Hydrothermal Synthesis of Mn-doped VO2 (B) as Cathode Material for Lithium-ion Battery

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Han, Shichang^1 ; Zou, Zhengguang^1 ; Huo, Shuailei^1

College of Material Science and Engineering, Guilin University of Technology, Guang'xi, Guilin

541004, China^1

关键词: Cath-ode materials;    Cycle performance;    Discharge specific capacity;    Electrochemical performance;    Galvanostatic charge discharges;    Hydrothermal reaction;    Initial discharge capacities;    Specific capacities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/2/022059/pdf
DOI  :  10.1088/1757-899X/382/2/022059

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Mn-doped VO2(B) was synthesized via a hydrothermal reaction from manganese sulfate (MnSO4) and Vanadyl oxalate (VOC2O4•5H2O). The effects of the content of Mn on the electrochemical performance of material were studied by means of galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). Compared with pure material VO2(B), the MnxVO2(B) which was doped with little Mn(x=0.01,0.02,0.05) had higher specific capacity and more preferable cycle performance. When galvanostatic charged-discharged with 0. 1 C in 1.5-4.0 V. the initial discharge specific capacity of sample Mn1, Mn2 and Mn3 were 204 mAh g-1, 242 mAh g-1 and 249 mAh g-1 respectively larger than pure VO2 sample (181mAh g-1). In particular, the sample of Mn1 exhibited best electrochemical performance. The initial discharge capacity maintained 164 mAh g-1 after 50 cycles. The retention rate of capacity was 80%.