Structural and electrochemical properties of Li-Ni-Co oxides synthesized by wet chemistry via a succinic-acid-assisted technique
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Structural and electrochemical properties of Li-Ni-Co oxides synthesized by wet chemistry via a succinic-acid-assisted techniqueData
2001Cita bibliográfica
Castro-García S, Julien C, Señarís-Rodríguez MA. Structural and electrochemical properties of li-ni-co oxides synthesized by wet chemistry via a succinic-acid-assisted technique. International Journal of Inorganic Materials. 2001;3(4-5):323-9.
Resumo
[Abstract] Lithiated metal oxides LiCo1−yNiyO2 were synthesized by a sol–gel method using succinic acid as chelating agent. Microcrystalline materials were formed by calcination in oxygen at 800°C. The physicochemical properties of the powders (crystallinity, lattice constants, size grain) has been investigated in the compositional range 0≤y≤1. Structural studies show that a layered single phase was obtained. The local cationic environment has been studied by Raman and FTIR spectroscopy. The changes in the vibrational spectra are well related to those observed by X-ray diffraction. It is shown that the lithium predominant layers are preserved in the entire range of substitution. Pelletized LiCo1−yNiyO2 powders (0.2≤y≤1.0) were tested in Li//LiCo1−yNiyO2 cells by galvanostatic titration. These cells have an initial capacity of 140 mAh/g in the voltage range 2.8–4.2 V and show attractive charge–discharge profiles upon cycling.
Palabras chave
Rechargeable Li cell
Sol–gel method
Li–Ni–Co oxides
Sol–gel method
Li–Ni–Co oxides
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ISSN
1466-6049