Synthesis, structure and electrochemical properties of novel Li-Co-Mn-O epitaxial thin-film electrode using layer-by-layer deposition process

Jaemin Lim, Soyeon Lee, Kota Suzuki, Kyungsu Kim, Sangryun Kim, Sou Taminato, Masaaki Hirayama, Yoshifumi Oshima, Kunio Takayanagi, Ryoji Kanno

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A novel epitaxial thin-film electrode for lithium batteries, with a composition of Li0.92Co0.65Mn1.35O4 and a cubic spinel structure, is fabricated on a SrTiO3(111) single-crystal substrate. Fabrication is carried out by layer-by-layer pulsed laser deposition of LiCoO2 with a layered rock-salt structure and LiMn2O4 with a spinel structure. The electrode is found to exhibit unique disordering of the lithium (8a) and transition-metal (16d) sites, leading to a higher rate capability and cycle retention ratio than those for a thin-film electrode with the same composition prepared by a conventional single-step deposition process. The proposed layer-by-layer deposition method allows an expanded range of compositional and structural variations for lithium battery electrode materials.

Original languageEnglish
Pages (from-to)502-509
Number of pages8
JournalJournal of Power Sources
Volume279
DOIs
Publication statusPublished - 2015 Apr 1
Externally publishedYes

Keywords

  • Epitaxial thin film
  • Layer-by-layer deposition
  • Lithium battery
  • Pulsed laser deposition

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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