Lub thickness ntawm cov roj diffusion txheej (GDL) nyob rau hauv ib tug PEM (proton exchange membrane) roj cell yog ib qho tseem ceeb parameter uas yuav cuam tshuam rau kev ua tau zoo, durability, thiab nqi ntawm cov roj cell. Lub thickness ntawm GDL yog txiav txim los ntawm ntau yam, xws li:
Kev khiav hauj lwm tej yam kev mob: Lub thickness ntawm GDL tuaj yeem cuam tshuam los ntawm kev ua haujlwm ntawm cov roj cell, xws li qhov ceev tam sim no, kub, thiab av noo. Piv txwv li, qhov ceev dua tam sim no yuav xav tau GDLs nyias kom txo tau cov kev txwv loj thauj mus los, thaum qhov kub siab dua yuav xav tau GDLs tuab dua los txhim kho kev ruaj ntseg thiab ua haujlwm ntev.
Electrode qauv: Lub thickness ntawm GDL kuj tuaj yeem cuam tshuam los ntawm cov qauv thiab cov khoom ntawm cov electrodes hauv cov roj cell. Piv txwv li, lub thickness ntawm GDL tuaj yeem ua kom zoo kom phim cov thickness ntawm cov txheej txheem catalyst los txhim kho kev sib cuag ntawm cov reactants thiab cov catalyst.
Cov khoom siv: Cov khoom siv ntawm GDL, xws li cov porosity, permeability, thiab hluav taws xob conductivity, kuj tuaj yeem cuam tshuam cov thickness ntawm GDL. Ib qho porosity ntau dua tuaj yeem tso cai rau lub thinner GDL kom ua tiav tib theem ntawm kev thauj mus los, thaum lub zog hluav taws xob ntau dua tuaj yeem tso cai rau lub thinner GDL kom ua tiav tib theem ntawm kev sib cuag hluav taws xob.
Tus nqi: Lub thickness ntawm GDL kuj tuaj yeem cuam tshuam los ntawm tus nqi ntawm cov ntaub ntawv thiab cov txheej txheem tsim khoom siv los tsim GDL. Thicker GDLs yuav kim dua los tsim thiab tuaj yeem ua rau tus nqi tag nrho ntawm cov roj cell.
Hauv cov ntsiab lus, qhov tuab ntawm GDL hauv PEM roj cell yog txiav txim siab los ntawm ntau yam, suav nrog cov kev ua haujlwm, cov qauv electrode, cov khoom siv, thiab cov nqi. Optimizing lub thickness ntawm GDL yog ib qho tseem ceeb kom ua tiav kev ua tau zoo, durability, thiab nqi-zoo ntawm cov roj cell.
