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Keywords:

  • batteries;
  • energy conversion;
  • lithium;
  • manganese;
  • nanomaterials
Thumbnail image of graphical abstract

Higher-capacity lithium batteries can be fabricated by using α-MnO2 nanowires as the catalyst in a porous, composite oxygen cathode. In the depicted scanning electron micrograph of a composite positive electrode, deposits of Li2O2, which accumulates during discharge, can be seen within a porous matrix consisting of α-MnO2 and carbon.