Structure and electrochemical properties of cobalt-doped lithium-manganese spinels for rechargeable lithium power sources

A series of doped lithium-manganese spinels with a common formula LiMn_2-xСо_xO₄, 0 < х < 1, and LiMn_2-x-yCr_xСо_yO₄, 0 < х + у < 1, was synthesized. The structural and electrochemical properties of these compounds were studied. Replacement of Mn atoms in LiMn₂O₄ by Co or Co&Cr ones in a Mn:Me 195:5 ratio is shown to reduce the degradation of the discharge capacity at cycling with no decrease of its magnitude.

Authors:

Kachibaya E. I., Institute of Inorganic Chemistry and Electrochemistry of R. I. Agladze of AN of Georgia, 11, Mingdeli St., Tbilisi

Imnadze R. A., Institute of Inorganic Chemistry and Electrochemistry of R. I. Agladze of AN of Georgia, 11, Mingdeli St., Tbilisi

Paikidze T. V., Institute of Inorganic Chemistry and Electrochemistry of R. I. Agladze of AN of Georgia, 11, Mingdeli St., Tbilisi

Karseeva E. I., Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, 31, Leninsky Ave, Moscow, 119071

Korovin Nikolai Vasil'evich, National Research University "MEI", 14, Krasnokazarmennaya St., Moscow, 111250, NVKorovin@mail.ru

Kulova Tat'yana L'vovna, Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, 31, Leninsky Ave, Moscow, 119071, tkulovat@mail.ru

Skundin Aleksandr Mordukhaevich, Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, 31, Leninsky Ave, Moscow, 119071, askundin@mail.ru

Journal issue:

2002. Т. 2, № 1,