mESC-IS 2021, 5 th Int. Symp on Materials for Energy Storage and Conversion, Muğla, Turkey, 14 - 17 September 2021, pp.7
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.