Work

Studies on Formation and Decomposition of the Layered Cobaltite Li x Na y CoO2

Year: 2011

Type: article

Abstract: Lithium-sodium cobaltite LixNayCoO2( x≈y≈0.5 ) with ordered layered structure is promising thermoelectric material. Here we report the peculiarities of this phase formation and decomposition processes studied by TG/DTA, XRD, SEM, and TEM methods. Significant weight loss resulting from oxygen liberation and endothermic effect at T≈1000 °C are the main features of the LixNayCoO2formation. Decomposition of the ordered phase is accompanied by exothermic effect at ≈940 °C and the weight increase. Electron microscopic study shows that the lithium-sodium cobaltite decomposes into LiCoO2and γ-Na0.7CoO2. Lattices of the initial phase and formed ones demonstrate mutual orientation.

Source: International Journal of Inorganic Chemistry

DOI: 10.1155/2011/649183

Authors: A. S. Semenova, R. F. Samigullina, E. V. Shalaeva, N. I. Kourov, D. G. Kellerman

Institutions: Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, M.N. Mikheev Institute of Metal Physics, Ural Federal University

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funder: Russian Foundation for Basic Research

Awards: G2279311221, G2589033580