Patent ID: 9077042
Filing Date: 2015-07-07
Classification: H01M,Y02E

Abstract:
1. A membrane electrode assembly comprising: a proton exchange membrane comprising a first surface and a second surface; an anode on the first surface, wherein the anode comprises a carbon nanotube structure and a biofuel catalyst; the carbon nanotube structure comprises a plurality of carbon nanotubes and a catalyst material dispersed therein, the catalyst material comprises metal particles; and the biofuel catalyst is dispersed on a surface of the plurality of carbon nanotubes, the carbon nanotube structure comprises at least one drawn carbon nanotube film, the at least one drawn carbon nanotube film comprises a plurality of carbon nanotube segments successively oriented along a fixed direction, and joined end-to-end longitudinally along the fixed direction, by van der Waals attractive force therebetween; and a cathode on the second surface, wherein the cathode is double-layer structure comprising a diffusion layer and a catalyst layer in contact with the diffusion layer, the catalyst layer is located between the second surface and the diffusion layer, the catalyst layer comprises a plurality of catalyst materials and a plurality of carbon particles, and the diffusion layer comprises a carbon nanotube structure comprising at least one drawn carbon nanotube film, and the at least one carbon nanotube film comprises a plurality of carbon nanotube segments successively oriented along a fixed direction, and joined end-to-end longitudinally along the fixed direction, by van der Waals attractive force therebetween, wherein each carbon nanotube segment comprises a plurality of carbon nanotubes parallel to each other and combined by van der Waals attractive force therebetween, and the carbon nanotubes of the at least one drawn carbon nanotube film are oriented along the fixed direction.