Revisiting and improving the preparation of silicon-based electrodes for lithium-ion batteries: ball milling impact on poly(acrylic acid) polymer binders

Thibaut Chartrel (1, 2) , Mariama Ndour , Véronique Bonnet (3) , Sébastien Cavalaglio (1, 2) , Luc Aymard (1) , Franck Dolhem (2, 3) , Laure Monconduit (4, 2) , Jean-Pierre Bonnet (1, 2)

1 LRCS - Laboratoire réactivité et chimie des solides - UMR CNRS 7314
2 RS2E - Réseau sur le stockage électrochimique de l'énergie
3 LG2A - Laboratoire de Glycochimie, des Antimicrobiens et des Agro-ressources - UMR CNRS 7378
4 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

ZnSnSb2 intermetallic alloy as anode material for Li-ion batteries has been investigated for the first time in this work. This material is able to deliver a high capacity of 615 mAh/g for 200 cycles at 4C (a current density of 0.25 A/g) with a good a coulombic efficiency exceeding 99.3 %. Furthermore, the electrode material exhibit a high rate capability between C/5 (12.6 mA/g) and 10C (630 mA/g), with a reversible capacity loss of 19% and a polarization increasing of only 0.05 V. Among all reported MSnSb (with M= Ag, Ti, Cu…) alloys, ZnSnSb2 exhibits the most outstanding rate capability and long cycling life. The observed behavior can be linked not only to the quasi-topotactic de/lithiation reaction between the ZnSnSb2 and Li3Sb but also to the solid solution mechanism evidenced from operando X-ray diffraction analysis. This suggests that the electrode exhibits a great resistance to the volume expansion and the mechanical stress during cycling even at high cycling rates (10C).

Domaines: Matériaux

Thibaut Chartrel, Mariama Ndour, Véronique Bonnet, Sébastien Cavalaglio, Luc Aymard, et al.. Revisiting and improving the preparation of silicon-based electrodes for lithium-ion batteries: ball milling impact on poly(acrylic acid) polymer binders. Materials Chemistry Frontiers, 2019, 3, pp.881-891. ⟨10.1039/c8qm00660a⟩. ⟨hal-02090028⟩