Investigation of reduced lithium titanate spinel as insertion host for rechargeable batteries

Minji Jeong, Min Jin Kim, Subin Na, Seulki Han, Eunmi Jo, Seung Ho Yu, Taeeun Yim, Si Hyoung Oh

Research output: Contribution to journalArticlepeer-review

Abstract

Rechargeable batteries based on reversible zinc electrodeposition in mildly acidic electrolytes have recently gained popularity, primarily because of their cost-benefit and high theoretical energy density achievable. However, issues associated with dendrite growth and the corrosion of zinc metal anodes still remain major technical roadblocks that must be overcome to ensure battery safety. Here we propose, for the first time, reduced lithium titanate (LTO) as a viable alternative anode that is capable of reversible ion intercalation at ∼0.20 V. vs. Zn/Zn2+. Reduced LTO was prepared via simple thermochemical reduction at a mild temperature using sodium borohydride. This led to a significant reduction in the crystallite size and a drastic enhancement in the electrical conductivity, resulting in a distinct enhancement in the zinc insertion kinetics in the aqueous electrolytes, delivering a fair discharge capacity of 100 mAh g−1. Structural and morphological studies confirmed that reduced LTO served as a zero-strain host for ionic intercalation. This study offers an interesting approach for developing novel intercalation hosts for rechargeable batteries based on abundant multivalent metal cations.

Original languageEnglish
Pages (from-to)512-518
Number of pages7
JournalKorean Journal of Chemical Engineering
Volume40
Issue number3
DOIs
Publication statusPublished - 2023 Mar

Bibliographical note

Publisher Copyright:
© 2022, The Korean Institute of Chemical Engineers.

Keywords

  • Electrical Conductivity
  • Intercalation Host
  • Lithium Titanate
  • Rechargeable Zinc Battery
  • Thermochemical Reduction

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

Fingerprint

Dive into the research topics of 'Investigation of reduced lithium titanate spinel as insertion host for rechargeable batteries'. Together they form a unique fingerprint.

Cite this