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Study on the feasibility of metallic saggar for synthesizing NCM cathode active materials-I

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2024, 34(3), pp.103-107
  • DOI : 10.6111/JKCGCT.2024.34.3.103
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : June 10, 2024
  • Accepted : June 13, 2024
  • Published : June 30, 2024

Yong Il Park 1 JiHoon Jung 2 Sung Hyun Woo 2 JUNG HEON LEE 2 Kim Hyeong Jun 1

1한국세라믹기술원
2성균관대학교

Accredited

ABSTRACT

In this study, nickel, a pure metal material, was proposed as a saggar for synthesizing NCM [Li(NixCoyMnz)O₂] cathode active material. Nickel is known as a metal that is resistant to oxidation and has a high melting point. Nickel is one of the main components of NCM cathode material and was expected to be free from problems with contamination from saggar during cathode material synthesis. We sought to confirm the possibility of nickel as a saggar for synthesizing NCM cathode active materials. When a Ni metal crucible and Ni0.8Co0.1Mn0.1(OH)₂ (NCM 811) precursor material were reacted at 900°C for a long time, the change in the reaction layer on the surface of the crucible over time was analyzed. The nickel crucible reaction layer formed during heat treatment at 900°C was nickel oxide, and is thought to have been created by simultaneous oxygen diffusion from the cathode precursor oxide and reaction with oxygen in the atmosphere. The change in thickness of the oxide layer appears to slow down after 480 hours, which suggests that the rate of oxygen diffusion from the precursor is reduced. It remained combined without falling out of the crucible until 480 hours. However, it was confirmed that the oxide layer falls off after 720 hours, so it is thought that it can be used as saggar for NCM synthesis only for a certain period of time.

Citation status

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