发明授权
US08703355B2 Catalytic electrode with gradient porosity and catalyst density for fuel cells
有权
催化电极具有梯度孔隙率和燃料电池的催化剂密度
- 专利标题: Catalytic electrode with gradient porosity and catalyst density for fuel cells
- 专利标题(中): 催化电极具有梯度孔隙率和燃料电池的催化剂密度
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申请号: US12839124申请日: 2010-07-19
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公开(公告)号: US08703355B2公开(公告)日: 2014-04-22
- 发明人: Chun Zhang , Wei Zhu , Jian-ping Zheng , Zhiyong Liang , Ben Wang
- 申请人: Chun Zhang , Wei Zhu , Jian-ping Zheng , Zhiyong Liang , Ben Wang
- 申请人地址: US FL Tallahassee
- 专利权人: Florida State University Research Foundation, Inc.
- 当前专利权人: Florida State University Research Foundation, Inc.
- 当前专利权人地址: US FL Tallahassee
- 代理机构: Novak Druce Connolly Bove + Quigg LLP
- 代理商 Gregory A. Nelson
- 主分类号: H01M8/10
- IPC分类号: H01M8/10 ; H01M4/88
摘要:
A membrane electrode assembly (MEA) for a fuel cell comprising a gradient catalyst structure and a method of making the same. The gradient catalyst structure can include a plurality of catalyst nanoparticles, e.g., platinum, disposed on layered buckypaper. The layered buckypaper can include at least a first layer and a second layer and the first layer can have a lower porosity compared to the second layer. The gradient catalyst structure can include single-wall nanotubes, carbon nanofibers, or both in the first layer of the layered buckypaper and can include carbon nanofibers in the second layer of the layered buckypaper. The MEA can have a catalyst utilization efficiency of at least 0.35 gcat/kW or less.