Express and low-cost microwave synthesis of the ternary Chevrel phase Cu2Mo6S8 for application in rechargeable magnesium batteries

Fabrizio Murgia (1, 2) , Philippe Antitomaso (1, 2) , Lorenzo Stievano (2, 1) , Laure Monconduit (1, 2) , Romain Berthelot (1, 2)

1 RS2E - Réseau sur le stockage électrochimique de l'énergie
2 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

The ternary Chevrel phase Cu2Mo6S8 was successfully synthetized using a simple and cost-effective solid-state microwave-assisted reaction. While solid-state routes require days of high-temperature treatment under inert atmosphere, highly pure and crystalline Cu2Mo6S8 could be obtained in only 400 s from this precursor, the Chevrel binary phase Mo6S8 was then obtained by copper removal through acidic leaching, and was evaluated as a positive electrode material for Mg-battery. The electrochemical performance in half-cell configuration shows reversible capacity exceeding 80 mAh/g, which is comparable to previous works carried out with materials synthesized by conventional high-temperature solid-state routes.

Domaines: Chimie

Fabrizio Murgia, Philippe Antitomaso, Lorenzo Stievano, Laure Monconduit, Romain Berthelot. Express and low-cost microwave synthesis of the ternary Chevrel phase Cu2Mo6S8 for application in rechargeable magnesium batteries. Journal of Solid State Chemistry, 2016, 242, pp.151. ⟨10.1016/j.jssc.2016.07.022⟩. ⟨hal-01350635⟩