L_CL 10[um] "催化层厚度" L_GDL 200[um] "气体扩散层厚度" L_mem 30[um] "膜厚度" L_MPL 20[um] "微孔层厚度" a_CL 5e7[m^2/m^3] "比表面积,催化层" epsl_CL 0.2 "离聚物体积分数,催化层" epss_CL 0.4 "电极体积分数,催化层" epss_GDL 0.4 "固相体积分数,气体扩散层" epss_MPL 0.4 "固相体积分数,微孔层" epsg_CL 1-epss_CL-epsl_CL "Gas phase volume fraction, catalytic layers" epsg_MPL 1-epss_MPL "Gas phase volume fraction, microporous layers" epsg_GDL 1-epss_GDL "Gas phase volume fraction, gas diffusion layers" sigmas_CL 25[S/m] "电导率,催化层" sigmas_GDL 100[S/m] "电导率,气体扩散层" sigmas_MPL 50[S/m] "电导率,微孔层" kappag_CL 1e-12[m^2] "Gas permeability, catalytic layer" kappag_GDL 1e-10[m^2] "Gas permeability, gas diffusion layer" kappag_MPL 1e-10[m^2] "Gas permeability, micro porous layer" E_cell 1[V] "电池电位" i0_H2 1e2[A/m^2] "交换电流密度,氢氧化" i0_O2 1e-4[A/m^2] "交换电流密度,氧还原" alphaa_O2 3 "Anodic transfer coefficient, oxygen reduction" T0 70[degC] "External/initial temperature" RH_an 85[%] "相对湿度,阳极入口" RH_cath 85[%] "相对湿度,阴极入口" kappa_CL 0.3 "Thermal conductivity, catalytic layer" kappa_MPL 0.3 "Thermal conductivity, microporous layer" kappa_GDL 0.3 "Thermal conductivity, gas diffusion layer"