Significant electrochemical performance improvement of TiSnSb as anode material for Li-ion batteries with composite electrode formulation and the use of VC and FEC electrolyte additives

Henri Wilhelm (1) , C. Marino (2) , Ali Darwiche (2) , Laure Monconduit (2) , Bernard Lestriez (1)

1 IMN - Institut des Matériaux Jean Rouxel
2 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

We report significant electrochemical performance improvement for micron size TiSnSb negative electrode material for Li-ion batteries when formulated with the carboxymethyl cellulose binder and carbon nanofibres and cycled in fluoro ethylene containing electrolyte. It displays a high capacity of approximately 600 mAh g−1, a cycle life of more than 400 cycles, and satisfactory rate capability with a capacity of 250 mAh g−1 even at a rate of 4 Lithium per unit formula in half an hour. TiSnSb could favourably compete with silicon if the practical gravimetric capacity is considered.

Mots clés: Lithium batteries; Composite material; Electrode; Anode; Electrolyte; Binder

Domaines: Matériaux

Henri Wilhelm, C. Marino, Ali Darwiche, Laure Monconduit, Bernard Lestriez. Significant electrochemical performance improvement of TiSnSb as anode material for Li-ion batteries with composite electrode formulation and the use of VC and FEC electrolyte additives. Electrochemistry Communications, 2012, 24, pp.89-92. ⟨10.1016/j.elecom.2012.08.023⟩. ⟨hal-00743338⟩