Gipronickel Institute LLC, St. Petersburg, Russia

Ya. I. Kosov, Senior Researcher, R&D Department, Pyrometallurgy Laboratory, Candidate of Technical Sciences, e-mail: KosovYaI@nornik.ru
D. M. Bogatyrev, Researcher, R&D Department, Pyrometallurgy Laboratory, e-mail: BogatyrevDM@nornik.ru
E. A. Ivanova, 2^nd Category Engineer, R&D Department, Pyrometallurgy Laboratory, e-mail: IvanovaElAn@nornik.ru
V. V. Pakalnis, Researcher, R&D Department, Hydrometallurgy Laboratory, e-mail: PakalnisVV@nornik.ru

As part of the implementation of investment projects to expand the product line of PJSC MMC Norilsk Nickel, Gipronickel Institute conducted studies on the synthesis of precursors of cathode materials (PCAM) and the production of cathode materials (CAM) for lithium-ion batteries — products with high added value. Based on the results of the analysis of scientific literature, it was noted that the methods of high-temperature lithiating roasting are characte rized by diversity. In this regard, the article presents the results of exploratory laboratory studies on the production of active cathode materials (CAM) based on layered lithium-nickel-cobalt-manganese oxide by high-temperature treatment of precursor compounds (PCAM) with a lithium source using single-stage and twostage technologies. A comparison of the electrochemical characteristics of the cathode materials obtained using different technologies was carried out, their chemical and phase compositions, granulometric characteristics, as well as the morphology of the particle surface were studied. When analyzing the cathode materials using the X-ray phase analysis method, it was found that when hightemperature lithiating roasting is carried out using a single-stage technology, the intensity ratio I003/I104 is higher than when the process is carried out in two stages, which indicates reduced cationic mixing between lithium and nickel ions. As a result, the electrochemical characteristics of the cathode materials obtained using the single-stage scheme are improved. Comparison of the cathode materials obtained in this work with commercial samples produced in China indicates that the selected roasting conditions make it possible to obtain products that largely correspond to the level on the world market of lithium-ion batteries.

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