Russian Journal of Physical Chemistry A. Vol. 96, No. 2, Pages 437-443, 2022

P. V. Kornev^a^,*, T. L. Kulova^b^,**, A. A. Kuz’mina^b, E. K. Tusseeva^b, A. M. Skundin^b, V. M. Klimova^a, and E. S. Koshel’^c^,^d***

^bFrumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, 119071 Russia

^cGiredmet State Research and Design Institute of the Rare Metals Industry, Moscow, 111524 Russia

^dKurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991 Russia

Correspondence to: *e-mail: pas-kornev@rambler.ru
Correspondence to: **e-mail: tkulova@mail.ru
Correspondence to: ***e-mail: lizaveta567@yandex.ru

Abstract—Lithium titanate doped with europium (0.2 to 2.0 wt %) is prepared via high-temperature solid-phase synthesis. Processes of the lithium insertion into such a material are studied. It is established that doping with europium allows the final potential of the reversible insertion of lithium to 0.01 V to be shifted. It also contributes to an increase in the specific discharge capacity, a reduction in the specific irreversible capacity, and a drop in the polarization of electrodes. It is found that the specific discharge capacity of samples with doping of 1.0–1.6 wt % is 214 mA h/g at a current of 20 mA/g and ~50 mA h/g at a current of 3200 mA/g.

Europium-Doped Lithium Titanate As a Material for the Anodes of Lithium-Ion Batteries