尹 燕,裴亚彪,祝伟康,张俊锋
AuthorsHTML:尹 燕，裴亚彪，祝伟康，张俊锋
AuthorsListE:Yin Yan,Pei Yabiao,Zhu Weikang,Zhang Junfeng
AuthorsHTMLE:Yin Yan，Pei Yabiao，Zhu Weikang，Zhang Junfeng
Unit:天津大学内燃机燃烧学国家重点实验室，天津 300350
Unit_EngLish:State Key Laboratory of Engines，Tianjin University，Tianjin 300350，China
Abstract_Chinese:近年来，阴离子交换膜性能的提升使碱性膜燃料电池(AMFC)的研究成为热点．与质子交换膜燃料电池 (PEMFC)相比，其主要特点之一就是可以使用非贵金属催化剂替代商业 Pt/C，从而避免非贵金属在酸性中的不稳定 性．膜电极是燃料电池的核心部件，制约燃料电池的性能．催化层作为膜电极的主要部件，由催化剂和离聚物组 成．离聚物质量分数影响催化层孔的尺寸和分布，从而影响电化学反应速率和燃料电池反应中的氧扩散和水传 输．同时，催化层与气体扩散层接触的紧密程度也影响了接触电阻．因此，对催化层微观结构的调控决定着燃料电 池发电性能．目前，关于 AMFC 的催化层研究以贵金属 Pt/C 催化剂为主，对于非贵金属催化层研究相对较少，制 约了其在碱性膜燃料电池中的应用．本文使用实验室自制的 Co-N-C 催化剂和商业 FAA-3 离聚物制备了阴极催化 层，探究了 Co-N-C 催化层中离聚物的质量分数对催化层结构的影响，通过研究催化剂墨水的组分和配比，发现当 离聚物质量分数为 40%时燃料电池性能最高达到 139.7 mW/cm2 ，与使用 Pt/C 催化剂的燃料电池性能相近．
Abstract_English:Recently, with the improvement in the performance of anion exchange membranes，the research on alkaline membrane fuel cells (AMFCs) has become active. Compared with the proton-exchange membrane fuel cell (PEMFC)，one of the main advantages of the AMFC is that non-noble metal catalysts can be used to replace commercial Pt/C，thereby avoiding the instability of non-noble metals in an acid environment. A membrane electrode assembly (MEA) is the core component of fuel cells，and it restricts the fuel cell performance. A catalyst layer composed of a catalyst and an ionomer is the main component of the MEA. The ionomer content determines the pore size and distribution，thereby affecting the electrochemical reaction rate，oxygen diffusion，and water transport. More\u0002over，the contact between the catalyst layer and gas diffusion layer also influences the contact resistance. Therefore， tuning the microstructure of the catalyst layer is important to the fuel cell performance. At present，most researchers focus on the noble metal Pt/C catalyst layer，while the works on non-noble-metal catalyst layers are few，limiting their application in AMFCs. In this study，a laboratory-made non-noble metal catalyst Co-N-C and a commercial FAA-3 ionomer were used to fabricate a cathode catalyst layer of MEA，and the influence of the ionomer content in the Co-N-C catalyst layer structure was explored. The maximum performance of the fuel cell was found to be 139.7 mW/cm2 with the ionomer content of 40%，which was close to the performance of the fuel cell with a Pt/C catalyst layer.
Keyword_Chinese:碱性膜燃料电池；膜电极；非贵金属催化层；离聚物质量分数
Keywords_English:alkaline membrane fuel cell；membrane electrode；non-noble metal catalyst layer；ionomer content

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