title: High Rate Performance Nanocomposite Electrode of Mesoporous Manganese Dioxide/Silver Nanowires in KI Electrolytes.
abstract: In recent years, manganese dioxide has become a research hotspot as an electrode material because of its low price. However, it has also become an obstacle to industrialization due to its low ratio of capacitance and the low rate performance which is caused by the poor electrical conductivity. In this study, a KI solution with electrochemical activity was innovatively applied to the electrolyte, and we systematically investigated the rate performance of the mesoporous manganese dioxide and the composite electrode with silver nanowires in supercapacitors. The results showed that when mesoporous manganese dioxide and mesoporous manganese dioxide/silver nanowires composite were used as electrodes, the strength of the current was amplified five times (from 0.1 to 0.5 A/g), the remaining rates of specific capacitance were 95% (from 205.5 down to 197.1 F/g) and 92% (from 208.1 down to 191.7 F/g) in the KI electrolyte, and the rate performance was much higher than which in an Na₂SO₄ electrolyte with a remaining rate of 25% (from 200.3 down to 49.1 F/g) and 60% (from 187.2 down to 113.1 F/g). The morphology and detail structure were investigated by Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectrometry and Nitrogen adsorption-desorption isotherms. The electrochemical performance was assessed by cyclic voltammograms, galvanostatic charge/discharge and electrochemical impedance spectroscopy.
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. jiangyanhua@bipt.edu.cn.
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. cuixiuguo@bipt.edu.cn.
authors.forename: Xiuguo
authors.initials: X
authors.lastname: Cui
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. zulei@buct.edu.cn.|State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. zulei@buct.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Zu
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. huzhongkai@bipt.edu.cn.|State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. huzhongkai@bipt.edu.cn.
authors.forename: Zhongkai
authors.initials: Z
authors.lastname: Hu
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. ganjing@bipt.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Gan
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. lianhuiqin@bipt.edu.cn.|Beijing Key Laboratory of Specialty Elastomer Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China. lianhuiqin@bipt.edu.cn.
authors.forename: Huiqin
authors.initials: H
authors.lastname: Lian
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. yang.liu@bipt.edu.cn.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China. xingguangjian@bipt.edu.cn.
authors.forename: Guangjian
authors.initials: G
authors.lastname: Xing
keywords: electrolyte; mesoporous manganese dioxide; silver nanowires; specific capacitance