• 文献标题:   Enhanced stability of multilayer graphene-supported catalysts for polymer electrolyte membrane fuel cell cathodes
  • 文献类型:   Article
  • 作  者:   MARINKAS A, HEMPELMANN R, HEINZEL A, PEINECKE V, RADEV I, NATTER H
  • 作者关键词:   fuel cell cathode, longterm stability, multilayer graphene, platinum catalyst, polarization curve analysi
  • 出版物名称:   JOURNAL OF POWER SOURCES
  • ISSN:   0378-7753 EI 1873-2755
  • 通讯作者地址:   Univ Saarland
  • 被引频次:   11
  • DOI:   10.1016/j.jpowsour.2015.06.126
  • 出版年:   2015

▎ 摘  要

One of the biggest challenges in the field of polymer electrolyte membrane fuel cells (PEMFC) is to enhance the lifetime and the long-term stability of PEMFC electrodes, especially of cathodes, furthermore, to reduce their platinum loading, which could lead to a cost reduction for efficient PEMFCs. These demands could be achieved with a new catalyst support architecture consisting of a composite of carbon structures with significant different morphologies. A highly porous cathode catalyst support layer is prepared by addition of various carbon types (carbon black particles, multi-walled carbon nanotubes (MWCNT)) to multilayer graphene (MLG). The reported optimized cathodes shows extremely high durability and similar performance to commercial standard cathodes but with 89% lower Pt loading. The accelerated aging protocol (AAP) on the membrane electrode assemblies (MEA) shows that the presence of MLG increases drastically the durability and the Pt-extended electrochemical surface area (ECSA). In fact, after the AAP slightly enhanced performance can be observed for the MLG-containing cathodes instead of a performance loss, which is typical for the commercial carbon-based cathodes. Furthermore, the presence of MLG drastically decreases the ECSA loss rate. The MLG-containing cathodes show up to 6.8 times higher mass-normalized Pt-extended ECSA compared to the commercial standard systems. (C) 2015 Elsevier B.V. All rights reserved.