Electrical Resistivity of Natural Graphite/Polymer Composite based Bipolar Plates for Phosphoric Acid Fuel Cells by Addition of Carbon Black카본블랙 첨가량에 따른 인산형 연료전지(PAFC) 분리판용 천연흑연-고분자복합재료의 전기비저항
- Other Titles
- 카본블랙 첨가량에 따른 인산형 연료전지(PAFC) 분리판용 천연흑연-고분자복합재료의 전기비저항
- Authors
- Kim, Hyo-Chang; Lee, Sang-Min; Nam, Gibeop; Roh, Jae-Seung
- Issue Date
- Oct-2020
- Publisher
- MATERIALS RESEARCH SOC KOREA
- Keywords
- phosphoric acid fuel cell (PAFC); bipolar plates; carbon black; resistivity; composite
- Citation
- KOREAN JOURNAL OF MATERIALS RESEARCH, v.30, no.10, pp 522 - 532
- Pages
- 11
- Journal Title
- KOREAN JOURNAL OF MATERIALS RESEARCH
- Volume
- 30
- Number
- 10
- Start Page
- 522
- End Page
- 532
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/28327
- DOI
- 10.3740/MRSK.2020.30.10.522
- ISSN
- 1225-0562
2287-7258
- Abstract
- Conductive polymer composites with high electrical and mechanical properties are in demand for bipolar plates of phosphoric acid fuel cells (PAFC). In this study, composites based on natural graphite/fluorinated ethylene propylene (FEP) and different ratios of carbon black are mixed and hot formed into bars. The overall content of natural graphite is replaced by carbon black (0.2 wt% to 3.0 wt%). It is found that the addition of carbon black reduces electrical resistivity and density. The density of composite materials added with carbon black 3.0 wt% is 2.168 g/cm(3), which is 0.017 g/cm(3) less than that of non-additive composites. In-plane electrical resistivity is 7.68 mu Omega m and through-plane electrical resistivity is 27.66 mu Omega m. Compared with non-additive composites, in-plane electrical resistivity decreases by 95.7 % and through-plane decreases by 95.9 %. Also, the bending strength is about 30 % improved when carbon black is added at 2.0 wt% compared to non-additive cases. The decrease of electrical resistivity of composites is estimated to stem from the carbon black, which is a conductive material located between melted FEP and acts a path for electrons; the increasing mechanical properties are estimated to result from carbon black filling up pores in the composites.
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