γ-MnOOH纳米棒的低温水热制备及其电化学性能  

Preparation of γ-MnOOH Nanorods by Low-temperature Hydrothermal Method and Its Improved Electrochemical Performance

作　　者：孙平[1] 朱刚[1] 李朋娜 周跃花[1] 李江涛[1] 

机构地区：[1]西安文理学院化学工程学院,陕西省表面工程与再制造重点实验室,西安710065

出　　处：《硅酸盐通报》2018年第1期206-209,共4页Bulletin of the Chinese Ceramic Society

基　　金：陕西省自然科学基金(2016JM2015); 西安市科技计划项目(2016CXWL08); 陕西省教育厅专项科研计划项目(15JK2148)

摘　　要：采用低温水热法,在弱碱性介质中氧化MnSO_4制备了γ-MnOOH。应用X-射线衍射和扫描电镜技术对所得材料的结构和形貌进行表征。γ-MnOOH直径在100~150nm之间,长度约为2μm。电化学测试结果表明,γ-MnOOH纳米棒负极材料具有高的比容量、优异的循环性能和倍率性能。在100mA/g的电流密度下,首次放电比容量高达1454mAh/g。恒流充放电100次后,比容量仍达到720mAh/g。γ-MnOOH was prepared with a low-temperature hydrothermal method by means of oxidizing MnSO_4 in weak alkaline media.The structure and morphology were characterized by X-ray diffraction and scanning electron microscopy.The γ-Mn OOH nanorods were about 2 μm in length and 100-150 nm in diameter.Electrochemical measurements indicate that γ-MnOOH shows high specific capacity,good cycling performance and rate capability as an anode material.It exhibits an initial discharge capacity of1454 m Ah/g at the current density of 100 m A/g.And the capacity can reach 720 m Ah/g even after 100 cycles.

关 键 词：碱式氧化锰 水热制备 负极材料 锂离子电池 

分 类 号：O614.711[理学—无机化学]