论文成果
Effect of nonuniformity of the contact pressure distribution on the electrical contact resistance in proton exchange membrane fuel cells
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- 论文类型：期刊论文
- 发表时间：2011-05-01
- 发表刊物：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
- 收录刊物：SCIE、EI
- 文献类型：J
- 卷号：36
- 期号：10
- 页面范围：6039-6044
- ISSN号：0360-3199
- 关键字：Fuel cells; Electrical contact resistance; Contact pressure
- 摘要：Electrical contact resistance (ECR) is one of the most important factors affecting the ohmic loss in proton exchange membrane (PEM) fuel cells. Dominated by the contact pressure at the interface of two neighboring components, the ECR can be reduced by increasing the clamping force applied on fuel cell stack. However, too large a clamping force will result in excessive resistance to the transport of reactants in the gas diffusion layer (GDL) and even damage to the fuel cell components. Therefore, for a given clamping force, the minimum ECR is expected by making the pressure distribution as uniform as possible. This paper investigates two questions: (a) how to evaluate the distribution of non-uniform pressure based on the ECR, and (b) in what situation will a uniform pressure distribution reduce the ECR obviously, i.e., the sensitivity of the contact resistance to the pressure distribution.
Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
