Rau cov roj teeb lithium-ion, feem ntau siv cov khoom siv hluav taws xob zoo tam sim no yog txhuas ntawv ci, thiab cov khoom tsis zoo electrode tam sim no yog tooj liab ntawv nyiaj. Txhawm rau kom ntseeg tau tias qhov ruaj khov ntawm cov khoom siv tam sim no hauv lub roj teeb, qhov purity ntawm ob qho tib si yuav tsum tau siab dua 98%. Nrog rau kev txhim kho txuas ntxiv ntawm lithium roj teeb thev naus laus zis, txawm tias nws yog lithium roj teeb siv rau cov khoom siv digital lossis roj teeb rau lub tsheb fais fab, peb txhua tus cia siab tias lub zog ceev ntawm lub roj teeb yuav siab npaum li qhov ua tau thiab qhov hnyav ntawm lub roj teeb yuav sib dua thiab sib dua. Qhov tseem ceeb tshaj plaws hauv cov khoom siv tam sim no yog Txo cov thickness thiab qhov hnyav ntawm cov khoom tam sim no intuitively txo qhov ntim thiab qhov hnyav ntawm lub roj teeb.
Vim li cas qhov zoo electrodes ntawm lithium-ion roj teeb siv txhuas ntawv ci thiab cov electrodes tsis zoo siv tooj liab ntawv ci? Muaj peb yam:
Ua ntej, tooj liab thiab txhuas ntawv ci muaj qhov zoo conductivity, mos zoo nkauj thiab tus nqi qis. Peb txhua tus paub tias lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lithium roj teeb yog cov khoom siv hluav taws xob hluav taws xob uas hloov cov hluav taws xob hluav taws xob rau hauv hluav taws xob hluav taws xob. Hauv cov txheej txheem no, peb xav tau ib qho nruab nrab los xa cov hluav taws xob hloov hluav taws xob los ntawm cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob xav tau ntawm no. Ntawm cov khoom siv zoo tib yam, cov khoom siv hlau yog cov khoom siv hluav taws xob tshaj plaws. Ntawm cov ntaub ntawv hlau, tooj liab ntawv ci thiab txhuas ntawv ci yog pheej yig thiab muaj cov conductivity zoo. Nyob rau tib lub sijhawm, hauv cov roj teeb lithium, peb feem ntau muaj ob txoj kev ua haujlwm: winding thiab lamination. Piv nrog rau winding, cov ncej ncej siv los npaj cov roj teeb yuav tsum muaj qee qhov kev hloov pauv kom ntseeg tau tias cov ncej ncej tsis raug kev txom nyem los ntawm kev tawg thiab lwm yam teeb meem thaum lub sij hawm winding. Ntawm cov ntaub ntawv hlau, tooj liab thiab txhuas ntawv ci kuj yog cov hlau mos. Cov kauj ruam kawg yog xav txog tus nqi ntawm kev npaj roj teeb. Hais txog kev hais lus, tooj liab thiab txhuas ntawv nyiaj kuj pheej yig, thiab lub ntiaj teb no nplua nuj nyob rau hauv tooj liab thiab txhuas cov khoom siv.
Qhov thib ob, tooj liab thiab txhuas ntawv ci yog qhov ruaj khov hauv huab cua. Aluminium yooj yim reacts chemically nrog oxygen nyob rau hauv cov huab cua, tsim ib tug ntom oxide zaj duab xis nyob rau saum npoo ntawm txhuas los tiv thaiv ntxiv cov tshuaj tiv thaiv ntawm txhuas. Qhov no nyias oxide zaj duab xis kuj muaj qee yam kev tiv thaiv ntawm txhuas hauv electrolyte. tooj liab nws tus kheej kuj ruaj khov nyob rau hauv cov huab cua thiab yeej tsis hnov mob nyob rau hauv qhuav huab cua.
Thib peb, lub peev xwm ntawm qhov zoo thiab qhov tsis zoo electrodes ntawm lithium roj teeb txiav txim siab siv cov ntawv txhuas txhuas rau qhov zoo electrode thiab tooj liab foil rau qhov tsis zoo electrode, tsis yog lwm txoj hauv kev. Qhov zoo electrode muaj peev xwm siab, thiab tooj liab ntawv yog yooj yim oxidation ntawm aluminium yog siab, uas tseem muaj cov nyhuv zoo ntawm cov txhuas sab hauv. Ob leeg yog siv los ua cov khoom siv tam sim no vim tias lawv muaj cov khoom siv zoo, yog cov mos mos (uas kuj yuav muaj txiaj ntsig zoo rau kev sib txuas), yog cov khoom siv thiab pheej yig, thiab tuaj yeem tsim cov yeeb yaj kiab oxide tiv thaiv ntawm lawv qhov chaw.
