尹 燕,刘 洋,祝伟康,张俊锋
AuthorsHTML:尹 燕，刘 洋，祝伟康，张俊锋
AuthorsListE:Yin Yan,Liu Yang,Zhu Weikang,Zhang Junfeng
AuthorsHTMLE:Yin Yan，Liu Yang，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:改善阳极水管理是碱性阴离子交换膜(AEM)燃料电池重要的研究课题．在质子交换膜燃料电池(PEMFC) 阴极研究中，发现改变催化层内部结构能够有效改善阴极的水管理能力，然而目前关于 AEM 燃料电池催化层相关 研究较少．本研究针对 AEM 燃料电池阳极水分布特点，利用 Pt/C 和 PtRu/C 催化剂在碱性条件下氢氧化反应 (HOR)的活性差异，设计了双层催化剂结构．当活性较高的 PtRu/C 层靠近气体扩散层，活性较低 Pt/C 层靠近 AEM 时，双催化层形成与单一催化层水分布相反的活性梯度，能够有效改善水分布，在测试温度为 30 ℃和 100%相对湿 度时，获得较高峰值功率密度 88.1 mW/cm2 ．研究成果为碱性膜燃料电池的阳极催化层结构设计提出一种新思路．
Abstract_English:Improving water transport behavior within the anode catalyst layer is an important research topic for anion\u0002exchange membrane (AEM) fuel cells. For proton-exchange membrane fuel cells (PEMFCs)，the catalyst layer mi\u0002crostructure has been found to significantly influence the water management，while there is a lack of study on the anode catalyst layer for AEM fuel cells. In this work，we utilize the hydrogen oxidation reaction (HOR) activity dif\u0002ference between Pt/C and PtRu/C catalysts to design anode dual catalyst layers (ADCLs) to improve the water man\u0002agement. The results indicate that the ADCL with the PtRu/C layer close to the gas diffusion layer and the Pt/C close to the AEM form a reactivity gradient that is opposite to the water gradient in the PtRu/C or Pt/C catalyst layer， leading to better water transport in the anode. At 30 ℃ and a relative humidity of 100%，the maximum peak power density was achieved as 88.1 mW/cm2 . The results of this study will provide a novel idea for the design of anode cata\u0002lyst layers in AEM fuel cells.
Keyword_Chinese:碱性膜燃料电池；水管理；双层催化层
Keywords_English:anion-exchange membrane fuel cell；water management；anode dual catalyst layers

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