期刊
ELECTROCHIMICA ACTA
卷 220, 期 -, 页码 391-397出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.10.112
关键词
Lithium ion battery; Anode material; Hydrothermal synthesis; Manganese carbonate; Core-shell structure
资金
- Fundamental Research Funds of Shandong University
- National Natural Science Funds for Distinguished Young Scholars [51025211]
- Shandong Provincial independent innovation and achievement transformation special funds [2014ZZCX05501]
Cubic MnCO3@C composite was first synthesized using one-pot hydrothermal method. The prepared cubic MnCO3@C presented a homogeneous core-shell structure, which was composed of cubic MnCO3 as core, a mixture of amorphous carbon and MnCO3 as shell, and a separating interlayer. Compared to pure MnCO3, core-shell structured MnCO3@C exhibited better cycling stability, rate performance and recovery capability. It delivered a reversible capacity of 1020 mAh g(-1) which was 94.7% of the initial capacity, and a recovery capacity of 862 mAh g(-1) after 80 cycles under current density from 100 mA g(-1) to 10000 mA g(-1). The superior electrochemical performance of MnCO3@C could be attributed to the improved electronic conductivity and suppressed particle aggregation during the conversion reaction. Voltage profile and cyclic voltammetry test results showed active material transformation in both anode materials during the cycling process. Furthermore, the infrared spectra at different discharge/charge states showed that the conversion reactions of MnCO3 included not only the transition from MnCO3 to Mn, but also a further reaction from Li2CO3 to Li2O. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据