http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고분자전해질 연료전지 분리판용 복합재의 전기적/기계적 특성
이희섭(Hee-Sub Lee),김성근(Sung-Geun Kim),안성훈(Sung-Hoon Ahn),전의식(Ui-Sik Jeon),안상열(Sang-Yeoul Ahn),안병기(Byung-Ki Ahn) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Fuel cell is one of promising environment-friendly energy sources for the next generation. The bipolar plate is a major component of the PEM fuel cell stack, which takes a large portion of the stack cost. In this study, as the alternative materials of bipolar plate of PEM fuel cells, graphite composites were fabricated by compression molding. P-15 particles were mixed with epoxy resin to provide electric conductivity and structural properties. To find out the most suitable electric properties, graphite composites were fabricated with different mixing ratio, processing pressure and temperature. By increasing mixing ratio and fabricated pressure, electric conductivity was improved due to the smaller gap between the particles. In addition, by increasing process temperature, the electric conductivity was also improved probably by the excited molecular activities and resulting low viscosity of the epoxy resin for better fill of the gaps. The results of mechanical test showed that the tensile strength of graphite composite was about 5㎫.
이희섭(Lee, Hee-Sub),김성근(Kim, Sung-Geun),안성훈(Ahn, Sung-Hoon),전의식(Jeon, Ui-Sik),안상열(Ahn, Sang-Yeoul),안병기(Ahn, Byung-Ki) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.11
The bipolar plate is a major component of the PEM fuel cell stack, which takes a large portion of stack cost. In this study, as alternative materials for bipolar plate of PEM fuel cells, graphite composites were fabricated by compression molding. Graphite particles mixed with epoxy resin were used as the main substance to provide electric conductivity. To achieve desired electric properties, specimens made with different mixing ratio, processing pressure and temperature were tested. To increase mechanical strength, one or two layer of woven carbon fabric were added to the original graphite and resin composite. Thus, the composite material is consisted of the three phases: graphite particles, epoxy resin, and carbon fabric. By increasing mixing ratio, fabricated pressure and process temperature, electric conductivity was improved. The results of tensile test showed that the tensile strength of two-phase graphite composite was about 5MPa, and that of three-phase composite was increased to 54MPa.