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α-MnO2 Nanowires: A Catalyst for the O2 Electrode in Rechargeable Lithium Batteries


  • P. G. B. is indebted to the EPSRC for financial support.


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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.