Enhanced electrochemical performance of a selectively formed V2O3/C composite structure for Li-ion batteries

Abstract

The electrochemical performance of V2O3 as an anode in lithium-ion batteries (LIBs) is quite good but it is very difficult to compete with Si/C composites. Because its intrinsic electrical conductivity and volumetric expansion during charging/discharging limit its applications as an anode in LIBs. In this study, micro spherical V2O3 anode samples were prepared using a facile synthesis procedure such as the solvothermal method and heating process. Furthermore, a composite sample comprising V2O3 and carbon (V2O3/C) could be selectively prepared in the absence of ethanol washing and centrifugation. In particular, compared to a commercial V2O3 and V2O3, the V2O3/C anode exhibited enhanced electrochemical performance, i.e., rate performance (230 mAh g(-1) at 1.0 A g(-1), 180 mAh g(-1) at 2.0 A g(-1)), cycling properties (508 mAh g(-1) at 0.1 A g(-1) for 100 cycles), and high retention (similar to 10 0%). (C) 2021 Elsevier Ltd. All rights reserved.