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Sukhov V. V., Ovsyannikov V. M., Dmitrienko A. O., Bylinkina N. N. Comparative examination of LiyNixCo1-xO2 materials for lithium-ion battery cathodes. Electrochemical Energetics, 2001, vol. 1, iss. 1, pp. 62-65.

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Comparative examination of LiyNixCo1-xO2 materials for lithium-ion battery cathodes

Sukhov V. V., Saratov State University
Ovsyannikov V. M., Saratov State University
Dmitrienko Aleksandr Olegovich, Saratov State University
Bylinkina N. N., Saratov State University

A number of LiyNixCo1-xO2 compounds were synthesised by means of solid-state annealing. The synthesis conditions (the raw components, temperature, duration) were optimized so that phases with y > 0.97 were obtained suitable for making positive electrodes for lithium-ionic batteries. The charge-discharge characteristics of such LiyNixCo1-xO2. electrodes were studied. The charging curves of several first cycles are slanted, the corresponding capacity reaches 120-130 mA·h/g. The capacity corresponding to further cycles essentially depends on x and y. The electrodes with x = 1 showed an obvious tendency to decrease their capacity in the course of cycling while the cobalt-containing compounds have more stable electrochemical characteristics. The materials based on mixed oxides of lithium, nickel and cobalt seem promising for making lithium-ionic battery cathodes from every viewpoint.

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