4.8 Article

Template-directed fabrication of porous gas diffusion layer for magnesium air batteries

Journal

JOURNAL OF POWER SOURCES
Volume 297, Issue -, Pages 202-207

Publisher

ELSEVIER
DOI: 10.1016/j.jpowsour.2015.06.141

Keywords

Porous gas diffusion layer; Mg air battery; Fuel cell; Silica template; Carbon fiber felt

Funding

  1. Ningbo Natural Science Foundation [2015A610251]
  2. National Natural Science Foundation of China [21103212]
  3. Ningbo Science and Technology Innovation Team [2012B82001]

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The uniform micropore distribution in the gas diffusion layers (GDLs) of the air-breathing cathode is very important for the metal air batteries. In this work, the super-hydrophobic GDL with the interconnected regular pores is prepared by a facile silica template method, and then the electrochemical properties of the Mg air batteries containing these GDLs are investigated. The results indicate that the interconnected and uniform pore structure, the available water-breakout pressure and the high gas permeability coefficient of the GDL can be obtained by the application of 30% silica template. The maximum power density of the Mg air battery containing the GDL with 30% regular pores reaches 88.9 mW cm(-2) which is about 1.2 times that containing the pristine GDL Furthermore, the GDL with 30% regular pores exhibits the improved the long term hydrophobic stability. (C) 2015 Elsevier B.V. All rights reserved.

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