Magnesium Ions Storage in Molybdenum Oxide Structures Examined as a Promising Cathode Material for Rechargeable Magnesium Batteries

Dedy Setiawan, Hyungjin Lee, Hyeri Bu, Doron Aurbach, Seung Tae Hong, Munseok S. Chae

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Magnesium batteries have attracted considerable attention as a promising technology for future energy storage because of their capability to undergo multiple charging reactions. However, most oxide materials utilized as hosts for magnesium batteries do not perform well at room temperature or in nonaqueous electrolytes. Herein, a host material, Na0.04MoO3·(H2O)0.49 is successfully developed through the chemical reduction of alpha-MoO3, which enables magnesium storage reaction in a 0.5 m Mg(ClO4)2/acetonitrile electrolyte at 25 °C. Electrochemical analysis reveals that the cathode material possesses a discharge capacity of 157.4 mAh g−1 at a 0.2 C rate. The Na0.04MoO3·(H2O)0.49 cathode material also exhibits a capacity retention of 93.4% after 100 cycles compared to the first cycle at a 2 C rate, with an average discharge voltage of −0.474 V versus activated carbon (≈2.16 V estimated discharge voltage vs Mg/Mg2+). The study findings demonstrate, for the first time, the potential of this material as a cathode for magnesium batteries at ambient temperatures and in nonaqueous electrolytes.

Original languageEnglish
Article number2300228
JournalSmall Structures
Volume5
Issue number1
DOIs
StatePublished - Jan 2024

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Small Structures published by Wiley-VCH GmbH.

Keywords

  • cathode materials
  • magnesium batteries
  • nonaqueous electrolytes
  • sodium molybdenum oxides

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