cov additive pib ntawm qhov zoo electrode. Cov tshuaj tiv thaiv oxidation, cov khoom oxidation diffuses rau qhov tsis zoo electrode, thiab txo cov tshuaj tiv thaiv tshwm sim. Oxidation yog kaw ntawm qhov zoo thiab tsis zoo ncej, nqus cov nqi ntau dhau.

Nws cov tshuaj sawv cev muaj ib tug ferrocene thiab nws derivative, ferrid 2,2-pyridine thiab ib tug complex ntawm 1,10-nyob ib sab glenoline, thiol derivative. Polymerization block anti-filled additive. Cov tshuaj sawv cev muaj xws li cyclohexylbenzene, biphenyl thiab lwm yam tshuaj.

Thaum cov biphenyl siv los ua cov khoom siv ua ntej, thaum qhov hluav taws xob nce mus txog 4.5 txog 4.7V, ntxiv biphenyl yog electrochemically polymerized, tsim ib txheej ntawm conductive zaj duab xis nyob rau saum npoo ntawm qhov zoo electrode, ua rau lub sab hauv tsis kam ntawm lub roj teeb, yog li txwv lub charger tam sim no tiv thaiv roj teeb.

2.2.2 Ion kua ion kua electrolyte yog tag nrho ntawm yin thiab cation.

Txij li cov interi ions lossis cationic ntim tsis muaj zog, qhov nruab nrab tsis muaj zog, cov khoom siv hluav taws xob tsis sib xws, thiab oan-censoon tuaj yeem txav mus los ntawm chav tsev kub, uas yog kua. Nws tuaj yeem muab faib ua imidazole, pyrazole, pyridine, quaternary ammonium ntsev, thiab lwm yam. Piv nrog rau cov organic hnyav hnyav ntawm lithium ion roj teeb, ionic kua muaj 5 qhov zoo: 1 siab thermal stability, 200 ° C tsis tuaj yeem decompose; 2 vapor siab yuav luag 0, tsis tas yuav txhawj txog lub roj teeb; 3 ionic kua tsis yooj yim rau combusture Tsis muaj corrosiveness; 4 muaj hluav taws xob conductivity; 5 tshuaj lom neeg lossis electrochemical stability yog qhov zoo.

AN lossis cov ntawv zoo li PP13TFSI thiab 1Mollipf6ec / Dec (1: 1) rau hauv ib qho electrolyte, uas tuaj yeem ua tiav cov teebmeem tsis muaj roj, thiab ntxiv 2 wt% liboB additive hauv cov kab ke no txhawm rau txhim kho kev sib raug zoo. Qhov teeb meem nkaus xwb uas yuav tsum tau daws yog qhov conductivity ntawm ion nyob rau hauv lub electrolyte system. 2.

2.3 Xaiv lub thermal stability ntawm lithium ntsev hexafluorophosphate (LiPF6) yog siv dav siv electrolyte lithium ntsev hauv cov khoom lag luam lithium-ion roj teeb. Txawm hais tias nws qhov xwm txheej tsis zoo, nws qhov kev ua tau zoo tag nrho yog qhov zoo tshaj plaws.

Txawm li cas los xij, LiPF6 kuj muaj nws qhov tsis zoo, piv txwv li, LiPF6 yog tshuaj thiab thermodynamically tsis ruaj khov, thiab cov tshuaj tiv thaiv tshwm sim: LIPF (6S) → LIF (S) + PF (5G), cov tshuaj tiv thaiv tsim PF5 yog ib qho yooj yim los tawm tsam cov organic hnyav hauv oxygen atom kho siab rau electrons, uas ua rau qhib lub voj voog polymerization thiab solvent ether, tshwj xeeb tshaj yog cov tshuaj tiv thaiv kub. Kev tshawb fawb tam sim no ntawm kub electrolyte ntsev yog concentrated nyob rau hauv cov organic lithium ntsev teb. Cov tshuaj sawv cev tseem ceeb nrog boron-based ntsev, imine-based lithium ntsev.

LIB (C2O4) 2 (liboB) yog ib qho tshiab hluavtaws electrolyte ntsev nyob rau hauv xyoo tas los no. Nws muaj ntau yam zoo heev, decomposing kub 302 ° C, muaj peev xwm tsim ib tug ruaj khov SEI zaj duab xis nyob rau hauv ib tug tsis zoo electrode. Txhim kho qhov kev ua tau zoo ntawm graphite hauv PC raws li cov tshuaj electrolytic, tab sis nws cov viscosity loj, impedance ntawm SEI zaj duab xis tsim [14].

