Bottom-current-collector-free thin-film batteries using LiNi0.8Co0.2O2 epitaxial thin films

Kazunori Nishio, Koji Horiba, Naoto Nakamura, Miho Kitamura, Hiroshi Kumigashira, Ryota Shimizu, Taro Hitosugi

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The decrease in the resistance at solid electrolyte and electrode interfaces has become a critical issue in the development of solid-state lithium batteries. To understand the ionic transport properties across solid electrolyte and electrode interfaces, thin-film batteries consisting of flat epitaxial films are of considerable importance. Herein, we report the operation of bottom-current-collector-free thin-film batteries using LiNi0.8Co0.2O2 epitaxial thin films. As the bottom current collector is not inserted between the substrates and LiNi0.8Co0.2O2, the surface of LiNi0.8Co0.2O2 is very flat, with a surface roughness average of approximately 0.44 nm. This study proposes a very flat electrode surface suitable for the investigation of interfacial phenomena at solid electrolyte and electrode interfaces.

Original languageEnglish
Pages (from-to)56-61
Number of pages6
JournalJournal of Power Sources
Publication statusPublished - 2019 Mar 15


  • Epitaxial thin film
  • Interface resistance
  • LiNiCoO
  • Pulsed laser deposition
  • Solid-state battery

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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