Gram-Scale Synthesis of Nanosized Li3HoBr6 Solid Electrolyte for All-Solid-State Li-Se Battery

Xiaomeng Shi, Zhichao Zeng, Hongtu Zhang, Bolong Huang, Mingzi Sun, Hon Ho Wong, Qiuyang Lu, Wei Luo, Yunhui Huang, Yaping Du, Chun Hua Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Rare earth (RE) based halide solid electrolytes (HEs) are recently considered as research hotspots in the field of all-solid-state batteries (ASSBs). The RE-based HEs possess high ionic conductivity, credible deformability, and good stability, which can bring excellent electrochemical performances for ASSBs. However, the conventional synthetic methods of RE HEs are a mechanochemical process and co-melting strategy, both approaches require expensive raw materials and sophisticated equipment. Therefore, a lot of research work is required to promote the preparation methods for these promising SSEs in ASSBs. Thus, a vacuum evaporation-assisted synthesis method is developed for the massive synthesis of HEs. The as-prepared Li3HoBr6 (LHB) has a high lithium-ion conductivity close to the mS cm−1 level and the LHB-based Li-Se ASSBs can be assembled by cold pressing. Theoretical calculations have revealed that the Li migrations are highly preferred in Li3HoBr6 owing to the low energy cost and high tolerance of stable structure. The tetrahedral and octahedral pathways are responsible for Li migrations in short and long ranges, respectively. The results show that the LHB-based Li-Se battery has good stability and rate performance, indicating that LHB has potential application in the field of ASSBs.

Original languageEnglish
Article number2101002
JournalSmall Methods
Volume5
Issue number11
DOIs
Publication statusPublished - 15 Nov 2021

Keywords

  • all-solid-state batteries
  • gram-scale synthesis
  • Li-Se batteries
  • rare earth based halides
  • vacuum evaporation-assisted method

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science

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