"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Synthesis of SnO 2 /RGO nanocomposite and its superior capacitive performance as supercapacitor electrode materials

WEIDONG CHEN1, ZHONGAI HU2, YANLI CHEN1,*

Affiliation

  1. Gansu Vocation Technical College of Nonferrous Metallurgy, Jinchang 737100, Gansu, China
  2. Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest N

Abstract

SnO2 nanoparticles supported by reduced graphene oxide (SnO2/RGO composites) have been fabricated through a simple chemical route in a water system. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) observation of the composite with mass ratio of 76.1:23.9 (SnO 2 RGO) reveals that SnO 2 nanoparticles (about 4 8 nm in size) locate on RGO sheets homogeneously. Interestingly, the morphology features of RGO in composites are influenced by the number of loaded SnO2 nanoparticles. In the composite, SnO2 act as spacers to prevent effectively the agglomeration of RGO sheets while the RGO sheets in good dispersion server as a conductor for fast electron transfer between the active materials and charge collector, as well as buffered spaces to a ccommodate the volume expansion/contraction during discharge/charge process. The composite, as electrode materials in supercapacitors, exhibited a specific capacitance as high as 326 F/g at the specific current of 1 A/g in 1M H2SO4 electrolyte in the potential window from 0 to 1.0 V. Furthermore, the composite was testified to have rather excellent cycle life along with about 97.2% specific capacitance retained after 1000 cycle tests. These results indicate that the electrochemical capacitive performance of as-prepared nanocomposites could be enhanced by the positive synergistic effect between RGO and SnO2..

Keywords

Tin oxide, Reduced graphene oxide, Composites, Enhanced electrochemical capacitance.

Citation

WEIDONG CHEN, ZHONGAI HU, YANLI CHEN, Synthesis of SnO 2 /RGO nanocomposite and its superior capacitive performance as supercapacitor electrode materials, Optoelectronics and Advanced Materials - Rapid Communications, 12, 3-4, March-April 2018, pp.211-221 (2018).

Submitted at: March 4, 2017

Accepted at: April 5, 2018