γ-MnOOH纳米棒的低温水热制备及其电化学性能

硅酸盐通报 ›› 2018, Vol. 37 ›› Issue (1): 206-209.

γ-MnOOH纳米棒的低温水热制备及其电化学性能

孙平;朱刚;李朋娜;周跃花;李江涛

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

出版日期:2018-01-15 发布日期:2021-01-18
基金资助:
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)

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

SUN Ping;ZHU Gang;LI Peng-na;ZHOU Yue-hua;LI Jiang-tao

Online:2018-01-15 Published:2021-01-18

摘要/Abstract

摘要： 采用低温水热法,在弱碱性介质中氧化MnSO4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100~150 nm之间,长度约为2 μm.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100 mA/g的电流密度下,首次放电比容量高达1454 mAh/g.恒流充放电100次后,比容量仍达到720 mAh/g.

关键词: 碱式氧化锰;水热制备;负极材料;锂离子电池

Abstract: γ-MnOOH was prepared with a low-temperature hydrothermal method by means of oxidizing MnSO4in weak alkaline media.The structure and morphology were characterized by X-ray diffraction and scanning electron microscopy.The γ-MnOOH 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 of 1454 mAh/g at the current density of 100 mA/g.And the capacity can reach 720 mAh/g even after 100 cycles.

Key words: manganite;hydrothermal preparation;negative material;lithium-ion battery

中图分类号:

O614.7+11

孙平;朱刚;李朋娜;周跃花;李江涛. γ-MnOOH纳米棒的低温水热制备及其电化学性能[J]. 硅酸盐通报, 2018, 37(1): 206-209.

SUN Ping;ZHU Gang;LI Peng-na;ZHOU Yue-hua;LI Jiang-tao. Preparation of γ-MnOOH Nanorods by Low-temperature Hydrothermal Method and Its Improved Electrochemical Performance[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2018, 37(1): 206-209.