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Keywords:

  • fuel cells;
  • composites;
  • membranes;
  • proton transport;
  • selectivity
Thumbnail image of graphical abstract

Peels of an onion: New composite proton exchange membranes prepared through layer-by-layer coating of a biopolymer has shown superior methanol barrier properties, while maintaining a high affinity to proton transfer same time. The highly selective skin layer in the composite system significantly increases the fuel utilization efficiency in direct methanol fuel cells (DMFCs).