Tsheb roj teeb lub tsheb

Ib qho ntawm cov tseev kom muaj rau roj teeb tsheb yog tias yuav tsum muaj qhov tawm tam sim no loj. Ntawd yog, qhov tshuaj tiv thaiv tus nqi yuav tsum yog qhov loj heev, uas ua rau lub xwm txheej dhau los ntawm qhov sib npaug ntawm tus nqi sib npaug, uas yog, muaj qhov tshwm sim polarization. Lub zog ntawm cov roj teeb suav nrog kev tiv thaiv ntawm cov hluav taws xob, qhov tsis kam ntawm cov khoom siv electrode, thiab txawm tias qhov ua rau los ntawm kev nplaum ntawm cov khoom tiv thaiv (xws li nag lossis daus ntawm hydroxide rau ntawm electrode). Ohmic polarization yog hais txog kev sib ncau ua rau kev ua haujlwm. Kev sib tsoo polarization yog qhov sib txawv ntawm cov hluav taws xob electrode los ntawm qhov sib npaug ntawm tus nqi los ntawm cov kev hloov pauv hauv cov concentration ntawm reactant thaum cov tshuaj tiv thaiv electrochemical tseem nyob hauv kev kawm.

Qhov anode thiab cathode polarization hais txog qhov tshwm sim uas anode thiab cathode muaj peev xwm hloov siab los ntawm cov nqi zoo li qub tom qab lub roj teeb nkag hauv lub xeev ua haujlwm. Ib cov txheej txheem electrode suav nrog cov txheej txheem ntawm ib los yog ntau cov tshuaj tiv thaiv txais lossis poob hluav taws xob. Kev ncau ntau yam tshwm sim los ntawm cov txheej txheem no yog hu ua electrochemical polarization. Kev them nqi (C-tus nqi): C yog thawj tsab ntawv ntawm Lub Peev Xwm, siv los qhia qhov sib txawv ntawm qhov tam sim no thaum lub roj teeb raug them thiab tawm. Piv txwv li, thaum lub sijhawm ntsuas qhov muaj peev xwm ntawm lub tsheb' s lub roj teeb uas ua tau rov qab yog 1100mAh, nws txhais tau tias lub sijhawm tawm ntawm 1100mAh (1C) tuaj yeem ntev txog 1 teev. Yog tias lub sijhawm tso tawm ntawm 200mA (0.2C) tuaj yeem ntev txog 5 teev, kev them nyiaj kuj tseem tuaj yeem muab xam raws li qhov kev sib piv no.