中文摘要：

采用氢氧化物共沉淀法制备出Ni0.43Mn0.57（OH）2前驱体,与Li2CO3混合制备了锂离子电池正极材料Li1.07Ni0.4Mn0.53O2,利用SEM、XRD对所得试样的形貌和晶体结构进行了表征,并研究了材料的电化学性能。结果表明：950℃下保温16h所得Li1.07Ni0.4Mn0.53O2具有良好的倍率性能和循环稳定性,2.75~4.2V、90mA/g（0.5C）下Li1.07Ni0.4Mn0.53O2的首次放电比容量达到127.11mAh/g,100次循环后容量保持率为98.99%。

英文摘要：

Lil. 07 Ni0. 4Mn0. 53O2 was synthesized through mixing Lil. 07 Ni0. 4Mn0. 53O2 （OH）2 precursor pre- pared by hydroxide co-precipitation method. The morphologies and crystal structure of Lil. o7 Ni0. 4 Mno. 53 02 were cha- racterized by SEM and XRD, respectively. The electrochemical properties were also investigated. The results showed that the Lil. 07 Ni0. 4Mn0. 53O2 synthesized at 950 ℃ for 16 h exhibited excellent rate capability and cycling stability. When cycled at 25 ℃, 2.75--4. 2 V with a current density of 90 mA/g （0. 5C）, the Lil.07Nio.4Mno. saO2 achieved an initial discharge specific capacity of 127.11 mAh/g, and capacity retention was 98. 99% after 100 cycles.