KANG, Kisuk; CARLIER-LARREGARAY, Dany; REED, John; ARROYO, Elena M.; CEDER, Gerbrand; CROGUENNEC, Laurence; DELMAS, Claude

doi:10.1021/cm034455+

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KANG, Kisuk
Department of Materials Science and Engineering

CARLIER-LARREGARAY, Dany
Department of Materials Science and Engineering

REED, John
Department of Materials Science and Engineering

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Chemistry of Materials. 2003, vol. 15, n° 23, p. 4503-4507

American Chemical Society

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New Li0.9Ni0.45Ti0.55O2 positive electrode materials were synthesized by means of ion exchange from Na0.9Ni0.45Ti0.55O2. Powder X-ray diffraction (XRD) patterns for these materials indicate that they are isostructural with -NaFeO2. The degree of cation disordering in the material depends critically on the synthesis conditions. Higher temperatures and longer ion-exchange times induce more cation disordering. Surprisingly, the partially disordered phase shows better capacity retention than the least disordered phase. First-principles calculations indicated the poor capacity retention in the least disordered phase could be attributed to the migration of Ti4+ into the Li layer during the electrochemical testing...< Leer menos

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Solid solution

Electrochemical properties

Chemical synthesis

Layered compounds

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Synthesis and electrochemical properties of layered Li0.9Ni0.45Ti0.55O2

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