ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

For citation:

Bushkova O. V., Andreev O. L., Batalov N. N., Shkerin S. N., Kuznetsov M. V., Tyutyunnik A. P., Koryakova O. V., Song E. H., Chung H. J. Chemical interaction in the cathode half-element of lithium ion batteries. Electrochemical Energetics, 2005, vol. 5, iss. 2, pp. 74-?.

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Language: 
Russian
Article type: 
Article

Chemical interaction in the cathode half-element of lithium ion batteries

Autors: 
Bushkova Ol'ga Viktorovna, Institute of Solid State Chemistry
Andreev O. L., Institute of high-temperature Electrochemistry UB of RAS
Batalov Nikolai Nikolaevich, Institute of high-temperature Electrochemistry UB of RAS
Shkerin S. N., Institute of high-temperature Electrochemistry UB of RAS
Kuznetsov M. V., Institute of Solid State Chemistry
Tyutyunnik A. P., Institute of Solid State Chemistry
Koryakova O. V., Institute of Organic Synthesis of I. Ya. Postovskogo UB of RAS
Song E. H., Corporate R&D Center of Samsung SDI Co., Ltd.
Chung H. J., Corporate R&D Center of Samsung SDI Co., Ltd.
Abstract: 

Chemical interactions in the cathode half-element of lithium ion batteries with LiCoO2 as cathode and 1.15 M ILiPF6, in mixture of al-kylcarbonates as electrolyte had been studied by using a number of calculation and experimental methods. It was found that the layer of chemical interactions products on the surface of LiCoO2 grains comprised LiF and LiPO3 and, also, CoF2, which passed to the electrolyte solution with time. Moreover, the LiCoO2 surface was covered with a layer of alkyl carbonate polymerization products. It was demonstrated that the performance of the batteries was impaired due to the mutual thermodynamic instability of LiCoO2 and LiPF6. The electron short-circuiting which was due to appearance of Соn+ ions in the electrolyte contributed most to the batteries degradation process.