Ag掺杂VO2(B)正极材料的合成及其电化学性能

doi:10.11949/j.issn.0438-1157.20170812

化工学报 ›› 2018, Vol. 69 ›› Issue (4): 1741-1748.DOI: 10.11949/j.issn.0438-1157.20170812

• 材料化学工程与纳米技术 • 上一篇下一篇

Ag掺杂VO₂(B)正极材料的合成及其电化学性能

韩世昌, 邹正光, 吕婷婷, 吴星宇, 杨倩

桂林理工大学材料科学与工程学院, 有色金属及材料加工新技术教育部重点实验室, 广西桂林 541004

收稿日期:2017-06-26 修回日期:2017-07-11 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 邹正光
基金资助:
国家自然科学基金项目（51562006）。

Synthesis and electrochemical performance of Ag-doped VO₂(B) as cathode materials

HAN Shichang, ZOU Zhengguang, LÜ Tingting, WU Xingyu, YANG Qian

Key Laboratory of New Processing Technology for Nonferrous Metals, Ministry of Education, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China

Received:2017-06-26 Revised:2017-07-11 Online:2018-04-05 Published:2018-04-05
Supported by:
supported by the National Natural Science Foundation of China (51562006).

摘要/Abstract

摘要：

以V₂O₅、C₁₂H₂₂O₁₁和AgNO₃为原料，采用水热法制备Ag掺杂VO₂（B）正极材料，通过XRD、FESEM、XPS、EDS、循环伏安（CV）、交流阻抗（EIS）等表征手段，研究掺Ag对VO₂（B）的结构、形貌及电化学性能的变化规律。结果表明，当掺杂量为0.43%（atom）时，样品（Ag₁）首次放电比容量为340.5 mA·h·g^-1，较未掺杂样品（Ag₀）提高了80.5%。当掺杂量为1.28%（atom）时，样品（Ag₃）表现出最好的循环稳定性，首次放电容量为213.6 mA·h·g^-1，100次循环后，容量保持率为58.3%。

关键词: 锂离子电池, 电化学性能, 正极材料, VO₂(B), 银掺杂, 水热法

Abstract:

Ag-doped VO₂(B) cathode material was fabricated by hydrothermal reaction. Vanadium pentoxide (V₂O₅₎, maltose (C₁₂H₂₂O₁₁) and silver nitrate (AgNO₃) were used as starting materials. The physical properties of samples were characterized by X-ray diffraction, XPS, FESEM and EDS. Meanwhile, the electrochemical performance of material were observed with means of galvanostatic charge-discharge, cyclic voltammetry(CV) and electrochemical impedance spectroscopy (EIS). The results showed that the specific discharge capacity of the sample of Ag₁[0.43%(atom)] was 340.5 mA·h·g^-1 at 0.1C rate over the voltage range of 1.5-4.0 V, which was increased by 80.5% than the pure sample. The sample of Ag₃[1.28%(atom)] exhibited the optimal electrochemical performance. The initial discharge capacity maintained 213.6 mA·h·g^-1 after 100 cycles. The retention rate of capacity was 58.3%.

Key words: lithium ion battery, electrochemical performance, cathode material, VO₂(B), silver doping, hydrothermal method

中图分类号:

TQ028.8

韩世昌, 邹正光, 吕婷婷, 吴星宇, 杨倩. Ag掺杂VO₂(B)正极材料的合成及其电化学性能[J]. 化工学报, 2018, 69(4): 1741-1748.

HAN Shichang, ZOU Zhengguang, LÜ Tingting, WU Xingyu, YANG Qian. Synthesis and electrochemical performance of Ag-doped VO₂(B) as cathode materials[J]. CIESC Journal, 2018, 69(4): 1741-1748.

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Ag掺杂VO₂(B)正极材料的合成及其电化学性能

Synthesis and electrochemical performance of Ag-doped VO₂(B) as cathode materials

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