球形多孔氮化钒的制备及其电化学性能

doi:10.11901/1005.3093.2017.710

材料研究学报

2018, Vol. 32

Issue (11): 867-873 DOI: 10.11901/1005.3093.2017.710

本期目录 | 过刊浏览

球形多孔氮化钒的制备及其电化学性能

高兆辉(

), 迟建卫, 唐茂勇, 汪彦军, 徐建萍

大连海洋大学理学院大连 116023

Synthesis and Electrochemical Performance of Spherical Porous Vanadium Nitride

Zhaohui GAO(

), Jianwei CHI, Maoyong TANG, Yanjun WANG, Jianping XU

School of Science, Dalian Ocean University, Dalian 116023, China

引用本文:

高兆辉, 迟建卫, 唐茂勇, 汪彦军, 徐建萍. 球形多孔氮化钒的制备及其电化学性能[J]. 材料研究学报, 2018, 32(11): 867-873.
Zhaohui GAO, Jianwei CHI, Maoyong TANG, Yanjun WANG, Jianping XU. Synthesis and Electrochemical Performance of Spherical Porous Vanadium Nitride[J]. Chinese Journal of Materials Research, 2018, 32(11): 867-873.

全文: PDF(1871 KB) HTML

摘要:

以CTAB为模板剂采用喷雾干燥法制备球形多孔V₂O₅前驱体,再进行氨气还原氮化处理制备出球形多孔VN材料。使用X射线衍射、扫描电子显微镜、透射电子显微镜和N₂吸附-脱附等手段表征其结构并进行了循环伏安和恒流充放电测试,研究了材料的电化学性能。结果表明,这种材料为立方晶系晶体结构,呈球形颗粒状,有丰富的介孔,比表面积为120 m²·g^-1。循环伏安测试结果表明,球形多孔VN电极同时具有双电层电容特性和赝电容特性,电流密度为100 mA·g^-1时其比电容约为513 F·g^-1,进行5000次充放电循环后其比电容保持率为76.8%,功率密度为590 W·kg^-1时能量密度为65.0 W·h·kg^-1,而功率密度为3260 W·kg^-1时能量密度为24.17 W·h·kg^-1。

关键词 ：无机非金属材料, 超级电容器, 电化学, 球形多孔VN

Abstract：

Spherical porous VN materials were synthesized by a facile NH₃ reduction method with spherical V₂O₅ as the precursor,while the spherical V₂O₅ was prepared via soft template method and spray drying technology. The structure, morphology and electrochemical performance of the prepared VN were characterized by means of XRD,SEM,TEM,and N₂ adsorption-desorption analysis, as well as cyclic voltammetry and galvanostatic charge-discharge measurements. The results show that the synthesized spherical porous VN powder presents cubic crystallographic structure with abundant mesopores,and its specific surface area is 120 m²·g^-1. In addition, the spherical porous VN powder presents characteristics both in electrical double-layer capacitance and redox pseudo-capacitance . Its specific capacitance is 513 F·g^-1 by current density of 100 mA·g^-1,and which remained 76.8% even after 5000 cycles. For power density is 590 W·kg^-1,its energy density is 65.0 W·h·kg^-1. When the power density was 3260 W·kg^-1,the energy density was as high as 24.17 W·h·kg^-1.

Key words： inorganic non-metallic materials supercapacitors electrochemistry spherical porous VN

收稿日期: 2017-12-01

ZTFLH:

O646

基金资助:中央财政支持地方高校发展专项资金(500217201010)和辽宁省自然科学基金指导计划项目(20170540109)

作者简介:

作者简介高兆辉,男,1980年生,博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.710 或 https://www.cjmr.org/CN/Y2018/V32/I11/867

图1 V2O5前驱体和球形多孔VN的X射线衍射图谱

图2 V2O5前驱体和球形多孔VN的SEM照片、球形多孔VN的TEM照片以及EDS谱图

图3 V2O5前驱体和球形多孔VN的N2等温吸附曲线和孔径分布曲线

图4 球形多孔VN在不同扫描速率条件下的循环伏安曲线、在不同电流密度条件下的恒流充放电曲线、在不同扫描速率条件下的比电容曲线、循环寿命曲线、交流阻抗曲线、能量密度和功率密度曲线

图5 球形多孔VN的XPS谱图

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