Vanadium oxides–reduced graphene oxide composite for lithium-ion batteries and supercapacitors with improved electrochemical performance

• Published in: Journal of power sources Vol. 222; pp. 21 - 31
• Main Authors: Zhao, Hongbin, Pan, Lanying, Xing, Siyi, Luo, Jun, Xu, Jiaqiang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.01.2013; Elsevier
• Subjects: Applied sciences; Capacitors; Capacitors. Resistors. Filters; Cathode; Cathodes; Cycles; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Graphene; Lithium batteries; Lithium-ion batteries; Materials; Oxides; Performance enhancement; Rechargeable battery; Reduced graphene oxide; Supercapacitor; Transport and storage of energy; Vanadium oxides; Various equipment and components; Supercapacitor; Vanadium oxides; Reduced graphene oxide; Rechargeable battery; Cathode; Performance evaluation; Nanostructured material; Alkaline storage battery; Electrode material; Coatings; Composite material; Smart materials; Electrochemical characteristic; Spectrometry; Vanadium oxide; Cycling; Storage system; Secondary cell; Electric contact; Electrolytic capacitor; Lithium battery; Graphene; Energy transfer; Specific capacity; Energy storage
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2012.08.036

A facile approach to the surface reduced graphene oxide (rGO) modification of micro-nano structured vanadium oxides composites are developed as cathode materials of lithium ions batteries (LIBs) and supercapacitors (SCPs) for the first time. The as-prepared V2O5–rGO and VO2–rGO composites exhibit remarkably enhanced cycling performance when being used as cathode materials in LIBs and SCPs, respectively. The uniform coating of graphene around the surface of vanadium oxides ensures good close electrical contact, therefore higher specific capacity and enhanced cycling performance than pure VO2 and V2O5 electrodes. Meanwhile, the cycling performance enhancement and capacity decay mechanism are presented, which is not only important to design electrode materials in LIBs and SCPs, but also extendable to the design and fabrication of other functional materials for energy storage and transfer systems. [Display omitted] ► Vanadium oxides–rGO were synthesized at first time by hydrothermal reduction-heat treatment. ► Enhanced stable performance for Lithium-ion batteries and supercapacitors was obtained. ► The uniform coating of graphene ensures good close electrical contact and cycling performance.