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

May 2020

Article Contents

LIU Dewei, YANG Peng, XU Mingsheng, et al. Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO2(B)[J]. Journal of Light Industry, 2020, 35(3): 28-36. doi: 10.12187/2020.03.004

Citation: LIU Dewei, YANG Peng, XU Mingsheng, et al. Effect of reducing agent concentration on microstructure and electrochemical properties of Nano-VO2(B)[J]. Journal of Light Industry, 2020, 35(3): 28-36. doi: 10.12187/2020.03.004 shu

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

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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