Low Interface Resistance in Solid-State Lithium Batteries Using Spinel LiNi0.5Mn1.5O4(111) Epitaxial Thin Films

Hideyuki Kawasoko, Tetsuroh Shirasawa, Susumu Shiraki, Toru Suzuki, Shigeru Kobayashi, Kazunori Nishio, Ryota Shimizu, Taro Hitosugi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Solid-state Li batteries that use spinel LiNi0.5Mn1.5O4 as a positive electrode are promising energy-storage devices for portable electronics and electric vehicles. For practical applications of such batteries, it is crucial to understand the ionic conductivity across the solid-electrolyte/electrode interfaces. Here, we demonstrate a low interface resistance of 34 ω cm2 in solid-state Li batteries using LiNi0.5Mn1.5O4(111) epitaxial thin films with atomically ordered surfaces as the positive electrode. Further, we find that the interface resistance using Li3PO4/LiNi0.5Mn1.5O4(111) is larger than that using LiNi0.5Mn1.5O4(001) epitaxial thin films. These results indicate the presence of anisotropic interface resistance when different facets of spinel LiNi0.5Mn1.5O4 are used as the positive electrode.

Original languageEnglish
Pages (from-to)1358-1363
Number of pages6
JournalACS Applied Energy Materials
Volume3
Issue number2
DOIs
Publication statusPublished - 2020 Feb 24

Keywords

  • LiNiMnO
  • X-ray CTR scattering
  • epitaxial thin film
  • interface resistance
  • solid electrolyte
  • solid-state Li batteries

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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