Chemical Vapor Deposition Synthesis and Characterization of Hollow Carbon Nanospheres with High Specific Capacitance and Excellent Cycling Stability

Abstract

Recently, hollow carbon nanospheres (HCNSs) have played an important role in cutting-edge innovations for energy conversion and storage technologies. To obtain high-performance capacitors, several characteristics must be achieved, including high surface area and high diffusion rate of the electrolyte inside the active material. We report herein the electrochemical performance of interconnected HCNSs as a high-capacitive-performance electrode material. After physical characterization, the electrochemical performance of the HCNSs was evaluated experimentally by cyclic voltammetry, galvanostatic charge-discharge (GCD) measurements, and electrochemical impedance spectroscopy. A straightforward facile technique was applied to improve the working electrodes fabricated from HCNSs as electrode material. The HCNSs exhibited excellent cycling stability during 1000 GCD cycles and reasonable capacitive behavior with specific capacitance of 306.38 F g À1 at a current density of 1 A g À1 . Also, the stability of the electrode in 3000 cycles of cyclic voltammetry testing was 81%.