Synthesis and electrochemical properties of Cr-doped VO<sub>2</sub>(B) cathode materials

HOU Zhongliang; ZOU Zhengguang; WU Yi; WANG Jilin; WAN Zhendong; HAN Shichang

doi:10.11949/j.issn.0438-1157.20161263

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Synthesis and electrochemical properties of Cr-doped VO₂(B) cathode materials

更新时间：2025-12-10

- Synthesis and electrochemical properties of Cr-doped VO₂(B) cathode materials
- CIESC Journal Issue 4, Pages: 1691-1701(2017)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161263
  CLC： M911
- Online First：05 April 2017，
  
  Published：05 April 2017
- 稿件说明：
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HOU Zhongliang, ZOU Zhengguang, WU Yi, et al. Synthesis and electrochemical properties of Cr-doped VO₂(B) cathode materials[J]. CIESC Journal, 2017, (4): 1691-1701. DOI: 10.11949/j.issn.0438-1157.20161263.
DOI：

HOU Zhongliang, ZOU Zhengguang, WU Yi, et al. Synthesis and electrochemical properties of Cr-doped VO₂(B) cathode materials[J]. CIESC Journal, 2017, (4): 1691-1701. DOI: 10.11949/j.issn.0438-1157.20161263. DOI：

摘要

采用水热反应法，在合成过程中通过向反应体系中添加Cr（NO3（3·9H2O，制备出了Cr掺杂的VO2（B（。结合XRD、XPS、FESEM、EDS和FTIR等表征手段，研究了不同掺杂量对目标产物物相、结构和形貌的影响。电化学性能研究表明，当掺杂量（原子百分比，下同）为0.49%时，VO2（B（正极材料具有最佳的可逆容量和循环稳定性，其在电流倍率为0.1C时，样品的首次放电比容量为282 mA·h·g-1，较未掺杂样品高出36 mA·h·g-1，50次循环后，其放电比容量仍高达189 mA·h·g-1，容量保持率为67%，明显优于未掺杂样品（60.6%）。EIS和CV研究显示，当掺杂量为0.49%时，VO2（B（电荷转移电阻和电化学反应极化明显降低，此进一步诠释了其优异的电化学性能。

Abstract

Cr-doped VO2(B) has been successfully prepared via the hydrothermal method by adding appropriate amount of Cr(NO3)3·9H2O in the process of synthesis. Combined with some characterization methods such as XRD

XPS

FESEM

EDS

FTIR and so on

the influence of different doping amounts on the phase

morphology

and the electrochemical performance of the Cr-doped VO2(B) sample were investigated. The constant current charge-discharge test result shows that doping appropriate amount of Cr3+ can improve the cycling stability and charge-discharge capacity. When the doping amount was 0.49% and the current density was 0.1C

the initial discharge capacity of the sample was up to 282 mA·h·g-1

about 36 mA·h·g-1 more than that of the sample with no doping

and still more than 189 mA·h·g-1 after 50 cycles

the capacity retention was 67%

better than that of the undoped sample (60.6%) significantly. The results of electrochemical impedance spectra (EIS) and cyclic voltammetry (CV) tests showed that the charge transfer impedance resistance and electrochemical polarization of the sample which doping amount was 0.49% decreased greatly

which further demonstrated its excellent electrochemical properties.

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Synthesis and electrochemical properties of Cr-doped VO2(B) cathode materials

DOI：10.11949/j.issn.0438-1157.20161263

摘要

Abstract

关键词

Keywords

references

Synthesis and electrochemical properties of Cr-doped VO₂(B) cathode materials