Effect of surface Li3PO4 coating on LiNi 0.5Mn1.5O4 epitaxial thin film electrodes synthesized by pulsed laser deposition

Hiroaki Konishi, Kota Suzuki, Sou Taminato, Kyungsu Kim, Yueming Zheng, Sangryun Kim, Jaemin Lim, Masaaki Hirayama, Jin Young Son, Yitao Cui, Ryoji Kanno

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The effect of Li3PO4 coating was investigated for LiNi0.5Mn1.5O4 epitaxial thin film electrodes synthesized on SrTiO3 substrates by pulsed laser deposition (PLD). Amorphous Li3PO4 with a thickness of 1-4 nm was coated at room temperature onto 30 nm thick epitaxial LiNi0.5Mn 1.5O4 thin films with (111), (110) and (100) lattice orientations. Electrodes with the surface coating exhibit high charge-discharge capacities and small capacity degradation during cycling experiments in the high voltage region. X-ray absorption near edge structure (XANES) and hard X-ray photoelectron spectroscopy (HAXPES) analyses indicate a higher manganese valence for the electrode surface of the Li3PO4 stacked LiNi 0.5Mn1.5O4 film than that for the surface of a pristine LiNi0.5Mn1.5O4 film. Thus, surface coating affects the manganese valence near the electrode surface and improves the cycling characteristics.

Original languageEnglish
Pages (from-to)293-298
Number of pages6
JournalJournal of Power Sources
Volume269
DOIs
Publication statusPublished - 2014 Dec 10
Externally publishedYes

Keywords

  • Epitaxial thin film
  • High voltage positive electrode
  • Lithium ion battery
  • Spinel
  • Surface coating

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effect of surface Li<sub>3</sub>PO<sub>4</sub> coating on LiNi <sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> epitaxial thin film electrodes synthesized by pulsed laser deposition'. Together they form a unique fingerprint.

Cite this