Lithium-ion roj teeb muaj pes tsawg leeg

Kev sib xyaw thiab rov ua dua ntawm lithium-ion roj teeb

Covlithium-ion roj teebyog tsim los ntawm electrolyte, cais, cathode thiab anode thiab rooj plaub.

Cov electrolyteNyob rau hauv lub lithium-ion roj teeb yuav ua tau ib tug gel los yog ib tug polymer, los yog ib tug sib tov ntawm gel thiab polymer.

Cov electrolyte nyob rau hauv Li-ion roj teeb ua ib qho nruab nrab rau kev thauj cov ions hauv lub roj teeb.Nws feem ntau muaj lithium ntsev thiab cov kuab tshuaj organic.Cov electrolyte ua lub luag haujlwm tseem ceeb hauv kev thauj khoom ion ntawm qhov zoo thiab qhov tsis zoo ntawm cov roj teeb lithium-ion, kom ntseeg tau tias lub roj teeb tuaj yeem ua tiav qhov hluav taws xob siab thiab lub zog loj.Cov electrolyte feem ntau yog tsim los ntawm high-purity organic solvents, lithium electrolyte ntsev thiab tsim nyog additives ua tib zoo ua ke nyob rau hauv tej proportions nyob rau hauv tej yam kev mob.

Cov khoom siv cathodeHom ntawm lithium-ion roj teeb:

• LiCOO 2
• Li2MnO3
• LiFePO4
• NCM
• NCAAB

 Cov ntaub ntawv cathode muaj ntau dua 30% tus nqi ntawm tag nrho cov roj teeb.

Lub anodentawm lithium-ion roj teeb muaj

Tom qab ntawd lub anode ntawm lithium-ion roj teeb muaj li ntawm 5-10 feem pua ​​​​cov nqi ntawm tag nrho cov roj teeb.Carbon-based anode cov ntaub ntawv yog cov khoom siv anode feem ntau siv rau cov roj teeb lithium-ion.Piv nrog rau cov tsoos hlau lithium anode, nws muaj kev ruaj ntseg thiab ruaj khov dua.Carbon-based anode cov ntaub ntawv feem ntau yog los ntawm ntuj thiab dag graphite, carbon fiber thiab lwm yam ntaub ntawv.Ntawm lawv, graphite yog cov khoom tseem ceeb, uas muaj qhov tshwj xeeb ntawm thaj chaw thiab cov khoom siv hluav taws xob, thiab cov khoom siv carbon kuj muaj cov tshuaj lom neeg zoo thiab rov ua dua tshiab.Txawm li cas los xij, lub peev xwm ntawm cov khoom siv hluav taws xob tsis zoo yog qhov tsawg, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm qee cov ntawv thov kom muaj peev xwm ntau dua.Yog li, tam sim no muaj qee qhov kev tshawb fawb txog cov khoom siv carbon tshiab thiab cov ntaub ntawv sib xyaw, vam tias yuav txhim kho lub peev xwm thiab lub neej voj voog ntawm cov khoom siv carbon-based tsis zoo electrode.

Nws tseem muaj cov khoom siv silicon-carbon negtive electrode.Cov khoom siv Silicon (Si) : Piv nrog cov pa roj carbon tsis zoo electrodes, silicon tsis zoo electrodes muaj peev xwm ntau dua thiab lub zog ceev.Txawm li cas los xij, vim yog qhov loj ntawm cov khoom siv silicon, nws yooj yim ua rau lub ntim nthuav dav ntawm cov electrode, yog li shortening lub neej ntawm lub roj teeb.

Lub separatorntawm lithium-ion roj teeb yog ib feem tseem ceeb ntawm kev ua kom lub roj teeb ua haujlwm thiab kev nyab xeeb.Lub luag haujlwm tseem ceeb ntawm cov khoom sib cais yog cais qhov zoo thiab qhov tsis zoo electrodes, thiab tib lub sijhawm, nws tuaj yeem tsim cov channel rau ion txav thiab tswj cov electrolyte tsim nyog.Kev ua tau zoo thiab cov tsis muaj feem cuam tshuam ntawm lithium-ion roj teeb cais tau qhia raws li hauv qab no:

1. Chemical stability: Lub diaphragm yuav tsum muaj cov tshuaj zoo heev stability, zoo corrosion kuj thiab aging kuj nyob rau hauv cov organic hnyav tej yam kev mob, thiab muaj peev xwm tuav ruaj khov nyob rau hauv hnyav tej yam kev mob xws li kub thiab high humidity.

2. Mechanical zog: Lub separator yuav tsum muaj cov neeg kho tshuab muaj zog thiab elasticity kom txaus tensile lub zog thiab hnav tsis kam tiv thaiv kev puas tsuaj thaum sib dhos lossis siv.

3. Ionic conductivity: Nyob rau hauv cov organic electrolyte system, ionic conductivity yog qis dua li ntawm cov aqueous electrolyte system, yog li ntawd lub separator yuav tsum muaj cov yam ntxwv ntawm tsawg kuj thiab siab ionic conductivity.Nyob rau tib lub sijhawm, txhawm rau txo qhov tsis kam, lub thickness ntawm cov khoom sib cais yuav tsum yog nyias li sai tau los ua kom cov cheeb tsam electrode loj li sai tau.

4. Thermal stability: Thaum muaj qhov txawv txav lossis tsis ua haujlwm xws li overcharge, overdischarge, thiab luv luv Circuit Court tshwm sim thaum lub roj teeb ua haujlwm, lub separator yuav tsum muaj thermal stability zoo.Ntawm qhov kub thiab txias, lub diaphragm yuav tsum soften los yog yaj, yog li thaiv lub sab hauv ntawm lub roj teeb thiab tiv thaiv cov teeb meem kev nyab xeeb ntawm roj teeb.

5. Kev ntub dej txaus thiab cov qauv pore tswj tau: Cov qauv pore thiab txheej txheej ntawm cov khoom sib cais yuav tsum muaj cov dej ntub dej txaus kom ntseeg tau tias cov khoom sib cais, yog li txhim kho lub zog thiab lub voj voog lub neej ntawm lub roj teeb.Feem ntau hais lus, polyethylene flake (PP) thiab polyethylene flake (PE) microporous diaphragms yog cov khoom siv diaphragm tam sim no, thiab tus nqi kuj pheej yig.Tab sis muaj lwm yam lithium-ion roj teeb cais cov ntaub ntawv, xws li polyester, uas muaj kev ua tau zoo, tab sis tus nqi kuj siab.