Development of complex hydride-based all-solid-state lithium ion battery applying low melting point electrolyte

Shohei Suzuki, Jun Kawaji, Koji Yoshida, Atsushi Unemoto, Shin ichi Orimo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A thermally durable all-solid-state lithium ion battery composed of a complex hydride, oxide electrolytes, and LiNi1/3Mn1/3Co1/3O2 active material is developed. This battery exhibits a discharge capacity of 56 mAh g−1, and the tenth capacity retention ratio is 29% at 150 °C owing to the large contact resistance between the electrolyte layer and the composite positive electrode layer. This large contact resistance is reduced by introducing an adhesive layer comprised of a mixture of LiBH4 and LiNH2 that is easily melted by thermal treatment and fills the voids and pores at the interface between the two layers. As a result, repeated charge-discharge cycles are successfully demonstrated at 150 °C with a high discharge capacity and discharge capacity retention ratio. The first discharge capacity is enhanced to 114 mAh g−1 and the capacity retention ratio at the tenth cycle is improved to 71%. These results demonstrate that using an adhesive layer is an effective measure to reduce the contact resistance and thereby enhance the performance of the battery.

Original languageEnglish
Pages (from-to)97-103
Number of pages7
JournalJournal of Power Sources
Volume359
DOIs
Publication statusPublished - 2017

Keywords

  • Adhesive layer
  • All-solid-state battery
  • Complex hydride
  • Lithium borohydride
  • Solid oxide electrolyte

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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