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Journal of Applied Electrochemistry

, Volume 33, Issue 1, pp 29–36 | Cite as

New structures of thin air cathodes for zinc–air batteries

  • W.H. Zhu
  • B.A. Poole
  • D.R. Cahela
  • B.J. Tatarchuk
Article

Abstract

Thin composite cathodes for air reduction were manufactured using microfibre-based papermaking technology. The electrodes have a thin structural design, less than 0.15 mm in thickness. Composite cathode materials for oxygen reduction applications were fabricated by entrapping carbon particles in a sinter-locked network of 2–8 μm diameter metal fibres. The thin structure not only results in electrodes that are 30–75% thinner than those commercially available, but also offers an opportunity for custom-built air cathodes optimized for high-rate pulse applications. Using a thin composite structure for the air cathode in a zinc–air battery that is part of a zinc–air/capacitor hybrid is likely to increase the pulse capability of the hybrid power system. The thin cathode structure provides a better, more efficient three-phase reaction zone. In a half-cell test, the ultrathin air cathode generated more than 1.0 V vs Zn/ZnO for a current of 200 mA cm−2. Half-cell, full-cell and pulse-power tests revealed that thin composite cathodes have a better rate and pulse performance than the air cathodes commonly used.

gas diffusion electrodes microfibrous composite electrodes pulse power zinc air batteries 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • W.H. Zhu
    • 1
  • B.A. Poole
    • 1
  • D.R. Cahela
    • 1
  • B.J. Tatarchuk
    • 1
  1. 1.Department of Chemical Engineering and the Center for Microfibrous Materials ManufacturingAuburn UniversityAuburnUSA

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