Results
Title

Asymmetric capacitors based on TiO and mesoporous MnO electrodes using neutral aqueous electrolyte.

Authors

Gu, Jianmin; Jin, Cuihong; Bian, Zhenpan; Liu, Xin; Li, Siheng; Tang, Shoufeng; Yuan, Deling

Abstract

Asymmetric capacitor based on TiO with the size range from 90 to 410 nm and mesoporous MnO (ca. 200-380 nm) electrodes has been successfully constructed and characterized in LiClO aqueous electrolyte. The samples of both metal oxides were fully characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), N adsorption-desorption, and so on. The electrochemical capacitive performances of both electrode materials were evaluated by cyclic voltammetry and galvanostatic charge-discharge in 1 mol/L LiClO with a working voltage of 2.0 V. The discharge profile of the asymmetric capacitor exhibited an excellent capacitive behavior and good cycling stability after 2000 cycles. Moreover, the TiO//MnO asymmetric capacitor possesses both higher energy density and power density (7.7 Wh/kg, 762.5 W/kg) than that of Maxsorb//Maxsorb symmetrical capacitor (7.0 Wh/kg, 400.0 W/kg).

Subjects

TITANIUM dioxide; CAPACITORS; MANGANESE oxides; ELECTRODES; AQUEOUS electrolytes

Publication

Journal of Nanoparticle Research, 2017, Vol 19, Issue 9, p1

ISSN

1388-0764

Publication type

Academic Journal

DOI

10.1007/s11051-017-4015-3