Thermal stability of lithium nickel oxide derivatives. Part I: LixNi1.02O2 and LixNi0.89Al0.16O2 (x = 0.50 and 0.30)

Marianne Guilmard (1) , Laurence Croguennec (1) , Dominique Denux (1) , Claude Delmas (1)

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

The thermal degradation mechanism of LixNi1.02O2 and LixNi0.89Al0.16O2 (x = 0.50 and 0.30) was studied by in situ X-ray diffraction correlated with thermal gravimetric analysis coupled with mass spectrometry. The degradation mechanism appears to be the same for both types of samples. It consists of two steps: the first step, corresponding to the lamellar to pseudo-spinel transformation, is accompanied by an oxygen loss only for compounds with an initial (Li + M)/O ratio (M = Ni, Al) smaller than 3/4...

Mots clés: Thermal stability; Solid solution; Lithium nickel oxide

Domaines: Matériaux

Marianne Guilmard, Laurence Croguennec, Dominique Denux, Claude Delmas. Thermal stability of lithium nickel oxide derivatives. Part I: LixNi1.02O2 and LixNi0.89Al0.16O2 (x = 0.50 and 0.30). Chemistry of Materials, 2003, 15 (23), pp.4476-4483. ⟨10.1021/cm030059f⟩. ⟨hal-00171040⟩