Structural and electrochemical properties of LiNi0.70Co0.15Al0.15O2

Marianne Guilmard (1) , Caroline Pouillerie (1) , Laurence Croguennec (1) , Claude Delmas (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

LiNi0.70Co0.15Al0.15O2 has been synthesized by a coprecipitation method. The structural characterization by X-ray and neutron diffraction, associated with a Rietveld analysis, has confirmed a segregation tendency for cobalt and aluminum ions. However, a quasi-ideal lamellar structure was obtained for this phase, with less than 1% extra-nickel ions in the interslab space. Cycling tests have shown a very good cycling stability with a high reversible capacity of about 150 mAh/g in the 3–4.15 V range at the C/20 rate.

Mots clés: Intercalation; Lithium battery; LiNiO2; Aluminum substitution; Cobalt substitution; Diffraction

Domaines: Matériaux

Marianne Guilmard, Caroline Pouillerie, Laurence Croguennec, Claude Delmas. Structural and electrochemical properties of LiNi0.70Co0.15Al0.15O2. Solid State Ionics, 2003, 160 (1-2), pp.39-50. ⟨10.1016/S0167-2738(03)00106-1⟩. ⟨hal-00207941⟩