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작성일 : 17-02-23 13:14
Ruthenium sulfide nanoparticles supercapacitor_Electrochimica Acta
 글쓴이 : supervisor
조회 : 1,059  
   2017_Karthi_RuS2_Electrochima_Acta.pdf (3.4M) [6] DATE : 2017-02-23 13:14:08
Ruthenium sulfide nanoparticles as a new pseudocapacitive material for supercapacitor
Karthikeyan Krishnamoorthya, Parthiban Pazhamalaia, Sang Jae Kima,b,*

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 g1 at a constant
discharge current density of 0.5 mA cm1 using a three electrode configuration. The RuS2 symmetric
supercapacitor device delivered a specific capacitance of 17 F g1 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.