Lub decomposition kub ntawm LIN (SO2CF3) 2 (Litfsi) yog 360 ° C, thiab cov ion conductivity ntawm ib txwm kub yog me ntsis qis dua LiPF6. Lub electrochemical stability yog zoo, thiab oxidation muaj peev xwm yog hais txog 5.0V, uas yog cov organic lithium ntsev tshaj plaws, tab sis nws hnyav corrosion ntawm Al puag txheej kua.

2.2.4 Polymer Electrolyte Ntau cov khoom lag luam lithium ion roj teeb siv hluav taws xob hluav taws xob thiab hluav taws xob tsis zoo, yog tias qhov xau yuav ua rau hluav taws kub.

Qhov no yog tshwj xeeb tshaj yog muaj zog lithium-ion roj teeb uas muaj peev xwm, siab zog ceev. Es tsis txhob siv cov khoom siv hluav taws xob tsis zoo ntawm cov khoom siv hluav taws xob tsis zoo siv cov hluav taws xob hluav taws xob hluav taws xob, nws tuaj yeem txhim kho kev nyab xeeb ntawm lithium-ion roj teeb. Kev tshawb fawb ntawm polymer electrolyte, tshwj xeeb tshaj yog gel-hom polymer electrolyte tau ua tiav zoo.

Tam sim no, nws tau ua tiav hauv kev lag luam roj teeb lithium-ion. Raws li kev faib tawm ntawm lub cev polymer, gel polymer electrolyte tseem ceeb nrog peb pawg hauv qab no: PAN-based polymer electrolyte, PMMA polymer electrolyte, PVDF-based polymer electrolyte. Txawm li cas los xij, cov gel-hom polymer electrolyte yog qhov tshwm sim los ntawm kev cuam tshuam ntawm cov khoom siv hluav taws xob qhuav thiab cov kua electrolyte cuam tshuam, thiab gel-hom polymer roj teeb tseem muaj ntau txoj haujlwm ua.

2.3 Cov khoom siv zoo tuaj yeem txiav txim siab tias cov khoom siv hluav taws xob zoo tsis ruaj khov thaum lub zog them lub xeev siab tshaj 4V, thiab nws yog ib qho yooj yim los tsim kom muaj cua sov yaj hauv qhov kub kub kom decompose oxygen, oxygen thiab organic solvents txuas ntxiv ua rau cov cua kub thiab lwm yam roj, txo kev ruaj ntseg ntawm lub roj teeb [2, 17-19]. Yog li ntawd, cov tshuaj tiv thaiv ntawm qhov zoo electrode thiab cov electrolyte yog suav tias yog ib qho tseem ceeb ua rau kub.

Hais txog cov khoom siv ib txwm muaj, txhim kho txoj hauv kev zoo ntawm nws txoj kev nyab xeeb yog txheej hloov kho. Rau cov txheej txheej ntawm cov khoom zoo electrode nrog MgO, A12O3, SiO2, TiO2, ZnO, SnO2, ZrO2, thiab lwm yam, tuaj yeem txo cov tshuaj tiv thaiv Die +-rov qab zoo thiab electrolyte thaum txo cov chromatography ntawm qhov zoo electrode, inhibiting theem hloov ntawm cov tshuaj electrode zoo.

Txhim kho nws cov qauv kev ruaj ntseg, txo qhov kev tsis sib haum xeeb ntawm cation hauv lattice, yog li txo qis cov tshuaj tiv thaiv theem nrab ntawm cov txheej txheem ncig. 2.4 Cov khoom siv carbon tam sim no siv thaj chaw tshwj xeeb qis, tus nqi siab dua thiab kev tawm platform, tus nqi me me thiab tso tawm platform, lub thermal stability, kuj zoo thermal lub xeev, ib tug kuj zoo thermal stability, kuj siab thermal stability, kuj muaj thermal stability.

Xws li nruab nrab theem carbon microspheres (MCMB), los yog Li9Ti5o12 ntawm spinel qauv, uas yog zoo dua li cov qauv stability ntawm laminated graphite [20]. Txoj kev tam sim no txhim kho kev ua haujlwm ntawm cov khoom siv roj carbon monoxide yog qhov tseem ceeb rau kev kho deg (nto oxidation, nto halogenation, carbon cladding, txheej hlau, hlau oxide, polymer txheej) los yog qhia cov hlau los yog non-metallic doping. 2.

