Abstract
Chemically delithiated Li0.13Mn0.54Ni0.13Co0.13O2−δ was synthesized by the reaction of Li1.2Mn0.54Ni0.13Co0.13O2 with NO2BF4. Charge and discharge tests for the Li0.13Mn0.54Ni0.13Co0.13O2−δ/Mg alloy cell showed high discharge capacity of 273 mA h g−1. Since the XANES spectra showed a shift toward lower energy in the transition metals after discharge, the reduction of the main phase was confirmed accompanied with Mg intercalation. Rietveld analysis revealed that the mixed phases of layered rock-salt and Li2MnO3 types were generated by Mg insertion during the discharge process.
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