Citation: XIONG Li-Long, XIAO Xiang, XU You-Long, WANG Ji-Sheng. Syntheses and Electrochemical Characterization of Li-Rich Li₂Mn_1-xTi_xO₃ Layered Materials Used for Lithium Ion Batteries[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(2): 269-275. doi: 10.11862/CJIC.2017.004 shu

Syntheses and Electrochemical Characterization of Li-Rich Li₂Mn_1-xTi_xO₃ Layered Materials Used for Lithium Ion Batteries

1.
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
2.
International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, China

Corresponding author: XU You-Long, ylxuxjtu@mail.xjtu.edu.cn
Received Date: 10 May 2016
Revised Date: 15 October 2016

Figures(8)

Ti-doped Li₂MnO₃ is synthesized by a conventional solid-state reaction. Scanning electron microscopy, X-ray diffraction and X-ray photoelectric spectroscopy analyses indicate Ti is successfully doped into Li₂MnO₃ structure and the doping could suppress agglomeration of primary particlesis efficiently. Electrochemical impedance spectroscopy and galvanostatic charge/discharge results show that, in the voltage window of 2.0~4.6 V (vs Li/Li⁺), doped sample Li₂Mn_0.97Ti_0.03O₃ delivers an initial discharge capacity of 209 mAh·g^-1 with 99.5% coulombic efficiency; after 40 cycles the capacity retention is 94%. Even the current density increases to 400 mA·g^-1, the doped sample could still deliver 120 mAh·g^-1 capacity, which is more than twice of that of undoped Li₂MnO₃ (52 mAh·g^-1). Ti-doped Li₂MnO₃ show greatly improved cycling stability and rate performance, which is beneficial for promoting the commercial application of Li₂MnO₃ material.
- lithium-ion battery,
- cathode material,
- doping,
- cycling stability,
- rate performance
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沈阳化工大学材料科学与工程学院沈阳 110142

Syntheses and Electrochemical Characterization of Li-Rich Li2Mn1-xTixO3 Layered Materials Used for Lithium Ion Batteries

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通讯作者: 陈斌, bchen63@163.com

Syntheses and Electrochemical Characterization of Li-Rich Li₂Mn_1-xTi_xO₃ Layered Materials Used for Lithium Ion Batteries