Synthesis and Performance of S-Co Co-doped LiMn_2O_4

To extend the charge/discharge voltage range of cathode material LixMn2O4 for Li-ion battery and elevate it's capacity on the basis of good cyclability, the synthesis and electrochemical performance of S-Co co-doped LiMn2O4 were researched. All the samples synthesized by the sol-gel method possess the structure of the pure cubic spinel phase and the crystallization is superior. The electrochemical performance of LiCo0.1Mn1.9O4-xSx is satisfying too. In voltage range of 2.4-4.3V, the initial capacity amounts to 170 mAh/g and it increases to some extent instead of decreasing after 30 cycles.