A study on development of surface modification for iron metal bipolar plates

• Main Authors: Tseng, Wen-Chih, 曾文治
• Other Authors: Ger, Ming-Der
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/77727095266685844911

碩士 === 國防大學中正理工學院 === 應用化學碩士班 === 99 === The primary reason that causes the fuel cells to be unable to reach commercial application is its excessively high cost. The bipolar plates, one of the key components hold fifty to sixty percent of the cost of the fuel cells. Moreover, the bipolar plates also determine the power density of weight and volume of fuel cells. These hold more than eighty percent of the weight of the cell stack, excluding the end plates. Therefor, it is necessary to research how to reduce the cost and weight of bipolar plates and raise the utilization rate of its volume. This research uses high frequency induction heater, which heats metallic materials only, to proceed with the non-isothermal electroless deposition on iron metal bipolar plates. This method can raise the deposition rate of isothermal electroless plating and also improve the film corrosion resistance. Besides, it can reform the problems such as incapability of plating on large-scale or complex geometric substrates, one-sided plating only, slow in temperature heating and cooling, and difficult to assemble, making commercial mass-produce possible. The film composes of Ni-Mo-P ternary alloy -- Ni, with superior corrosion resistance, Mo, which is excellent both at thermal stability and corrosion resistance, and P, being used to control the film to form the amorphous structure. Furthermore, an alloy film with Mo can be increased at the thickness of gold replacement, which can boost greatly at the corrosion resistance and lifespan of the bipolar plates.