A laser irradiation synthesis of strongly-coupled VOx-reduced graphene oxide composites as enhanced performance supercapacitor electrodes

Zhang, Lin-Fei; Tang, Jun; Liu, Shi-Yuan; Peng, Ou-Wen; Shi, Run; Chandrashekar, Bananakere Nanjegowda; Li, Yan; Li, Xin; Li, Xiang-Nan; Xu, Bao-Min; Cheng, Chun

2017-09

10.1016/j.mtener.2017.07.004

Materials Today Energy   影响因子和分区

2468-6069

A unique technique is present to synthesize three dimensional hierarchical vanadium oxides/reduced graphene oxide composites (denoted as 3D VOx/rGO composites) by laser irradiation over the mixture of V2O5 nanobelts and GO nanosheets. Electron microscopy and X-ray photoelectron spectroscopy (XPS) examinations reveal that polydisperse V2O5/VO2 heterostructured nanoparticles form strong coupling with rGO. As a result, a specific capacitance of 252 F g(-1) is achieved for 3D VOx/rGO composites when used as supercapacitor electrodes, and the capacitance can retain 92% of the initial specific capacitance even after 10000 cycles at a current density of 100 A g(-1). The improvement of supercapacitor performance is achieved by significantly increase on specific surface area of 3D VOx/rGO composites, which favors the easy access of the electrolyte and provides large electroactive surface, and strong V-O-C bond between VOx nanoparticles and rGO, which benefits the effective charge transfer. We believe that the facile laser irradiation approach represents a major step not only for the simple and efficient fabrication of high performance electrodes but also in the practical application of laser processing to synthesize other functional hierarchical nanocomposites. (C) 2017 Elsevier Ltd. All rights reserved.

ESCI ; EI ; SCI

英语

第一 ; 通讯

Southern University of Science and Technology[Y01256208]

Materials Science

Materials Science, Multidisciplinary

WOS:000439097100024

ELSEVIER SCI LTD

20184506045011

Capacitance ; Charge transfer ; Electrodes ; Electrolytes ; Irradiation ; Nanoparticles ; Supercapacitor ; Vanadium pentoxide ; X ray photoelectron spectroscopy

Electricity: Basic Concepts and Phenomena:701.1 ; Electric Batteries and Fuel Cells:702 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Solid State Physics:933

Web of Science

Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Zhang, Lin-Fei,Tang, Jun,Liu, Shi-Yuan,et al. A laser irradiation synthesis of strongly-coupled VOx-reduced graphene oxide composites as enhanced performance supercapacitor electrodes[J]. Materials Today Energy,2017,5:222-229.

Zhang, Lin-Fei.,Tang, Jun.,Liu, Shi-Yuan.,Peng, Ou-Wen.,Shi, Run.,...&Cheng, Chun.(2017).A laser irradiation synthesis of strongly-coupled VOx-reduced graphene oxide composites as enhanced performance supercapacitor electrodes.Materials Today Energy,5,222-229.

Zhang, Lin-Fei,et al."A laser irradiation synthesis of strongly-coupled VOx-reduced graphene oxide composites as enhanced performance supercapacitor electrodes".Materials Today Energy 5(2017):222-229.