ELECTROCHEMICAL, STRUCTURAL, AND MAGNETIC STUDY OF LI-RICH CATHODE MATERIALS FOR LITHIUM-ION BATTERY

1 MAKHONINA Elena
Co-authors:
1 PECHEN Lidia 1 VOLKOV Vyacheslav 2,3 RUMYANTSEV Alexander 2,3 KOSHTYAL Yury 1 POLITOV Yury 1 PERVOV Vladislav 1 EREMENKO Igor
Institutions:
1 Kurnakov Institute of General and Inorganic Chemistry of RAS, Moscow, Russian Federation, elenamakhonina@mail.ru, lidia.s.maslennikova@gmail.com, svolkov77@gmail.com
2 Ioffe Institute, Saint-Petersburg, Russian Federation, rumyantsev.amr@gmail.com
3 Peter the Great St.Petersburg Polytechnic University, Saint-Petersburg, Russian Federation, yury.koshtyal@gmail.com
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
137-143
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
Published:
1st April 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
54 views / 15 downloads
Abstract

Li-rich oxides of different phase compositions xLi2MnO3·(1-x)LiMO2 are synthesized by coprecipitation of mixed transition metal carbonates followed by solid-state reaction with lithium hydroxide. X-ray powder diffraction, scanning electron microscopy, and magnetic studies are used to characterize the pristine structure of the oxides with different compositions. The materials are tested as positive electrode in lithium half-cells. Galvanostatic charge-discharge measurements are performed at different current densities. The lithium-ion diffusion coefficients (DLi+) are estimated from the cyclic voltammetry experiments and found to reach maximum values for composition at x=0.35 having the best electrochemical characteristics.

Keywords: Lithium-rich cathodes, electrochemical properties, lithium-ion diffusion, magnetic measurements
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