Browse > Article
http://dx.doi.org/10.7467/KSAE.2014.22.4.065

A Study to Improve PEMFC Performance by Using Electro Polishing and CrN Coating on Metal Bipolar Plate  

Hwang, Sung Tack (Department of Mechanical Engineering, Chonnam National University)
Cheon, Seung Ho (Department of Mechanical Engineering, Chonnam National University)
Song, Jun Seok (Department of Mechanical Engineering, Chonnam National University)
Yun, Young-Hoon (Department of Hydrogen & Fuel Cell Technology, Dongshin University)
Kim, Byeong Heon (Department of Mechanical Engineering, Chonnam National University)
Zhang, Xia (Department of Mechanical Engineering, Chonnam National University)
Kim, Dae-Ung (Research and Development Center, Global Battery Co., Ltd.)
Hyun, Deoksu (Research and Development Center, Global Battery Co., Ltd.)
Oh, Byeong Soo (Department of Mechanical Engineering, Chonnam National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.4, 2014 , pp. 65-71 More about this Journal
Abstract
As an important component of a fuel cell, the bipolar plate comprises a large proportion in the fuel cell's volume, weight and price. The bipolar plate is the most widely used; however, graphite bipolar plate is large in volume, brittle and therefore easily broken during assembling. In addition, due to its poor machinability, production costs a lot, unless mass production. Compared with the graphite bipolar plate, the metal bipolar plate has good machinability, high electric conductivity and strong mechanical strength; however, it corrodes easily and has a high contact resistance, so in order to prevent corrosion and reduce the contact resistance, the basic metal needs to be processed by use of electro polishing and coating. The water which is produced by electrochemical reactions in the fuel cell must be discharged smoothly. In this study, in order to prevent corrosion the processes of electro polishing and CrN coating were used. According to the presence or absence of these processes, the contact angles can be measured and different metal bipolar plates can be made, these plates can be used for comparing and analyzing the performance of the fuel cell.
Keywords
Metal bipolar plate; Fuel cell; Electro polishing; Coating; CrN;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 S. H. Kim, Characteristic of Regenerative Braking by Using Additional Generator in Fuel Cell Hybrid System, M. S. Thesis, Channam National University, Gwangju, Korea, 2011.
2 J. H. Jung, Surface Treatment on Metallic Bipolar Plate for Polymer Electrolyte Membrane Fuel Cell, M. S. Thesis, Channam National University, Gwangju, Korea, 2009.
3 M. T. Hwang, Performance Characteristic of PEMFC with Metal Bipolar Plate at Various Environmental Temperature and Cooling, M. S. Thesis, Channam National University, Gwangju, Korea, 2010.
4 C. J. Netwall, B. D. Gould, J. A. Rodgers, N. J. Nasello and K. E. Swider-Lyons, "Decreasing Contact Resistance in Proton-exchange Membrane Fuel Cells with Metal Bipolar plates," Journal of Power Sources, Vol.227, No.1, pp.137-144, 2013.   DOI   ScienceOn
5 D. W. Kim, K. P. Hong, M. W. Cho and E. S. Lee, "Mirrorlike Machining of SUS304 by Combined Process of EP and MR Polishing," Journal of the Korean Society of Machine Tool Engineers, Vol.19, No.2, pp.267-274, 2010.   과학기술학회마을
6 D. K. Oweans and R. C. Wendit, "Estimation of the Surface Free Energy of Polymer,"Journal of Applied Polymer Science, Vol.13, No.8, pp.1741-1747, 1969.   DOI
7 R. J. Good, Contact Angle, Wettability and Adhesion, Edited by K. L. Mittal, Urecht, pp.3-36, VSP, Leiden, Netherlands, 1993.
8 R. J. Good and C. J. van Oss, Modern Theory of Contact Angles and the Hydrogen Bond Components of Surface Energies, Edited by M. E. Schrader and G. I. Loeb, Springer, New York, pp.1-27, 1992.
9 Y. K. Cho, S. K. Kim, W. B. Lee and S. W. Kim, "Low Temperature Deposition of CrN Films by the AIP Method," Journal of the Korean Society for Heat Treatment, Vol.20, No.2, pp.78-83, 2007.   과학기술학회마을