High performance cathode based on carbon fiber felt for magnesium-air fuel cells |
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Authors: | Chaozhu Shu Erdong Wang Luhua Jiang Gongquan Sun |
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Affiliation: | 1. Fuel Cell & Battery Division, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China;2. University of Chinese Academy of Science, Beijing 100039, China |
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Abstract: | A series of carbon fiber felt/PTFE based gas diffusion layers (GDL) for Mg-air fuel cells were prepared by a simple method of immersing carbon fiber felt in PTFE suspension. Critical properties of the as-prepared GDL, including the surface morphology, electronic resistivity, porosity and gas permeability, have been characterized to investigate the effect of PTFE suspension concentration and PTFE content on the properties of the GDL. The micrographs indicated that the PTFE was homogenously dispersed on the carbon fiber felts and showed structure with a microporous layer. The as-prepared GDL exhibited good mechanical property, high electronic conductivity, sufficient water repellency and high gas permeability. Compared with the Mg-air fuel cell with a traditional carbon powder based cathode, the performance and the stability of Mg-air fuel cell with the carbon fiber felt based GDL are improved significantly. |
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Keywords: | Carbon fiber felt Gas diffusion layer Cathode Magnesium-air fuel cell |
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