SU-8을 이용한 고분자전해질 연료전지 분리판의 제작

Fuel cell is a electrochemical device that combines hydrogen fuel and oxygen from the air to produce electricity, heat and water. Recently, the interest on development of fuel cell is growing rapidly because it is considered to be a novel form of power source to solve not only the environment problem but also natural resource exhaustion problem. In this paper, hydrogen gas flow in micro-channel was numerically analyzed about various channel shapes to improve the efficiency of micro fuel cell. Flow characteristics with the same boundary condition were simulated in six different shapes of micro-channels which have been already developed and newly designed as well. The result of analysis shows that flow characteristics such as velocity, uniformity, and flow rate, depend highly upon the channel shape itself. That means it is expectable to increase the efficiency of micro fuel cell through optimal configuration of channel shape for hydrogen gas flow. Finally, actual micro flow channels were fabricated using SU-8 and the performance of PEM fuel cell was also carried out with these micro prototypes.