摘要
采用电沉积法制备超级电容器用钽基(RuO_2/MnO_2)·n H_2O复合薄膜电极材料,制定钽箔基体的预处理方法、复合溶液主盐的配置比例、电沉积参数和热处理参数。重点研究了初始沉积液中Mn^(7+)与Ru^(3+)摩尔浓度比以及不同热处理参数对((RuO_2/MnO_2)·n H_2O复合薄膜附着力与电学性能的影响。借助扫描电镜、X射线衍射仪对薄膜的形貌和物相分析,用电化学工作站对该复合薄膜电化学性能进行测量。实验结果表明,当初始沉积液中Mn^(7+)与Ru^(3+)摩尔比为3:1,热处理温度为250℃,时间为2.5h,所制备出的复合电极薄膜具有较好的附着力和较高的比电容,分别为14.8MPa与418F/g。该复合薄膜在不同扫描速率下的循环伏安图具有高度可逆的氧化和还原曲线,说明其具有很明显的电容特性,是一种较为理想的RuO_2基复合薄膜。
The（RuO_2/MnO_2）·n H_2O film on tantalum substrate used in supercapacitor was prepared by electrodepositon,and the method of tantalum foil substrate pre-treatment,the proportion of the composite solution,the electro-deposition parameters and heat treatment method were developed.The effect of the molar concentration ratio of Mn^（7＋） and Ru^（3＋） in the initial electrodepositon solution and the heat-treatment method on the adhesion and capacitance of（RuO_2/MnO_2）·n H_2O composite films was researched.The morphology and phase of the composite films were analyzed by scanning electron microscopy and X-ray diffractometer.The electrochemical performance of the composite films was characterized by cyclic voltammetry.The experimental results show that when the molar concentration ratio of Mn^（7＋） and Ru^（3＋） in the initial electrodepositon solution is 3：1 and the films are annealed at 250 ℃ for 2.5 h,the adhesion and capacitance of the composite films are respectively 14.8 MPa and 418 F/g.The cyclic voltammetry of the composite films at different scan rates shows highly reversible oxidation and reduction curves,which illustrates its excellent capacitance characteristics.
出处
《电源技术》
CAS
CSCD
北大核心
2010年第7期654-657,共4页
Chinese Journal of Power Sources
基金
国家高技术研究发展计划"863"项目资助(2007AA03Z240)
作者简介
甘卫平（1955-）。男。湖南省人。教授．主要研究方向为电子及信息功能材料。
联系人：马贺然，E-mail：，0731--88830248
