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邓光荣

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供职机构:中国科学院长春应用化学研究所更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划更多>>
相关领域:理学电气工程更多>>

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Cathode catalytic dependency behavior on ionomer content in direct methanol fuel cells
2016年
Cathode catalyst layers (CLs) with varying ionomer (Nation) contents were prepared and the direct methanol fuel cell structure and catalytic behavior were investigated as a function of ionomer content. CL roughness and thickness increased with increasing Nation content. Contact angle measurements determined that CL hydrophilicity also increased as a function of Nation content. Poor bonding between the CL, microporous layer, and the proton exchange membrane was obtained when the ionomer content was too low. The electrochemical surface areas (ESAs) were found to increase with increasing Nation content before reaching an asymptote at elevated loading levels. However, upon increasing the ionomer content above 30 wt.%, the water and oxygen mass transler properties were difficult to control. Considering the above conditions, N30 (:30 wt.% Nation) was found to be the optimal level to effectively extend the three-phase boundaries and enhance cell performance.
龙志邓光荣刘长鹏葛君杰邢巍马树华
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