Interaction of Li1+x(Ni,Mn,Co)O2 cathode materials with single and complex oxides at 900 C

Kurilenko, K.A.; Gorbunov, D.V.; Shlyakhtin, O.A.

Авторы: Kurilenko K.A., Gorbunov D.V., Shlyakhtin O.A.
Журнал: Ionics
Том: 22
Номер: 5
Год издания: 2016
Издательство: Institute for Ionics
Местоположение издательства: Germany
Первая страница: 601
Последняя страница: 607
DOI: 10.1007/s11581-015-1581-1
Аннотация: In order to find efficient barrier materials and inert dopants for the high temperature processing of Li-ion battery cathode materials, a chemical stability of Li1+x(Ni,Mn)O2 at 900°C in air in contact with Al2O3, Nb2O5, SnO2, TiO2 and CeO2 is studied. The interaction of Li1+x(Ni,Mn)O2 with Al2O3, Nb2O5 and SnO2 results in the formation of the corresponding complex oxides - LiAlO2, Li3NbO4 and Li2SnO3. A first stage of the chemical degradation of Li1+x(Ni,Mn)O2 is usually accompanied by the transformation of its hexagonal crystal structure into the cubic one. The reaction of Li1+x(Ni,Mn)O2 with titania is accompanied by the disappearance of TiO2 and the formation of the Li1+x(Ni,Mn)O2-based solid solution. XRD analysis confirmed the absence of chemical interaction of Li1+x(Ni,Mn)O2 with CeO2 while SEM data demonstrated the absence of eutectic melting at 900C. The similar absence of traces of the high temperature chemical interaction with Li1+x(Ni,Mn)O2 is found also for LiAlO2, Li3NbO4 and Li2SnO3. Galvanostatic and cyclic voltammetry studies of Li1+x(Ni,Mn,Co)O2–CeO2 composites demonstrated the increase in the initial discharge capacity of the composite cathodes compared to the native Li1+x(Ni,Mn,Co)O2.
Добавил в систему: Шляхтин Олег Александрович

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Interaction of Li1+x(Ni,Mn,Co)O2 cathode materials with single and complex oxides at 900 Cстатья