INVESTIGATION OF CAPACITY FADE AND VOLTAGE DECAY IN LI-RICH CATHODE MATERIALS WITH DIFFERENT PHASE COMPOSITION

1 PECHEN Lidia
Co-authors:
1 MAKHONINA Elena 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, Russian Academy of Sciences, Moscow, Russia, lidia.s.maslennikova@gmail.com, elenamakhonina@mail.ru
2 Ioffe Institute, Russian Academy of Sciences, Saint-Petersburg, Russia, yury.koshtyal@gmail.com
3 Peter the Great Saint-Petersburg Polytechnic University, Saint-Petersburg, Russia
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:
144-149
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:
19 views / 5 downloads
Abstract

Lithium-rich oxides with different compositions are synthesized by coprecipitation method and tested as cathode materials for lithium-ion batteries (LIBs). The paper presents research into the degradation processes: capacity and voltage fade during cycling life. The lithium mobility is known to make one of the major contributions to LIBs lifetime. Therefore, galvanostatic intermittent titration (GITT) is provided to estimate lithium-ion diffusion coefficients (DLi+). We also calculate ohmic and polarization resistance values. There is shown the influence of the structural transformation of lithium-rich oxides on their kinetic parameters. We make an assumption about the optimal composition of such cathode materials for good electrochemical properties.

Keywords: Lithium-ion battery, Li-rich cathodes, lithium-ion diffusion, electrochemical properties
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