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LiNi 0.6 Co 0.2 Mn 0.2 O 2 , an α-NaFeO 2  type layered lithium transition metal oxide, is deemed as one of the most promising cathode materials for lithium-ion batteries. To ascertain the structural evolution and formation mechanism of this compound during high-temperature solid-state synthesis, thermal and structural analysis methods were performed, confirmed with the characterization of morphology and lithium residue. LiOH, used as the lithium source, showed both a lower initial temperature and a lower degree of lithium intercalation compared to Li 2 CO 3  when reacting with the precursor. A higher temperature for Li 2 CO 3  and a longer reaction time for LiOH during sintering would be beneficial to the material synthesis. Furthermore, a pre-heat treatment process in the temperature range of 400–600°C is beneficial for the lithium intercalation reaction.

Structural evolution and formation mechanism of LiNi 0.6 Co 0.2 Mn 0.2 O 2 during high-temperature solid-state synthesis