Facile synthesis of hydrated magnesium vanadium bronze σ-Mg0.25V2O5·H2O as a novel cathode material for lithium-ion batteries

Yining Ma, Huaijuan Zhou, Rong Li, Aibin Huang, Xun Cao*, Heliang Yao, Shanhu Bao, Shidong Ji, Ping Jin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Square block-like σ-Mg0.25V2O5·H2O with an open layered framework has been successfully synthesized via a facile hydrothermal method. The entire synthetic process is efficient and economically beneficial. As a cathode material for lithium-ion batteries, the hydrated magnesium vanadium bronze exhibits a high reversible capacity and excellent cycling stability at high current rates. High discharge capacities of 294.2 and 221 mA h g−1 can be obtained at the current densities of 20 and 100 mA g−1, respectively. Meanwhile, the electrode achieves a capacity retention of 87.12% after 100 cycles at 100 mA g−1 and has an excellent long-term cyclic stability with an average decay of 0.053% per cycle over 400 cycles at 800 mA g−1. The structural stability and impedance variation of the σ-Mg0.25V2O5·H2O electrodes upon cycling have also been investigated. The excellent electrochemical performance suggests that the layered Mg0.25V2O5·H2O could be a promising candidate for the cathode material of lithium-ion batteries.

Original languageEnglish
Pages (from-to)931-938
Number of pages8
JournalJournal of Alloys and Compounds
Volume777
DOIs
Publication statusPublished - 10 Mar 2019
Externally publishedYes

Keywords

  • Cathode material
  • Lithium-ion batteries
  • Long-term cyclic stability
  • Vanadium bronze
  • σ-MgVO·HO

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