Very high performance alkali anion-exchange membrane fuel cells

Kazuya Matsumoto, Tsuyohiko Fujigaya, Hiroyuki Yanagi, Naotoshi Nakashima

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

Anion-exchange membrane fuel cells (AEMFCs) have emerged as an alter-native technology to overcome the technical and cost issues of proton-exchange membrane fuel cells (PEMFCs). In this study, we describe a new electrocatalyst for AEMFCs composed of carbon nanotubes (CNTs), KOH-doped polybenzimidazole (PBI) and platinum nanoparticles (Pt), in which the CNTs are wrapped by KOH-doped PBI at a nanometer thickness and Pt is efficiently loaded on the wrapping layer. In the electrocatalyst, it is revealed that the CNTs and the KOH-doped PBI layer function as electron- and hydroxide-conductive paths, respectively, and the large exposed surface of the Pt allows an effective access of the fuel gas. Quantitative formation of the well-defined interfacial structure formed by these components leads to an excellent mass transfer in the catalyst interface and realizes a high fuel-cell performance. Membrane electrode assemblies fabricated with the electrocatalyst show a high power density of 256 mW cm-2. To the best of our knowledge, this is the highest value for AEMFC systems measured in similar experimental conditions.

Original languageEnglish
Pages (from-to)1089-1094
Number of pages6
JournalAdvanced Functional Materials
Volume21
Issue number6
DOIs
Publication statusPublished - Mar 22 2011

Fingerprint

Alkalies
Carbon Nanotubes
fuel cells
Anions
polybenzimidazole
Fuel cells
Electrocatalysts
alkalies
Ion exchange
Negative ions
electrocatalysts
anions
membranes
Membranes
Carbon nanotubes
carbon nanotubes
Gas fuels
Proton exchange membrane fuel cells (PEMFC)
Platinum
Mass transfer

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Very high performance alkali anion-exchange membrane fuel cells. / Matsumoto, Kazuya; Fujigaya, Tsuyohiko; Yanagi, Hiroyuki; Nakashima, Naotoshi.

In: Advanced Functional Materials, Vol. 21, No. 6, 22.03.2011, p. 1089-1094.

Research output: Contribution to journalArticle

Matsumoto, Kazuya ; Fujigaya, Tsuyohiko ; Yanagi, Hiroyuki ; Nakashima, Naotoshi. / Very high performance alkali anion-exchange membrane fuel cells. In: Advanced Functional Materials. 2011 ; Vol. 21, No. 6. pp. 1089-1094.
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