Structure and electrochemical properties of LiNi0.5Mn 1.5O4 epitaxial thin film electrodes

Hiroaki Konishi, Kota Suzuki, Sou Taminato, Kyungsu Kim, Sangryun Kim, Jaemin Lim, Masaaki Hirayama, Ryoji Kanno

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The structure and electrochemical properties of epitaxial thin film LiNi0.5Mn1.5O4 electrodes are investigated for lithium ion secondary batteries applications. The orientation and thickness of the LiNi0.5Mn1.5O4 films are controlled by changing the substrate orientation and the pulse laser deposition time, respectively. The lattice parameters of the films increase with film thickness and the manganese valence decreases without any change in the nickel valence. Regardless of their orientation, all the films exhibit reversible capacities of 80-130 mAh g-1. The dependence of the discharge capacity on film thickness indicates a nanosize effect. The electrochemical properties of the high voltage spinel system are significantly dependent on their electronic properties, lattice orientations, and film thicknesses of the electrodes.

Original languageEnglish
Pages (from-to)365-370
Number of pages6
JournalJournal of Power Sources
Volume246
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

Keywords

  • Epitaxial thin film
  • High voltage positive electrode
  • LiNiMnO
  • Lithium ion battery
  • Surface structure

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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