还原剂浓度对纳米VO<sub>2</sub>(B)微结构及其电化学性能的影响

刘德伟; 杨鹏; 徐明升; 彭科; 代海洋; 李涛; 薛人中; 陈靖; 赵承周

doi:10.12187/2020.03.004

还原剂浓度对纳米VO₂(B)微结构及其电化学性能的影响

郑州轻工业大学物理与电子工程学院, 河南郑州 450001

作者简介: 刘德伟(1979-),男,河南省濮阳市人,郑州轻工业大学副教授,博士,主要研究方向为新能源材料与器件.;

基金项目: 国家自然科学基金项目（11405148，11775192，11975211）；河南省教育厅项目（16A140022，14B140015）
中图分类号: TM912

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO₂(B)

College of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
Received Date: 2019-08-19

CLC number: TM912

摘要: 以V₂O₅为原料、草酸为还原剂，采用水热法制备不同草酸浓度下的系列纳米VO₂（B）样品（c（H₂C₂O₄）/c（V₂O₅）=x，1.00≤x≤2.50），对所制备样品的物相结构、微观形貌和电化学性能进行表征和分析.结果表明：所制备的样品均为单斜结构的纯相VO₂（B）；随着还原剂浓度的增大，VO₂（B）样品的形貌逐渐由较小的纳米片变成较长的纳米棒；VO₂（B）样品的结构缺陷主要为微孔；所得VO₂（B）样品均具有较好的可逆性和循环稳定性，其中，当x=1.75时，VO₂（B）样品具有较小的氧化还原峰电位差（0.111 V）和较小的电阻（0.770 Ω），且当电流密度为30 mA/g时，具有最大的比电容值（105.00 F/g），表现出更好的电化学性能.
- 纳米VO₂(B) /
- 微观形貌 /
- 结构缺陷 /
- 电化学性能
Abstract: Using V₂O₅ as raw material, oxalic acid as reducing agent, a series of nano-VO₂ (B) samples with different oxalic acid concentrations (c(H₂C₂O₄)/c(V₂O₅)=x,1.00≤x≤2.50) were prepared by hydrothermal method. The structure, micro-morphology and electrochemical performance of the prepared samples were characterized and analyzed. The results showed that the prepared samples were all pure phase VO₂ (B) with monoclinic structure; with the increase of the concentration of reducing agent, the morphology of the VO₂ (B) sample gradually changed from smaller nanoplates to larger nanorods; the structural defects of VO₂ (B) samples were mainly micropores; the obtained VO₂ (B) samples all had good cycle stability and reversibility. Among them, the VO₂ (B) sample obtained with x=1.75 had smaller redox peak potential difference (0.111 V) and smaller resistance (0.770 Ω), and when the current density was 30 mA/g, the VO₂ (B) sample had the largest specific capacitance value, 105.00 F/g, showing better electrochemical performance.
- Nano-VO₂(B) /
- micromorphology /
- structural defect /
- electrochemical property
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沈阳化工大学材料科学与工程学院沈阳 110142

还原剂浓度对纳米VO₂(B)微结构及其电化学性能的影响

作者简介: 刘德伟(1979-),男,河南省濮阳市人,郑州轻工业大学副教授,博士,主要研究方向为新能源材料与器件.;

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO₂(B)

计量

通讯作者: 陈斌, bchen63@163.com

还原剂浓度对纳米VO₂(B)微结构及其电化学性能的影响

作者简介:刘德伟(1979-),男,河南省濮阳市人,郑州轻工业大学副教授,博士,主要研究方向为新能源材料与器件.

English Abstract

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO₂(B)

目录

还原剂浓度对纳米VO2(B)微结构及其电化学性能的影响

作者简介: 刘德伟(1979-),男,河南省濮阳市人,郑州轻工业大学副教授,博士,主要研究方向为新能源材料与器件.;

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO2(B)

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通讯作者: 陈斌, bchen63@163.com

还原剂浓度对纳米VO2(B)微结构及其电化学性能的影响

作者简介:刘德伟(1979-),男,河南省濮阳市人,郑州轻工业大学副教授,博士,主要研究方向为新能源材料与器件.

English Abstract

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO2(B)

目录

还原剂浓度对纳米VO₂(B)微结构及其电化学性能的影响

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO₂(B)

还原剂浓度对纳米VO₂(B)微结构及其电化学性能的影响

Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO₂(B)