Lub tsheb roj teeb qauv

Cov txheej txheem kev ua haujlwm ntawm lub tsheb roj teeb kom hloov hluav taws xob lub zog hluav taws xob ntawm sab nraud sab nraud rau hauv roj teeb cia rau hauv hluav taws xob tshuaj thiab khaws cia. Them tus nqi: tus nqi tam sim no yuav tsum them lub roj teeb rau lub peev xwm nyob hauv lub sijhawm teev, lossis lub sijhawm uas yuav tsum them rau lub peev xwm nyob ntawm qee yam tam sim no. Zoo ib yam li tus nqi tawm, feem ntau yog hais los ntawm tus nqi (ntau C) lossis sijhawm nrawm. Qhov hluav taws xob tas li: ib txoj kev them nqi uas ua kom lub zog ntawm qhov kawg ntawm lub qhov hluav taws xob tas mus li thaum lub tsheb roj teeb tau them tas. Kev them tas li tam sim no: txoj kev them uas qhov kev hloov ntawm lub roj tseem tsis hloov thaum lub sijhawm them. Kev tswj hwm: Kev hloov pauv yog qhov hloov ntawm roj teeb hluav taws xob thiab hluav taws xob muaj peev xwm tshwm sim los ntawm lub roj teeb hloov los ntawm lub xeev zoo li qub (tam sim no i=0) mus rau lub xeev ua haujlwm (i> o).

Cov khoom ntawm qhov hluav taws xob thiab qhov tam sim no sib npaug los ntawm lub zog, thiab tom qab sib npaug los ntawm lub sijhawm ua haujlwm roj teeb yog lub zog tsim tawm, yog li cov xwm txheej polarization qhia txog lub zog poob los ntawm lub xeev zoo li qub mus rau lub xeev ua haujlwm, yog li ntawd qhov me me dua qhov poob, qhov zoo dua Cov. Hom kev tshwm sim polarization suav nrog anode polarization, cathode polarization, ohmic polarization (resistance polarization), concentration polarization thiab electrochemical polarization. Qhov pom ntawm polarization kuj tuaj yeem nkag siab tias yog qhov sib txawv los ntawm qhov muaj qhov sib txig sib luag. Cov txheej txheem thermodynamic equilibrium muaj feem cuam tshuam nrog qhov kev tshwm sim thim rov qab. Qhov ntsuas ntawm qhov hloov ntawm qhov thim rov qab lossis cov txheej txheem sib npaug yog qhov tsawg heev, tab sis cov txheej txheem tiag tiag yuav tsum muaj tus nqi qee yam, thiab qee zaum tus nqi siab yuav tsum tau ua.