Structural studies and selected physical investigations of LiCoO2 obtained by combustion synthesis

Submitting author affiliation:
Lukasiewicz Research Network - Institute of Microelectronics and Photonics, Warsaw, Poland

Beilstein Arch. 2022, 202276.

Published 22 Sep 2022



The nanocrystalline powders of LiCoO2 were synthesized using a modified solution combustion method and the effects of the annealing temperature (450-900°C) on the structure and composition were investigated using various methods, including XRD, SEM, EPR, and electrical studies. It was found that as the process temperature increases, the value of the specific surface area decreases, and hence the size of the crystallites increases. XRD analysis showed that the phase pure LiCoO2 material was maintained without additional phases. The EPR studies revealed the presence of two Ni3+ complexes. The electrical properties of the studied LiCoO2 samples were investigated by impedance spectroscopy. Comparison of the effect of annealing temperature on electrical conductivity shows a very interesting behavior. As the annealing temperature increases, the DC conductivity value increases, reaching a maximum at the temperature of 500°C. However, further increase in the annealing temperature causes a steady decrease in the DC conductivity.

Keywords: Lithium-ion battery, solution combustion synthesis, lithium cobalt oxide, nanocrystalline powder

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Michalska, M.; Ławniczak, P.; Strachowski, T.; Ostrowski, A.; Bednarski, W. Beilstein Arch. 2022, 202276. doi:10.3762/bxiv.2022.76.v1

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