Synthesis of the Metastable Cubic Phase of Li2OHCl by a Mechanochemical Method

Takayuki Yamamoto, Hinata Shiba, Naohiro Mitsukuchi, Manoj Krishna Sugumar, Munekazu Motoyama, Yasutoshi Iriyama

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The oxyhalide-based solid electrolyte Li2OHCl usually forms the thermodynamically stable orthorhombic phase at room temperature and shows poor lithium ionic conductivity. Above 35 °C, a structural phase transition into the cubic phase occurs and ionic conductivity is enhanced. In this work, mechanochemical synthesis of Li2OHCl is reported. The as-prepared Li2OHCl formed a cubic Pm3¯ m structure and showed an ionic conductivity of 2.6 × 10-6 S cm-1 at 25 °C. Once the cubic phase was treated at 200 °C, the orthorhombic Pmc21 structure appeared at 25 °C and the ionic conductivity decreased down to 1.4 × 10-7 S cm-1. Formation of the metastable cubic phase could be explained in terms of low crystallinity of Li2OHCl derived from mechanochemical synthesis.

Original languageEnglish
Pages (from-to)11901-11904
Number of pages4
JournalInorganic chemistry
Volume59
Issue number17
DOIs
Publication statusPublished - Sep 8 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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