5 Lub diaphragm tam sim no siv rau hauv kev lag luam roj teeb lithium-ion tseem yog cov khoom siv polyolefin, thiab nws qhov tsis zoo tseem ceeb yog kub thiab electrolytic fluid infiltration tsis zoo. Txhawm rau kov yeej cov teeb meem no, cov kws tshawb fawb tau sim ntau txoj hauv kev, xws li nrhiav cov khoom siv thermal stability, los yog ntxiv me me ntawm Al2O3 lossis SiO2 nanopowdia, uas tsis tsuas yog muaj cov diaphragm, tab sis kuj muaj thermal stability ntawm cov khoom zoo electrode. siv.

MIAO li al, polyimide nano nonwoven fabrication npaj los ntawm electrostatic spinning txoj kev. DR thiab TGA-zoo li tus cwj pwm txhais tau hais tias nws tsis tuaj yeem tswj tau qhov thermal stability ntawm 500 ° C, tab sis kuj muaj qhov zoo dua electrolyte infiltration txheeb ze rau CELGARD diaphragm. WANG et al npaj AL2O3-PVDF nanoscopic microporous membrane, uas muaj cov khoom zoo electrochemical thiab thermal stability, txaus siab rau kev siv lithium-ion roj teeb cais.

3 Cov ntsiab lus thiab tos ntsoov rau cov roj teeb lithium-ion rau lub tsheb hluav taws xob thiab lub zog cia, uas yog ntau dua li cov khoom siv hluav taws xob me me, thiab kev siv ib puag ncig yog qhov nyuaj dua. Hauv cov ntsiab lus, peb tuaj yeem pom tias nws txoj kev ruaj ntseg yog nyob deb ntawm kev daws teeb meem, thiab tau dhau los ua qhov kev tsis sib haum xeeb tam sim no. Kev ua haujlwm tom ntej yuav tsum yog qhov tob rau qhov thermal effect uas lub roj teeb yuav ua rau tom qab ua haujlwm tsis zoo, thiab nrhiav txoj hauv kev zoo los txhim kho kev nyab xeeb ntawm lithium ion roj teeb.

Tam sim no, kev siv cov tshuaj fluorine-muaj cov kuab tshuaj thiab cov nplaim hluav taws xob ntxiv yog ib qho tseem ceeb rau kev tsim cov roj teeb lithium-ion kev nyab xeeb. Yuav ua li cas sib npaug electrochemical kev ua tau zoo thiab kev nyab xeeb kub yuav yog kev tshawb fawb yav tom ntej. Piv txwv li, ib qho kev ua tau zoo ntawm cov nplaim hluav taws kub retardant kev sib xyaw ua ke P, N, F, thiab CL yog tsim, thiab cov kuab tshuaj organic uas muaj qhov kub hnyiab, lub teeb nyem siab yog tsim, thiab cov tshuaj electrolytic ntawm kev nyab xeeb kev ua tau zoo yog tsim.

Composite nplaim retardants, dual muaj nuj nqi additives kuj yuav ua rau yav tom ntej txoj kev loj hlob tiam sis. Hais txog cov khoom siv roj teeb lithium ion electrode, cov khoom siv tshuaj lom neeg ntawm cov khoom sib txawv, cov qib ntawm rhiab heev ntawm cov khoom siv hluav taws xob ntawm tus nqi thiab cov khoom siv hluav taws xob tsis sib haum, thiab nws tsis tuaj yeem siv ib lossis txwv ob peb electrode / electrolyte / additives rau tag nrho cov roj teeb qauv tsim. Yog li ntawd, yav tom ntej, peb yuav tsum tsom mus rau kev tsim cov roj teeb sib txawv rau cov khoom siv electrode.

Nyob rau tib lub sijhawm, nws tseem tab tom tsim cov roj teeb polymer lithium-ion nrog kev ruaj ntseg siab lossis kev txhim kho ntawm cov khoom siv hluav taws xob tsis muaj hluav taws xob uas muaj ib qho cation conductive thiab ceev ion thauj thiab siab thermostability. Tsis tas li ntawd, kev txhim kho ionic kua ua tau zoo, txhim kho cov khoom siv hluav taws xob yooj yim thiab pheej yig kuj yog ib feem tseem ceeb ntawm kev tshawb fawb yav tom ntej.