摘要
在过渡金属氧化物中,二氧化锰(MnO_2)是法拉第电容器的重要电极材料,因其具有易得、价廉、无毒、环境友好等优点,近年来一直是电化学储能电极材料的研究热点.以Ni网为基底,通过一步电化学沉积的方法制备了具有球形结构的MnO_2粒子,基底良好的导电性以及复合材料的3维结构使得在电化学反应时增加了电极材料与电解液的接触面积,因而使得电极的电化学性能大幅度提高:该电极在200 mA·g^(-1)的电流密度下的首次放电比电容达到146.9 F·g^(-1),且经过1 000次循环后,比电容保持率为91.1%,显示出较高的放电比容量和良好的循环性能.
In the transition metal oxides,manganese dioxide（ MnO_2） is one of the important electrode materials for the Faraday capacitors. Due to it have a lot of advantages,such as the low cost,non-toxic,environmentally friendly,and so on. In recent years,MnO_2 has been the research focus of electrochemical energy storage electrode materials.In this paper,based on Ni network,MnO_2/ Ni composite was prepared by the electrochemical deposition MnO_2 particles with spherical structure,the basal good electrical conductivity and three-dimensional structure,which can increasing the contact area of the electrode materials and electrolyte improve the electrochemical performance of the MnO_2/ Ni composite materials,the discharge specific capacitance of MnO_2/ Ni can be up to 146. 9 g · F（-1） at the current density of 200 mA·g（-1）with retention rate of 91. 1% after 1 000 charging-discharging,it shown high discharge specific capacity and good cycle performance.
出处
《江西师范大学学报（自然科学版）》
CAS
北大核心
2017年第1期85-88,共4页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
国家自然科学基金(21463013)
江西省自然科学基金(20142BAB203013)资助项目
