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1、锂离子电池尖晶石氧化锰锂 正极材料的研究 摘 要 锂离子电池在现代新能源中扮演着越来越重要的角色，在目前商品化锂离子电池中，正极材料主要还是氧化钴锂，而钴的数量有限，锂离子电池消耗钴量不少。另一方面，钴的价格最高，镍的价格其次，而锰的价格是最低的，由于我国的锰储量最丰富，应用氧化锰锂材料可以大大降低成本，而且锰无毒，污染小人们对回收利用问题在一次锂电池中已经积累丰富的经验，因此氧化锰锂成为正极材料研究的热点。锰氧化材料比较多，主要有三种结构：隧道结构，层状结构和尖晶石结构。研究氧化锰锂材料主要有尖晶石结构的LiMn2O4，Li4Mn5O9和Li4Mn5O12，以及层状结构的Li
2、MnO2。 对于LiMn2O4,通过引入适当的杂原子和采用新的溶胶—凝胶法制备可以有效的克服Jahn-Teller效应所造成的容量衰容减现象。当然通常制备LiMn2O4的方法是固相制备法。Li4Mn5O9,Li4Mn5O12可以用低温方法合成能作为锂离子电池理想的正极材料。层状结构的LiMnO2的容量比目前常用的正极材料质量容量均要高，可达270mAh/g，而且循环性能比较理想。随着电子技术的发展以氧化锰为正极锂离子电池将得到广泛的应用。 关键词：锂离子电池；正极材料；制备；发展；应用 II Research the spinel structure of lithium man
3、ganese oxide as the anode electrode in lithium-ion battery Abstract Lithium-ion batteries in the modern new energy play an increasingly important role in the current commercial lithium-ion batteries, cathode materials of lithium cobalt oxide is mainly, but a limited number of cobalt, cobalt li
4、thium-ion battery consumption a lot. On the other hand, the highest price of cobalt, nickel prices followed, but the price is the lowest manganese, because of China's most abundant reserves of manganese, the application of lithium manganese oxide can significantly reduce material costs, and man
5、ganese non-toxic, pollution, recovery of people Utilization in a lithium battery has been accumulated rich experience, so as cathode material of lithium manganese oxide of research. More manganese oxide materials, there are three structures: the tunnel structure, layered structure and spinel st
6、ructure. Study of lithium manganese oxide spinel structure materials are LiMn2O4, Li4Mn5O9 and Li4Mn5O12, and the layered structure of the LiMnO2. For LiMn2O4, by introducing appropriate complex atoms and introduction of new sol - gel method can effectively overcome the Jahn-Teller effect c
7、aused by the reduced capacity of the capacity decay phenomenon. Of course, the method is usually prepared by solid phase LiMn2O4 preparation method. Li4Mn5O9, Li4Mn5O12 can be synthesized at low temperature can serve as the ideal
