WEILL, François; TRAN, Nicolas; MARTIN, Nelly; CROGUENNEC, Laurence; DELMAS, Claude

doi:10.1149/1.2746516

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WEILL, François
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de Ressources en Microscopie Electronique et Microanalyse

TRAN, Nicolas
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

MARTIN, Nelly
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Electrochemical and Solid-State Letters. 2007, vol. 10, n° 8, p. A194-A197

Electrochemical Society

Résumé en anglais

A long and irreversible plateau is observed for Li1.12(Ni0.425Mn0.425Co0.15)0.88O2. The layered Liy(Ni0.425Mn0.425Co0.15)0.88O2 (y=0.93 and 0.73) materials were prepared by discharging to 3.2 V Li//Liy(Ni0.425Mn0.425Co0.15)0.88O2 cells charged up to 4.4 V (beginning of the plateau) and 4.8 V (end of the plateau), respectively. The structure was investigated using the combination of X-ray and electron diffraction experiments to study a possible structural evolution upon cycling of the superstructure observed for the pristine material. The disappearance of the superlattice lines in the 19.5–34° (2fCu) range in the X-ray diffraction pattern as well as that of the diffuse disorder scattering lines (or the extra spots) in the electron diffraction patterns were clearly observed for Li0.73(Ni0.425Mn0.425Co0.15)0.88O2...< Réduire

Mots clés en anglais

Layered oxides

Cation ordering

X-ray diffraction

Electron diffraction

Lithium-ion battery

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Electron diffraction study of the layered Liy(Ni0.425Mn0.425Co0.15)0.88O2 materials reintercalated after two different states of charge

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