Measuring the through-plane and in-plane oxygen apparent diffusion coefficients in the gas diffusion layer

Yao, Keguang1,2; Long, Tiehan3; Wang, Yajun4; Yuan, Xiao-Zi5; Yao, Yao2; Wang, Haijiang2,6

2023-06-07

10.3389/fenrg.2023.1200603

FRONTIERS IN ENERGY RESEARCH   影响因子和分区

2296-598X

Accurately predicting oxygen mass transport resistance and current distribution in fuel cells requires significant knowledge of oxygen diffusion coefficients in both in-plane and through-plane directions. However, there are few methods for measuring in-plane oxygen diffusion coefficients, which are important parameters for simulating oxygen flux distribution in gas diffusion layers (GDLs). In this study, we establish measurement methods and calculations for both in-plane and through-plane oxygen diffusion coefficients. Using in-house designed cells, we measure the in-plane and through-plane oxygen apparent diffusion coefficients of a commercial carbon paper (AvCarb EP40) at various torques and gas flow rates. We also simulate oxygen flux distributions in the GDL under each torque and gas flow rate. Our results show that the channel part is the major contributor to total oxygen flux at high torque conditions and that an increase in torque leads to a decrease in the contribution from the land part. Simulation results also suggest that a higher gas flow rate and lower torque contribute to a more uniform distribution of oxygen flux in the GDL.

proton exchange membrane fuel cells gas diffusion layer oxygen diffusion coefficients land channel

SCI ; EI

英语

通讯

Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies[Y01406010] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N500] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Energy & Fuels

Energy & Fuels

WOS:001013632200001

FRONTIERS MEDIA SA

20232514279985

Diffusion in gases ; Flow of gases ; Flow rate ; Gases ; Oxygen ; Proton exchange membrane fuel cells (PEMFC)

Fluid Flow:631 ; Gas Dynamics:631.1.2 ; Fuel Cells:702.2 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Mechanical Variables Measurements:943.2

Web of Science

1.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin, Heilongjiang, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Guangdong, Peoples R China
3.China Acad Aerosp Aerodynam, Beijing, Peoples R China
4.Univ South China, Sch Elect Engn, Hengyang, Peoples R China
5.Energy Min & Environm Res Ctr, Natl Res Council Canada, Vancouver, BC, Canada
6.Southern Univ Sci & Technol, Key Lab Energy Convers & Storage Technol, Shenzhen, Peoples R China

Yao, Keguang,Long, Tiehan,Wang, Yajun,et al. Measuring the through-plane and in-plane oxygen apparent diffusion coefficients in the gas diffusion layer[J]. FRONTIERS IN ENERGY RESEARCH,2023,11.

Yao, Keguang,Long, Tiehan,Wang, Yajun,Yuan, Xiao-Zi,Yao, Yao,&Wang, Haijiang.(2023).Measuring the through-plane and in-plane oxygen apparent diffusion coefficients in the gas diffusion layer.FRONTIERS IN ENERGY RESEARCH,11.

Yao, Keguang,et al."Measuring the through-plane and in-plane oxygen apparent diffusion coefficients in the gas diffusion layer".FRONTIERS IN ENERGY RESEARCH 11(2023).