▎ 摘　　要

Nanocomposite GNR@VOS composed of V2O5 nanostrips (VOS) embedded over graphene nanoribbons (GNR) is synthesized by facile hydrothermal route and examined as supercapacitor electrode. GNR as support in mere,similar to 15 wt% plays an important role in patterning the nanocomposite growth as a template. Selective formation of VOS leads to ordered growth and at the same time channelizes the microstructural (shape/size, porosity) as well electrochemical characteristics of the nanocomposite. GNR@VOS so formed is highly accessible electrode matrix in which the underlying GNR acts as conducting support to efficiently minimize the internal resistance (iR-drop) of the electrode. The study suggests that the conductive properties of VOS can be enhanced by integration with GNR displaying increased solid-state conductivity by two orders (bare VOS: 4.2 x 10(-4) S M-1 and GNR@VOS: 1.4 x 10(-2) S m(-1)). These attributes result in high energy density for GNR@VOS as 42.09 Wh kg (-1) at power density 475 W kg (-1). The enhanced performance of GNR@VOS supercapacitor cell from low (1 Ag-1) to high current density (20 Ag-1) is attributed to the balanced ionic and electronic conduction. (C) 2017 Elsevier Ltd. All rights reserved.