Effect of compression thickness on performance of gas diffusion layer of direct methanol fuel cells

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• 作者：Yong-Sheen Hwang ; Hoon Choi ; Gu Young Cho&#8230
• 关键词：Compression ratio ; Ohmic loss ; Mass transport loss ; Current collector ; PTFE gasket
• 刊名：International Journal of Precision Engineering and Manufacturing-Green Technology
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：1
• 期：3
• 页码：215-221
• 全文大小：589KB
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• 作者单位：Yong-Sheen Hwang (1)
  Hoon Choi (2)
  Gu Young Cho (3)
  Yoon Ho Lee (3)
  Suk-won Cha (3)
  
  1. Korea Construction Equipment Technology Institute, 36, Sandan-ro, Gunsan-si, Jeollabuk-do, 573-540, Republic of Korea
  2. Hyundai Heavy Industry Co. LTD., 17-10 Mabuk-ro 240beon-gil, Giheunng-gu, Yongin-si, Gyeonggi-do, 446-912, Republic of Korea
  3. Department of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Sillim9-dong, Kwanak-gu, Seoul, 151-744, Republic of Korea
  
• 刊物类别：Industrial and Production Engineering; Energy Efficiency (incl. Buildings); Sustainable Development;
• 刊物主题：Industrial and Production Engineering; Energy Efficiency (incl. Buildings); Sustainable Development;
• 出版者：Korean Society for Precision Engineering
• ISSN：2198-0810

文摘

This study considers the performance of a direct methanol fuel cell (DMFC) unit for the various compression ratios of a gas diffusion layer (GDL) on the cathode side. A performance of fuel cells is significantly influenced by the compression ratio of the GDL. The compression ratio of the GDL can be directly controlled by the concentration compression force at the central area of the cell and gasket thickness. The balancing of the compression ratio is an important factor to increase the unit cell performance of DMFCs. In this study, the performance test of the unit cell for varying compression ratio of a GDL on the cathode side is carried out. We describe how the compression ratio affects the stack performance by the variation of compression force for two different kinds of current collectors, which directly compresses the central area of the unit cell with varying gasket thickness. This study also suggests a method to show the effect of mass transport loss by amplitude of voltage fluctuation and the unit cell relationship between the pressure drop information and the peak power of the unit cell. Keywords Compression ratio Ohmic loss Mass transport loss Current collector PTFE gasket