An Artificial Interphase Enables Reversible Magnesium Chemistry in Carbonate Electrolytes

Seoung Bum Son, Tao Gao, Steve P. Harvey, K. Xerxes Steirer, Adam Stokes, Andrew Norman, Chunsheng Wang, Arthur Cresce, Kang Xu, Chunmei Ban

Research output: Contribution to journalArticlepeer-review

336 Scopus Citations

Abstract

Magnesium-based batteries possess potential advantages over their lithium counterparts. However, reversible Mg chemistry requires a thermodynamically stable electrolyte at low potential, which is usually achieved with corrosive components and at the expense of stability against oxidation. In lithium-ion batteries the conflict between the cathodic and anodic stabilities of the electrolytes is resolved by forming an anode interphase that shields the electrolyte from being reduced. This strategy cannot be applied to Mg batteries because divalent Mg2+ cannot penetrate such interphases. Here, we engineer an artificial Mg2+-conductive interphase on the Mg anode surface, which successfully decouples the anodic and cathodic requirements for electrolytes and demonstrate highly reversible Mg chemistry in oxidation-resistant electrolytes. The artificial interphase enables the reversible cycling of a Mg/V2O5 full-cell in the water-containing, carbonate-based electrolyte. This approach provides a new avenue not only for Mg but also for other multivalent-cation batteries facing the same problems, taking a step towards their use in energy-storage applications.

Original languageAmerican English
Pages (from-to)532-539
Number of pages8
JournalNature Chemistry
Volume10
Issue number5
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 The Author(s).

NREL Publication Number

  • NREL/JA-5900-66801

Keywords

  • energy storage
  • Mg-ion battery
  • surface modification

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