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Vanadium Pentoxide/Reduced Graphene Oxide Composite as an Efficient Electrode Material for High‐Performance Supercapacitors and Self‐Powered Systems
Author(s) -
Ramadoss Ananthakumar,
Saravanakumar Balasubramaniam,
Kim Sang Jae
Publication year - 2015
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500059
Subject(s) - pentoxide , supercapacitor , graphene , materials science , vanadium , capacitance , composite number , vanadium oxide , oxide , electrode , chemical engineering , nanotechnology , composite material , chemistry , metallurgy , engineering
In this study, we report the facile synthesis of reduced graphene oxide/vanadium pentoxide (GV) composites and the application of this material towards the supercapacitor application. The as‐fabricated reduced graphene oxide/vanadium pentoxide (GV‐3) composite electrodes displayed outstanding electrochemical performance with a maximum specific capacitance of 250 F g −1 at 5 mV s −1 and excellent cycling stability, retaining 95 % of the initial capacitance, even after 5000 cycles, which shows improved behavior compared to rGO and V 2 O 5 . Further, the synthesis process is simple, less time consuming, and requires no sophisticated instruments. In addition, we have demonstrated a self‐powered photosensor system by integrating the solid‐state symmetric GV supercapacitor device with a nanogenerator and photosensor. These results indicate that the reduced graphene oxide/vanadium pentoxide composite electrode can be useful for improved high‐performance supercapacitors.