微波合成的六方LiMnBO3及其碳包覆材料的结构特点及电化学性能

稀有金属材料与工程, 2014, 43(9): 2095-2099.

微波合成的六方LiMnBO3及其碳包覆材料的结构特点及电化学性能

阿孜古丽·木尔赛力木 ^1, , 马婷 ^2, , 粟智 ^3, , 尼加提·依里 ^4,

1.新疆师范大学,新疆乌鲁木齐830054 ;西北大学,陕西西安710069

2.新疆师范大学,新疆乌鲁木齐830054

3.新疆师范大学,新疆乌鲁木齐830054

4.新疆师范大学,新疆乌鲁木齐830054

基金项目: National Natural Science Foundation of China (21104063,21061015)

关键词：锂离子电池 , 正极材料 , LiMnBO3 , 微波合成 , 晶体结构

Structural Feature and Electrochemical Performance of h-LiMnBO3 and Its Carbon Coated Material Prepared by Microwave Synthesis

Keywords： Li-ion battery , cathode material , LiMnBO3 , microwave synthesis , crystal structure

采用微波合成法制备了LiMnBO3及其碳包覆材料LiMnBO3/C.考察了烧结温度和配料比对LiMnBO3结构的影响.利用XRD、SEM、HR-TEM对材料的结构和形貌进行了表征.通过恒电流充/放电性能及交流阻抗测试研究了材料的电化学性能.结果表明,实验所得LiMnBO3具有六方晶体结构(即制得h-LiMnBO3).750℃烧结温度下,反应25 min,且nLi∶nB∶nMn=1∶1∶1时,材料结晶较为完善、晶粒细小、形貌规整.碳包覆后材料充/放电性能及电导率均有提高.LiMnBO3/C的初次放电比容量达到50.3 mAh/g.

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微波合成的六方LiMnBO3及其碳包覆材料的结构特点及电化学性能

Structural Feature and Electrochemical Performance of h-LiMnBO3 and Its Carbon Coated Material Prepared by Microwave Synthesis

参考文献