Addition of NH₄HCO₃ as pore-former in membrane electrode assembly for PEMFC

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• 作者：Jishi Zhao ; Xiangming He ; Li Wang ; Jianhua Tian ; Chunrong Wan ; Changyin Jiang
• 关键词：PEMFC ; MEA ; Pt loading ; Pore-former ; NH₄HCO₃
• 刊名：International Journal of Hydrogen Energy
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：32
• 期：3
• 页码：380-384
• 全文大小：324 K

文摘

NH₄HCO₃, (NH₄)₂SO₄ and (NH₄)₂C₂O₄ were used as pore-formers to prepare MEAs of proton exchange membrane fuel cells (PEMFC). The addition of NH₄HCO₃ presented the best performance of the MEA. ESEM analysis showed that the addition of NH₄HCO₃ made the dispersion of the catalyst on the surface of the MEA more uniform, and made the surface more porous, leading to low resistance for gas diffusion. The addition of NH₄HCO₃ reduced the Pt loading in MEA from 0.4 to and kept the performance of MEA to be unchanged, leading to the cost reduction of the PEMFC. The ratio of the Pt loading and NH₄HCO₃ was optimized to be the proper value of 1:2, which presented the maximum power density of . Addition of NH₄HCO₃ is an effective way to improve the performance of MEAs, reducing the cost of PEMFC.