4.8 Article

Nanopore Confinement of Electrocatalysts Optimizing Triple Transport for an Ultrahigh-Power-Density Zinc-Air Fuel Cell with Robust Stability

Journal

ADVANCED MATERIALS
Volume 32, Issue 47, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202003251

Keywords

nanopore confinement; oxygen reduction reaction; triple-phase interphases; zinc-air fuel cell

Funding

  1. Strategic Priority Research Program of Chinese Academy of Sciences [XDB36000000]
  2. National Basic Research Program of China [2017YFA0206702, 2017YFA0206703, 2017YFA0303500]
  3. Natural Science Foundation of China [21925110, 21890750, 21890754, 21890751, 91745113, 11621063]
  4. National Program for Support of Top-Notch Young Professionals
  5. Fundamental Research Funds for the Central Universities [WK 2060190084]
  6. Key Research Program of Frontier Sciences [QYZDY-SSW-SLH011]
  7. Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology

Ask authors/readers for more resources

Metal-air fuel cells with high energy density, eco-friendliness, and low cost bring significantly high security to future power systems. However, the impending challenges of low power density and high-current-density stability limit their widespread applications. In this study, an ultrahigh-power-density Zn-air fuel cell with robust stability is highlighted. Benefiting from the water-resistance effect of the confined nanopores, the highly active cobalt cluster electrocatalysts reside in specific nanopores and possess stable triple-phase reaction areas, leading to the synergistic optimization of electron conduction, oxygen gas diffusion, and ion transport for electrocatalysis. As a result, the as-established Zn-air fuel cell shows the best stability under high-current-density discharging (>90 h at 100 mA cm(-2)) and superior power density (peak power density: >300 mW cm(-2), specific power: 500 Wg(cat)(-1)) compared to most reported non-noble-metal electrocatalysts. The findings will provide new insights in the rational design of electrocatalysts for advanced metal-air fuel cell systems.

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