Phase separation and amorphisation in lithium inserted Cu-In-Sn sulfospinels: Experimental and theoretical approach

Rémi Dedryvère (1) , S. Denis (2) , P.E. Lippens (3) , J. Olivier-Fourcade (3) , J.C. Jumas (3)

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
2 LRCS - Laboratoire réactivité et chimie des solides - UMR CNRS 7314
3 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

119Sn Mössbauer spectroscopy, X-ray diffraction (XRD) and electrochemical experiments were carried out to characterise the reaction mechanism of lithium with spinel phases CuxInySnzS4. The electrochemical investigations have shown interesting reversible capacities for these materials, and their possible use as anode materials in lithium-ion cells. This analysis reveals a multi-phase mechanism linked to the reduction of the cations involving a spinel to rocksalt transformation followed by a structural breakdown. Density functional calculations by the linearised augmented plane wave (LAPW) method give a good interpretation of experimental results for crystalline phases. © 2001 Elsevier Science B.V.

Domaines: Matériaux

Rémi Dedryvère, S. Denis, P.E. Lippens, J. Olivier-Fourcade, J.C. Jumas. Phase separation and amorphisation in lithium inserted Cu-In-Sn sulfospinels: Experimental and theoretical approach. Journal of Power Sources, 2001, 97-98, pp.204-207. ⟨10.1016/S0378-7753(01)00661-9⟩. ⟨hal-01560712⟩