ISSN:
1573-8663
Keywords:
Li-Ni-Co oxides
;
Raman
;
FTIR
;
electrochemical properties
;
lithium batteries
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract In this paper, we report the synthesis, the physical properties and the electrochemical features of the lithium nickel-cobalt oxide cathode materials prepared by a combustion method at moderate temperature. Structural properties were investigated by X-ray diffraction, Raman scattering and FTIR. Spectroscopic measurements show unambiguously that the final product is identified as a modified-spinel structure (Fd3m space group) with the stoichiometric formula Li2[Ni0.5Co0.5]2O2. Electrochemical cells Li//Li2[Ni0.5Co0.5]2O2 were fabricated using an organic electrolyte and their performances were tested. For a modified-spinel Li2[Ni0.5Co0.5]2O4 structure the chemical diffusion coefficient of Li ions is around 10−10 cm2s, which is lower than for a layered LiNi0.5Co0.5O4 host matrix.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009930317366
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