Suppressed ionic contamination of LiNi0.5Mn1.5O4 with a Pt/ITO/stainless steel multilayer current collector

Jong Heon Kim, Jozeph Park, Jun Young Cheong, Aeran Song, Kwun Bum Chung, Yun Chang Park, Il Doo Kim, Yong Joo Kim, Kyusung Park, Hyun Suk Kim

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

LiNi0.5Mn1.5O4 (LNMO) cathode thin films were prepared on Pt-coated stainless steel (SS) substrates by radio-frequency magnetron sputtering. The layers were post-annealed at 500, 600 and 700 °C to study the impact of thermal treatment on the crystallization of the cathode material. As the annealing temperature increases, interdiffusion occurs between the substrate and the LNMO film, which degrades the electrochemical properties of the cathode film. In order to mitigate this problem, an In-Sn-O (ITO) interlayer was introduced between Pt and the SS substrate. The ITO film is electrochemically stable and acts as an effective diffusion barrier between the substrate and the LNMO layer, which results in improved electrochemical properties of the LNMO film for a lithium ion battery.

Original languageEnglish
Pages (from-to)20093-20104
Number of pages12
JournalCeramics International
Volume44
Issue number16
DOIs
StatePublished - Nov 2018

Keywords

  • In-Sn-O
  • Interlayer
  • LiNiMnO
  • Lithium ion battery
  • Sputtering
  • Stainless steel
  • Thin film

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