Spinel-Type MgMn2O4Nanoplates with Vanadate Coating for a Positive Electrode of Magnesium Rechargeable Batteries

Shunsuke Doi, Ryuta Ise, Toshihiko Mandai, Yuya Oaki, Shunsuke Yagi, Hiroaki Imai

Research output: Contribution to journalArticle

Abstract

Spinel-type MgMn2O4 nanoplates ∼10 nm thick were prepared as a positive electrode for magnesium rechargeable batteries by the transformation of metal hydroxide nanoplates. Homogeneous coating with a vanadate layer thinner than 3 nm was achieved on the spinel oxide nanoplates via coverage of the precursor and subsequent mild calcination. We found that the spinel oxide nanoplates with the homogeneous coating exhibit improved electrochemical properties, such as discharge potential, capacity, and cyclability, due to the enhanced insertion and extraction of magnesium ions and suppressed decomposition of electrolytes. The nanometric platy morphology of the spinel oxide and the vanadate coating act synergistically for the improvement of the electrochemical performance.

Original languageEnglish
Pages (from-to)8537-8542
Number of pages6
JournalLangmuir
Volume36
Issue number29
DOIs
Publication statusPublished - 2020 Jul 28

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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