Fast Diffusion of Multivalent Ions Facilitated by Concerted Interactions in Dual-Ion Battery Systems

Hongyi Li, Norihiko L. Okamoto, Takuya Hatakeyama, Yu Kumagai, Fumiyasu Oba, Tetsu Ichitsubo

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Sluggish solid-phase diffusion has been an essential issue in developing intercalation electrode materials using multivalent ions. Compared to monovalent Li ions, the diffusion of multivalent ions is still not well understood. Here, combining first-principles calculations with electrochemical experiments, it is shown that the diffusion of divalent Mg ions is significantly facilitated in Li–Mg dual-ion systems, and the activation energy is remarkably reduced by the concerted interactions of the preceding Li ions and following Mg ions. Thus, making dual-ion systems is a promising way to construct high-energy-density, rechargeable batteries with multivalent ions. This work will provide a new perspective on solid-phase diffusion that is typically a rate-controlling process in battery systems and fuel cell devices.

Original languageEnglish
Article number1801475
JournalAdvanced Energy Materials
Volume8
Issue number27
DOIs
Publication statusPublished - 2018 Sep 25

Keywords

  • Li–Mg batteries
  • concerted interactions
  • dual-ion carriers
  • intercalation electrode materials
  • solid-phase diffusion

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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