Low Temperature Combustion Synthesis and Electrochemical Performance of xLi2MnO3-(1-x)LiNi0.7Co0.3O2

The cathode materials for lithium ion batteries xLi(2)MnO(3)-(1-x)LiNi0.7Co0.3O2 were prepared via low temperature combustion process. The structure, morphology and electrochemical performance of the synthesized materials were studied systematically. The optimal preparing conditions and the optimal ratio of Li2MnO3 for the cathode materials were studied by single factor experiment. The experimental results show that the synthesized products have alpha-NaFeO(2)layered structure, sphere-like morphology and excellent electrochemical performance; the optimal conditions to prepare these materials are to reheat the combustion products at 850 degrees C for 20 h, the optimal ratio of Li2MnO3 is x =0.7. The cathode material 0.7Li(2)MnO(3)-0.3LiNi(0.7)Co(0.3)O(2) synthesized under such conditions has the highest discharge capacity of 263.1 mAh.g(-1), excellent cycle and rate performance.