气体扩散电极参数对阴离子交换膜燃料电池性能的影响

doi:10.1016/S1872-2067(14)60050-4

催化学报 ›› 2014, Vol. 35 ›› Issue (7): 1091-1097.DOI: 10.1016/S1872-2067(14)60050-4

气体扩散电极参数对阴离子交换膜燃料电池性能的影响

杨冬蕾^a,b, 俞红梅^a, 李光福^a, 宋微^a, 刘艳喜^a, 邵志刚^a

a. 中国科学院大连化学物理研究所, 清洁能源国家实验室, 辽宁大连116023;
b. 中国科学院大学, 北京100049

收稿日期:2013-12-13 修回日期:2014-01-23 出版日期:2014-06-28 发布日期:2014-06-28
通讯作者: Hongmei Yu
基金资助:
国家高技术研究发展计划（863计划， 2011AA050705）；国家重点基础研究发展计划（973计划， 2012CB215500）；国家自然科学基金（21176234， 21203191）.

Effect of gas diffusion electrode parameters on anion exchange membrane fuel cell performance

Donglei Yang^a,b, Hongmei Yu^a, Guangfu Li^a, Wei Song^a, Yanxi Liu^a, Zhigang Shao^a

a. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, Liaoning, China;
b. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2013-12-13 Revised:2014-01-23 Online:2014-06-28 Published:2014-06-28
Supported by:
This work was supported by the National High Technology Research and Development Program of China (863 Program, 2011AA050705), the National Basic Research Program of China (973 Program, 2012CB215500), and the National Natural Science Foundation of China (21176234 and 21203191).

摘要/Abstract

摘要：

优化了碱性阴离子交换膜燃料电池（AAEMFC）使用的气体扩散电极（GDE），发现催化层中PTFE含量与催化剂担载量对电池性能与其电化学动力学特征影响很大.采用i-V曲线，开路电压，电池内阻与在线的电化学阻抗谱与动力学分析，评估了所制GDE的电化学性能.在所研究的AAEMFC电极催化层中，PTFE的最佳含量是20%，Pt载量对膜电极三相界面、催化层导电性与催化剂利用率的影响极大.当制备的GDE催化层中Pt/C的Pt载量为1.0mg/cm²，PTFE含量为20%时，AAEMFC的峰电流密度在50^oC达到了213mW/cm².兼顾Pt催化剂的利用率与成本，在没有明显影响电池性能的情况下，Pt的担载量可降至0.5mg/cm².

关键词: 碱性阴离子交换膜燃料电池, 气体扩散电极, PTFE含量, 催化剂担载量, 三相界面

Abstract:

Focused on the optimization of the gas diffusion electrode (GDE) in an alkaline anion exchange membrane fuel cell (AAEMFC), PTFE content and catalyst loading in the catalyst layer (CL) were found to have a substantial effect on the cell performance and electrochemical kinetics. The i-V curves, open circuit voltage, cell resistance, in-situ electrochemical impedance spectroscopy and kinetics analysis have been used to evaluate the electrochemical properties of the fabricated GDEs. The results reveal that the optimum PTFE content in the CL of AAEMFC is 20%. Pt loading ranged from 0.2-1.0 mg/cm² was also investigated as a vital parameter for three-phase boundary, CL conductivity and catalyst utilization. Ultimately, the highest peak power density of 213 mW/cm² was achieved at 50℃ from the prepared GDE with Pt loading of 1.0 mg/cm² on Pt/C and 20% PTFE in CL of AAEMFC. Considering the Pt-based catalyst effective utilization and cost, however, the platinum requirement can be diminished to close to 0.5 mg/cm² in CLwithout significant performance loss.

Key words: Alkaline anion exchange membrane fuel cell, Gas diffusion electrode, PTFE content, Catalyst loading, Three phase boundary

杨冬蕾, 俞红梅, 李光福, 宋微, 刘艳喜, 邵志刚. 气体扩散电极参数对阴离子交换膜燃料电池性能的影响[J]. 催化学报, 2014, 35(7): 1091-1097.

Donglei Yang, Hongmei Yu, Guangfu Li, Wei Song, Yanxi Liu, Zhigang Shao. Effect of gas diffusion electrode parameters on anion exchange membrane fuel cell performance[J]. Chinese Journal of Catalysis, 2014, 35(7): 1091-1097.

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气体扩散电极参数对阴离子交换膜燃料电池性能的影响

Effect of gas diffusion electrode parameters on anion exchange membrane fuel cell performance

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