Physical investigation of the mechanisms of lithium insertion in sulfides as anode materials for lithium-ion batteries

Rémi Dedryvère (1) , J. Olivier-Fourcade (2) , J.C. Jumas (2)

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
2 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

Electrochemical and chemical lithium insertion (via n-butyllithium) were carried out on a family of spinel phases of the Cu2S-In 2S3-SnS2 system. Electrochemical measurements have revealed great reversible capacities and the possible use of these materials as negative electrodes in lithium-ion batteries, ll9Sn Mössbauer spectroscopy, 7Li NMR and S K edge EXAFS spectroscopy were carried out to characterize the mechanisms of lithium insertion. This study has shown the formation of lithium-metal alloys finely dispersed in an amorphous lithium sulfide matrix at low potentials. A model is proposed to explain the great capacities observed in these materials.

Domaines: Matériaux

Rémi Dedryvère, J. Olivier-Fourcade, J.C. Jumas. Physical investigation of the mechanisms of lithium insertion in sulfides as anode materials for lithium-ion batteries. Ionics, 2000, 6 (5-6), pp.397-402. ⟨10.1007/BF02374159⟩. ⟨hal-01560713⟩