Qhov sib ntxiv ntawm cov khoom siv hluav taws xob tseem yog qhov tseem ceeb hauv cov txheej txheem kev npaj ntawm lithium hlau phosphate roj teeb slurry. Ntxiv cov khoom siv hluav taws xob tuaj yeem tsim cov khoom siv hluav taws xob hauv LiFePO, sau cov micro tam sim no, txo cov hluav taws xob tiv thaiv kev tiv thaiv, ua kom cov hluav taws xob tsiv teb tsaws, thiab yog li txhim kho kev them nqi thiab kev tawm ntawm LiFePO.
Cov khoom siv lithium hlau phosphate tau dhau los ua cov khoom siv hluav taws xob zoo heev rau cov roj teeb lithium-ion vim nws cov nqi qis, kev sib raug zoo ib puag ncig, muaj peev xwm tshwj xeeb, thiab kev ruaj ntseg zoo. Vim tias cov khoom siv lithium hlau phosphate tsis tshua muaj hluav taws xob, qee qhov ntawm cov khoom siv hluav taws xob yuav tsum tau ntxiv thaum npaj cov khoom xyaw. Tus neeg sawv cev conductive muaj qhov tshwj xeeb ntawm thaj chaw loj thiab ntau cov khoom hauv ib chav tsev loj, uas yog qhov tsim nyog rau kev tsim cov saw hlau zoo li cov khoom siv hluav taws xob hauv electrode, yog li txhim kho cov conductivity ntawm electrode, pab kom muaj peev xwm ntawm lithium hlau phosphate roj teeb thiab txo. lub polarization tsis kam ntawm lub roj teeb.
Cov khoom siv hluav taws xob muaj xws li carbon dub, graphite, carbon fiber, hlau fiber ntau, thiab lwm yam. Cov txheej txheem siab carbon dub muaj cov khoom zoo, nruj packed network chains, thiab ib cheeb tsam loj tshwj xeeb, uas yog qhov tsim nyog rau kev tsim cov saw zoo li cov qauv siv hauv lub electrode. Ntawm ntau hom carbon dub, acetylene dub (AB) yog qhov zoo tshaj plaws. Nws yog feem ntau ntseeg hais tias acetylene dub muaj ib tug tsawg degree ntawm lattice tsim, thiab lub Gibbs dawb zog ntawm lithium ion insertion thiab extraction nyob rau hauv nws yog tsis sib txawv heev; Tsis tas li ntawd, vim yog cov khoom siv hluav taws xob siab ntawm acetylene dub thiab nws qhov tsis kam tiv thaiv thiab tso cua sov, nws qhov cuam tshuam rau kev nyab xeeb ntawm lithium hlau phosphate roj teeb kuj me me.
Graphite thiab carbon fiber muaj qhov zoo conductivity, tsis tshua muaj ntom, ruaj khov qauv, thiab tshuaj lom neeg ruaj khov, thiab tseem yog siv los ua cov khoom siv hluav taws xob rau lithium-ion roj teeb cathode cov ntaub ntawv. Cov pa roj carbon nanotubes, ua ib hom khoom siv nanofiber, muaj qhov sib piv siab, thaj chaw loj tshwj xeeb, thiab cov khoom siv hluav taws xob zoo thiab thermal conductivity, ua rau lawv txoj kev xav zoo tshaj plaws rau cov roj teeb lithium-ion.
Cov ntsiab lus ntawm cov khoom siv hluav taws xob kuj muaj qhov cuam tshuam loj rau kev txhim kho kev them nyiaj thiab kev tso tawm ntawm LiFePO4 lithium hlau phosphate roj teeb. Yog hais tias cov ntsiab lus ntawm tus neeg sawv cev conductive tsawg dhau, nws yog ib qho nyuaj rau tsim ib tug zoo conductive network, uas tsis tuaj yeem tsim cov hluav taws xob hluav taws xob txaus thiab tsis tsim nyog rau kev them nyiaj tam sim no thiab tawm; Yog tias cov ntsiab lus siab dhau lawm, nws txo cov ntsiab lus txheeb ze ntawm cov tshuaj nquag, ua rau txo qis hauv cov ntim tshwj xeeb ntawm lub roj teeb.
