An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO2 hybrid composite

Beilstein Journal of Nanotechnology

Mamta Sham Lal^1¹ 

[1]Alternative Energy and Nanotechnology Laboratory (AENL), Nano Functional Materials Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India^1

关键词: composite;    electrochemical performance;    porous carbon nanofiber;    solid-state hybrid supercapacitor;    supercapacitor;    TiO2 nanoparticles;   

DOI  :  10.3762/bjnano.10.78

学科分类：地球科学(综合)

来源: Beilstein - Institut zur Foerderung der Chemischen Wissenschaften

【 摘 要 】

A Cu/CuO/porous carbon nanofiber/TiO₂ (Cu/CuO/PCNF/TiO₂) composite uniformly covered with TiO₂ nanoparticles was synthesized by electrospinning and a simple hydrothermal technique. The synthesized composite exhibits a unique morphology and excellent supercapacitive performance, including both electric double layer and pseudo-capacitance behavior. Electrochemical measurements were performed by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. The highest specific capacitance value of 530 F g⁻¹ at a current density of 1.5 A g⁻¹ was obtained for the Cu/CuO/PCNF/TiO₂ composite electrode in a three-electrode configuration. The solid-state hybrid supercapacitor (SSHSC) fabricated based on this composite exhibits a high specific capacitance value of 330 F g⁻¹ at a current density of 1 A g⁻¹ with 78.8% capacitance retention for up to 10,000 cycles. At the same time, a high energy density of 45.83 Wh kg⁻¹ at a power density of 1.27 kW kg⁻¹ was also realized. The developed electrode material provides new insight into ways to enhance the electrochemical properties of solid-state supercapacitors, based on the synergistic effect of porous carbon nanofibers, metal and metal oxide nanoparticles, which together open up new opportunities for energy storage and conversion applications.

【 授权许可】

CC BY