Supercritical CO2-Approach to Prepare Lithium-rich Layered Metal Oxide Material for Li-ion Batteries

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Yalçın A., Demir M., Gönen M., Akgün M.

mESC-IS 2021, 5 th Int. Symp on Materials for Energy Storage and Conversion, Muğla, Türkiye, 14 - 17 Eylül 2021, ss.7

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Muğla
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.7
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Li-rich layered metal oxides (Li-NMC) are widely preferred in applications requiring high voltage and high energy density due to their high electrochemical properties. These materials are used as the cathode electrode in the lithium-ion battery and they are the most expensive part of the battery. Li-NMC materials have been produced by traditional methods such as the co-precipitation method, sol-gel method, ion exchange method and combustion synthesis method. The disadvantages of these methods are the high calcination temperatures and longer calcination times. Other disadvantages are the use of organic chemicals, such as oxalic acid, sodium carbonate, citric acid, ethylene glycol, ethanol and ammonia, etc. utilized during the production of these cathode materials. In this study, the supercritical CO2-assisted method was investigated for the synthesis of Li1.2Mn0.52Ni0.20Co0.08O2. This method has enabled to decrease in the thermal decomposition temperature of lithium, nickel, manganese and cobalt nitrate salts. Li-rich layered cathode materials synthesized in this study were characterized by using XRD, SEM, EDS and ICP. The electrochemical characterizations were carried out using CR2032 coin cells at room temperature.