TY - JOUR
T1 - Solvothermal synthesis of V2O5/graphene nanocomposites for high performance lithium ion batteries
AU - Chen, Da
AU - Yi, Ran
AU - Chen, Shuru
AU - Xu, Terrence
AU - Gordin, Mikhail L.
AU - Lv, Dongping
AU - Wang, Donghai
N1 - Funding Information:
This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, Subcontract No. 6951378 under the Batteries for Advanced Transportation Technologies (BATT) Program.
PY - 2014/7
Y1 - 2014/7
N2 - In this work, V2O5/graphene nanocomposites have been synthesized by a facile solvothermal approach. The V2O5 nanoparticles, around 20-40 nm in size, were encapsulated in the 2D graphene matrix. The reversible Li-cycling properties of V2O 5/graphene have been evaluated by galvanostatic discharge-charge cycling, cyclic voltammetry, and impedance spectroscopy. Compared with the bare V2O5 nanoparticles, the V2O5/ graphene nanocomposites exhibited enhanced electrochemical performance with higher reversible capacity and improved cycling stability and rate capability. The graphene nanosheets act not only as an electronically conductive matrix to improve the electronic and ionic conductivity of the composite electrode, but also as a flexible buffer matrix to maintain the structural integrity of the composite electrodes by preventing particle agglomeration, thus leading to the improvement of the electrochemical performance of V2O5.
AB - In this work, V2O5/graphene nanocomposites have been synthesized by a facile solvothermal approach. The V2O5 nanoparticles, around 20-40 nm in size, were encapsulated in the 2D graphene matrix. The reversible Li-cycling properties of V2O 5/graphene have been evaluated by galvanostatic discharge-charge cycling, cyclic voltammetry, and impedance spectroscopy. Compared with the bare V2O5 nanoparticles, the V2O5/ graphene nanocomposites exhibited enhanced electrochemical performance with higher reversible capacity and improved cycling stability and rate capability. The graphene nanosheets act not only as an electronically conductive matrix to improve the electronic and ionic conductivity of the composite electrode, but also as a flexible buffer matrix to maintain the structural integrity of the composite electrodes by preventing particle agglomeration, thus leading to the improvement of the electrochemical performance of V2O5.
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U2 - 10.1016/j.mseb.2014.01.015
DO - 10.1016/j.mseb.2014.01.015
M3 - Article
AN - SCOPUS:84897693596
SN - 0921-5107
VL - 185
SP - 7
EP - 12
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
IS - 1
ER -
