超级电容器
介电谱
电容
循环伏安法
纳米颗粒
材料科学
奈奎斯特图
纳米技术
双层电容
假电容
储能
分析化学(期刊)
化学工程
氧化钌
硫化钴
化学
电化学
有机化学
电极
工程类
功率(物理)
物理化学
物理
量子力学
作者
Karthikeyan Krishnamoorthy,Parthiban Pazhamalai,Sang‐Jae Kim
标识
DOI:10.1016/j.electacta.2016.12.171
摘要
Transition metal chalcogenides received much attention as high performance electrode materials for energy storage devices during this decade. In this article, we demonstrated the sonochemical preparation of cubic RuS2 nanoparticles with average size in the range of 20 nm and investigated their supercapacitive properties in detail using cyclic voltammetry, charge-discharge analysis and electrochemical impedance spectroscopy, respectively. The RuS2 electrode delivered a specific capacitance of 85 F g−1 at a constant discharge current density of 0.5 mA cm−1 using a three electrode configuration. The RuS2 symmetric supercapacitor device delivered a specific capacitance of 17 F g−1 and excellent cyclic stability of about 96.15% capacitance retention over 5000 cycles. The electrochemical impedance spectroscopy (Nyquist and Bode) analysis together with the frequency dependent capacitance (real and imaginary) studies confirmed the ideal capacitive nature of the RuS2 supercapacitor. The experimental findings ensure the potential application of RuS2 nanoparticles as a novel electrode material for electrochemical energy storage devices.
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