锂离子蓄电池锂锰氧化物正极活性材料

Positive active materials of lithium manganese oxides for lithium-ion batteries

综述了锂离子蓄电池正极活性材料锂锰氧化物目前的研究进展。介绍了国内外有关尖晶石LiMn2 O4 、无定形二氧化锰、层状m LiMnO2 和盐岩o LiMnO2 的研究工作。掺杂和表面处理是提高尖晶石LiMn2 O4 电化学性能的主要手段。无定形二氧化锰、层状m LiMnO2 和岩盐o LiMnO2 具有比尖晶石LiMn2 O4 更高的比容量 ,但有放电电压低和循环性能差的缺点。掺杂、表面处理和合成短程有序、长程无序的岩盐o LiMnO2 将成为今后锂锰氧化物材料的研究发展方向。

The recent progress in the positive active materials of lithium manganese oxides for lithium-ion batteries was reviewed. The worldwide research works of spinel LiMn 2O 4, amorphous manganese dioxide, layered m-LiMnO 2, rock salt o-LiMnO 2 were introduced. Doping and surface treatment were two main methods for improving the electrochemical performance of spinel LiMn 2O 4. Amorphous manganese doxide, layered m-LiMnO 2 and rock salt o-LiMnO 2 had higher specific capacity than spinel LiMn 2O 4, and had disadvantages of low discharge potential and poor cycle performance. The further research work of lithium manganese oxides will be doping, surface treatment and synthesis of rock salt o-LiMnO 2 which is ordered in short distance and disordered in long distance.