Issue 10, 2020

Synthesis of cobalt-doped V2O3 with a hierarchical yolk–shell structure for high-performance lithium-ion batteries

Abstract

Transition metal oxides as electrode materials for LIBs are constrained by tremendous volume changes, self-aggregation and poor conductivity. Therefore, it is extremely imperative and necessary to develop a new electrode material with high capacity and long-term cycles. In this paper, yolk–shell Co-V2O3-24 nanospheres assembled with nanosheets were designed and synthesized through a one-step solvothermal treatment and calcination process. The results show that the anion plays a significant role in morphology induction during the solvothermal reactions. As an anode material, Co-V2O3-24 displayed an outstanding reversible specific capacity of 986.2 mA h g−1 at 0.5 A g−1 after 630 cycles with a high capacity retention rate. Even when tested at 5 A g−1 after 2200 cycles, the specific capacity of 457.6 mA h g−1 can be retained, which indicates that Co-V2O3-24 has excellent rate performance and cycle stability. The outstanding lithium storage properties mainly benefit from the novel 3D hierarchical structure, Co doping and abundant electrochemical active sites.

Graphical abstract: Synthesis of cobalt-doped V2O3 with a hierarchical yolk–shell structure for high-performance lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
08 Nov 2019
Accepted
27 Jan 2020
First published
27 Jan 2020

CrystEngComm, 2020,22, 1705-1711

Synthesis of cobalt-doped V2O3 with a hierarchical yolk–shell structure for high-performance lithium-ion batteries

S. Zhang, L. Zhang, G. Xu, X. Zhang and A. Zhao, CrystEngComm, 2020, 22, 1705 DOI: 10.1039/C9CE01771B

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