Complex mechanisms of PEMFC performance variations influenced by both structural deformation and contact resistance under the clamping force

被引：9
作者：
Jing, Guoxi [1 ,2 ]
Hu, Chengbo [1 ,2 ]
Qin, Yanzhou [1 ,3 ]
Sun, Xiuxiu [1 ,2 ]
Ma, Teng [1 ,2 ]
机构：
[1] Hebei Univ Technol, Sch Mech Engn, Tianjin Key Lab Power Transmiss & Safety Technol N, Tianjin 300401, Peoples R China
[2] Hebei Univ Technol, Sch Mech Engn, Key Lab Hebei Prov Scale span Intelligent Equipmen, Tianjin 300401, Peoples R China
[3] Tianjin Univ, State Key Lab Engines, Tianjin 300350, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 58卷
基金：
中国国家自然科学基金;
关键词：
Proton exchange membrane fuel cell; Clamping force; Electrical contact resistance; Structural deformation; Electrical conductivity; GAS-DIFFUSION LAYER; POLYMER ELECTROLYTE MEMBRANE; TRANSPORT CHARACTERISTICS; ASSEMBLY PRESSURE; BIPOLAR PLATE; FLOW CHANNEL; OPTIMIZATION;
D O I：
10.1016/j.ijhydene.2024.01.164
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The performance of proton exchange membrane fuel cells (PEMFCs) is influenced by the clamping force applied during assembly. However, the mechanisms are complex and many remain unveiled. This study addresses the effects of structural deformation and electrical contact resistance (ECR) caused by clamping force on the PEMFC performance. The individual and coupled effects of the structural deformation of the gas diffusion layer (GDL) and the ECR between the GDL and bipolar plate (BP) are discussed in detail, and positive and negative factors influencing the PEMFC performance and their competition relations are revealed. The optimal clamping force is determined by both the structural deformation and ECR. The optimal clamping force for PEMFC varies across different operating voltage ranges. The optimal clamping force is between 0.5 MPa and 1 MPa for low voltage range, and it is 2 MPa for medium voltage range, and the clamping force has minimal impact on PEMFC performance for high voltage range. The influence of clamping force remains consistent across various PEMFC operating temperatures and relative humidity levels.
引用
收藏
页码：137 / 148
页数：12
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