Published in

Elsevier, Electrochimica Acta, (178), p. 312-320, 2015

DOI: 10.1016/j.electacta.2015.08.007

Links

Tools

Export citation

Search in Google Scholar

Vanadyl phosphate/reduced graphene oxide nanosheet hybrid material and its capacitance

This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Orange circle
Postprint: archiving restricted
Red circle
Published version: archiving forbidden
Data provided by SHERPA/RoMEO

Abstract

VOPO 4 Á2H 2 O nanosheet reassembling VOPO 4 /RGO hybrid electrode capacitance A B S T R A C T The layered structure stability of bulk vanadyl phosphate dihydrate (VOPO 4 Á2H 2 O) is investigated by using a deintercalation-intercalation reaction process involving short-range swelling, its basal spacing can be reversibility controlled and the layered structure can be maintained to above 400 C. By using delaminated vanadyl phosphate (VOPO 4) nanosheets in 2-propanol, VOPO 4 /reduced graphene oxide (RGO) hybrid electrode materials for supercapacitor with different mass ratios of VOPO 4 nanosheets to graphene oxide (GO) nanosheets have been prepared based on a nanosheet reassembling reaction between the exfoliated VOPO 4 nanosheets and GO nanosheets and followed by calcinating in a tubular furnace at 400 C for 3 h under N 2 atmosphere, and their electrochemical properties are systematically investigated by cyclic voltammetry and galvanostatic charge-discharge in 0.5 M K 2 SO 4 electrolyte. The VOPO 4 /RGO hybrid electrode with a mass ratio of VOPO 4 /RGO = 1 exhibits a high specific capacitance of 378 F g À1 at a scan rate of 5 mV s À1 with a good rate capability. This method broadens the application filed of VOPO 4 nanosheets, and also supplies promising electrode candidates for supercapacitor.