高容量LiMnO_2正极合成与电化学性能研究  

Preparation and electrochemistry of high-capacity LiMnO_2

作　　者：陈培雷 胡博 耿海龙 杨瑞枝[1] 徐艳辉[1] 

机构地区：[1]苏州大学物理与光电能源学部苏州纳米科技协同创新中心,苏州215006 [2]湖州创亚动力电池材料有限公司,湖州313000 [3]山东齐星新材料科技有限公司,滨州256200

出　　处：《化工新型材料》2017年第7期168-170,共3页New Chemical Materials

基　　金：国家自然科学基金(51272167和51572181)

摘　　要：分别使用Mn_2O_3和MnOOH作为前驱体,通过水热法合成了层状结构LiMnO_2。Mn_2O_3前驱体合成的材料具有更高的初始放电容量,高于170mAh/g,同时具有更好的循环性能;MnOOH前驱体制备的样品具有更高的交换电流,红外光谱测试发现MnOOH前驱体制备的LiMnO_2中存在—OH官能团。Layered LiMnO2 was synthesized successfully by hydrothermal method. Two different precursors,i. e.,Mn2O3 and MnOOH,were used to synthesize the final sample. It was found that LiMnO2 prepared by Mn2O3 precursor exhibited larger initial discharge capacity of more than 170 mAh/g and better cycle stability. While the sample prepared by MnOOH precursor showed higher exchange current. IR measurement showed that there existed -OH group in LiMnO2 sample prepared by MnOOH precursor.

关 键 词：LIMNO2 交换电流 锂嵌入 电位阶跃 

分 类 号：TQ131.11[化学工程—无机化工]