电化学电容器氮化钒负极材料性能研究

doi:10.61558/2993-074X.2947

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (2): 178-183. doi: 10.61558/2993-074X.2947

电化学电容器氮化钒负极材料性能研究

高兆辉¹，张浩^2*，曹高萍²，韩敏芳¹，杨裕生^1,2

1. 中国矿业大学（北京）化学与环境工程学院，北京 100083；2. 中国人民解放军防化研究院，北京 100191

收稿日期:2012-03-12 修回日期:2012-04-19 出版日期:2013-04-28 发布日期:2012-04-29
通讯作者: 张浩 E-mail:dr.h.zhang@hotmail.com
基金资助:
国家自然科学基金项目(No.50902149)资助

Performance of VN as Negative Electrode Materials in Electrochemical Capacitors

GAO Zhao-hui¹，ZHANG Hao^2*，CAO Gao-ping²，HAN Min-fang¹，YANG Yu-sheng^1,2

1. College of Chemical and Environmental Engineering，China University of Mining and Technology，Beijing 100083，China; 2. Research Institute of Chemical Defense，Beijing 100191，China

Received:2012-03-12 Revised:2012-04-19 Published:2013-04-28 Online:2012-04-29
Contact: ZHANG Hao E-mail:dr.h.zhang@hotmail.com

摘要/Abstract

摘要： 利用高温氨解还原氧化钒（V₂O₅）制备了氮化钒（VN）纳米材料. 采用XRD、SEM与TEM观察分析样品的结构和形貌，采用氮气吸附、循环伏安曲线以及恒流充放电曲线测试样品的比表面积、孔径分布和电极电化学性能. 结果表明，VN样品属于立方晶系（Fm3m [225]），其大小均一，近似球形，氨解时间的加长（12 h），小颗粒间相互交联可形成一定的介孔. 50 mA?g-1电流密度下VN-c电极的比电容能达到192 F.g-¹，1000周期循环其比电容仍有150 F.g^-1，同时具有双电层电容性能和氧化还原反应的准电容性能.

关键词: 电化学电容器, 氮化钒纳米晶, 负极材料, 比表面积, 比电容

Abstract: Nanocrystalline vanadium nitride (VN) materials were synthesized by high temperature ammonia (NH₃) reduction of vanadium oxide (V₂O₅). The structure and morphology of VN materials were characterized by XRD，SEM and TEM, while the specific surface area, pore size distribution and supercapacitive behavior by N2 absorption, cyclic voltammetry (CV) and constant current charge-discharge measurements in 1 mol?L-1 KOH electrolyte. The results showed that the VN sample belonged to the cubic crystal system (Fm3m [225])，and had homogeneous surface and appeared nearly spherical with uniform size. As the reaction time was extended to 12 h，small particles were interconnected with each other to form some mesopores. The specific capacitance of VN-c was 192 F.g^-1 at current density of 50 mA.g^-1，and retained 150 F.g^-1 after 1000 cycles. The VN sample possessed both capacitive properties of electrical double-layer and pseudocapacitive properties of redox reactions.

Key words: electrochemical capacitor, nanocrystalline vanadium nitride, negative electrode materials, specific surface area, specific capacitance

中图分类号:

O646
TM911

高兆辉, 张浩, 曹高萍, 韩敏芳, 杨裕生. 电化学电容器氮化钒负极材料性能研究[J]. 电化学（中英文）, 2013, 19(2): 178-183.

GAO Zhao-hui, ZHANG Hao, CAO Gao-ping, HAN Min-fang, YANG Yu-sheng. Performance of VN as Negative Electrode Materials in Electrochemical Capacitors[J]. Journal of Electrochemistry, 2013, 19(2): 178-183.

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https://electrochem.xmu.edu.cn/CN/Y2013/V19/I2/178

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电化学电容器氮化钒负极材料性能研究

Performance of VN as Negative Electrode Materials in Electrochemical Capacitors

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