Synthesis of LiCoxNi1-xO2 cathode materials from electrolysis Co-Ni alloys

The LiCoxNi1-xO2 （x=0.2, 0.5 and 0.8） cathode materials were synthesized by sintering the mixtures of lithium salt and CoxNi1-x（OH）2 （x=0.2, 0.5 and 0.8） which were achieved from corresponding CoxNi1-x alloys by electrolysis technique. The structure and electrochemical characteristics of the obtained LiCoxNi1-xO2 were studied by XRD, SEM, PSCA and charge-discharge cycling test. The results show that the electrochemical capacities of the LiCoxNi1-xO2 （x=0.2, 0.5 and 0.8） materials are improved with the increase of the Ni content. The electrochemical performance of LiCo0.2Ni0.8O2 made in oxygen atmosphere has higher charge-discharge capacity and better cycleability compared with the one made in air atmosphere.