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Mg-doped cathode materials LiMn 1.96 Mg 0.04 O 4 were synthesized at 500℃ for different calcining time by solid-state combustion method. The effects of calcining time on the crystal structure and microstructure were analyzed by scanning electron microcopy (SEM) and X-ray diffraction (XRD), the electrochemical properties were characterized by charge-discharge cycling test, cyclic voltammetry (CV) measurement and electrochemical impedance spectroscopy (EIS). The results showed that all samplesdoi:10.20964/2016.11.71 fatcat:jqp4gc56g5bfvjanrgu7y75bde