High-Performance Hydroxide Exchange Membrane Fuel Cell Comprising an Atomic Layer-Deposited Silver Cathode

Jong Seon Park, Beum Geun Seo, Junmo Koo, Jin Hyuk Lim, Yong Seok Lee, Gwon Deok Han, Fritz B. Prinz, Joon Hyung Shim

Research output: Contribution to journalArticlepeer-review

Abstract

Atomic layer deposition (ALD) is emerging as an efficient tool for the precise manufacture of catalysts, owing to its sophisticated surface tailoring capabilities. To overcome the techno-economic limitations of fuel cell electric vehicles (FCEVs), which are considered suitable alternatives to battery electric vehicles (BEVs), the development of cost-efficient high-performance catalysts is essential. In this study, we successfully fabricated a Pt-free cathode for a hydroxide exchange membrane fuel cell (HEMFC) with excellent oxygen reduction activity under extremely low loading of Ag electrocatalysts using ALD. Microstructural analysis confirmed that the surface modification by ALD-Ag nanoparticles exhibited excellent step coverage characteristics on porous carbon nanotubes (CNTs). An HEMFC comprising a CNT cathode surface-decorated with ALD-Ag nanoparticles delivered a high peak power density of 2154 mW mgAg-1 in an alkaline environment at 65 °C. This study demonstrates the applicability of ALD for the manufacture of highly active low-cost electrocatalysts for high-performance HEMFCs.

Original languageEnglish
Pages (from-to)7825-7830
Number of pages6
JournalNano Letters
Volume23
Issue number17
DOIs
Publication statusPublished - 2023 Sept 13

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

Keywords

  • PGM-free catalyst
  • atomic layer deposition
  • cathode
  • hydroxide exchange membrane fuel cell
  • silver

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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