Continuous composition spread and electrochemical studies of low cobalt content Li(Ni,Mn,Co)O2 cathode materials

Jong Seok Jung, Haena Yim, Narendra Singh Parmar, Jae-Seung Lee, Ji Won Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Many scientific efforts have been undertaken toward reducing the Co content in LiMn1/3Ni1/3Co1/3O2 cathode materials for thin-film batteries. In this study, we present cathodes with a wide range of Li(Ni, Mn, Co)O2 compositions to determine the material with the best electrochemical performance by changing the ratio of Ni to Mn at a fixed 0.1 at.% of Co by the continuous composition spread sputtering method. The cathode composition measurements by Rutherford backscattering spectroscopy show that the best electrochemical performance is obtained for a composition of Ni:Mn:Co = 19:71:10. The reasons for this improved electrochemical performance are further investigated by X-ray diffraction, electrochemical impedance spectroscopy, Fourier-transform infrared spectroscopy, and X-ray absorption near edge spectroscopy.

Original languageEnglish
Article number366
JournalCoatings
Volume9
Issue number6
DOIs
Publication statusPublished - 2019 Jun 1

Keywords

  • Continuous composition spread
  • Li(Ni; Mn; Co)O cathode
  • Low cobalt content
  • Thin film
  • X-ray near edge spectroscopy

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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