钙掺杂钒青铜超级电容器电极材料的制备及其性能  

Preparation and Properties of Ca^(2+)-doped Vanadium Bronze as Electrode Material of Supercapacitor

作　　者：穆学超[1,2] 王欣然[2] 郑诗礼[2] 王少娜[2] 郭奋[1] 杜浩[2] 张懿[2] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190

出　　处：《过程工程学报》2013年第5期882-888,共7页The Chinese Journal of Process Engineering

基　　金：国家重点基础研究发展规划(973)基金资助项目(编号:2013CB632601;2013CB632605);国家自然科学基金资助项目(编号:51090382;51274179)

摘　　要：采用酸化水解沉钒工艺制备超级电容器钒青铜材料,通过循环伏安法和恒电流充放电测试,分析酸化产物在1 mol/L NaNO3溶液中的超电容性能,考察了Na3VO4浓度、掺杂阳离子种类及掺杂量等对酸化产物超电容性能的影响.结果表明,在1 A/g电流密度下,Na3VO4浓度为0.1 mol/L时钠钒青铜初始电容最优,为120 F/g.加入0.25 mol/L Ca2+,所制Ca0.59Na0.83V6O16初始电容可提高到168 F/g,循环100次后保持率为80%,电化学性能优于V2O5及钠钒青铜.掺杂一定量Ca2+可显著提高酸化产物的超电容稳定性和电容量.Vanadium bronze was prepared by traditional acidification process with sodium vanadate as precursor, and its electrochemical capacitance quantitatively measured by cyclic voltammetry and galvanostatic charge-discharge methods in 1 mol/L NaNO3 solution. The effects of the precursor concentration, doping cation species and amount of doping cation on the performance of vanadium bronze were examined. Electrochemical investigation reveals that the product contains the optimal capacitance of 120 F/g when the concentration of Na3VO4 is 0.1 mol/L. The sample doped with 0.25 mol/L Ca2＋ exhibits improved capacitance of 168 F/g in the initial circle and maintains 131 F/g capacitance after 100 circles. Its electrochemical properties are better than V2O5 and Na-doped vanadium oxide.

关 键 词：超级电容器 酸化沉钒 钒青铜 钙掺杂 

分 类 号：TQ135.11[化学工程—无机化工]