CuFe 2 S 3 as electrode material for Li-ion batteries.

Electrochemical performances of the isocubanite CuFe 2 S 3 tested as electrode material for Li-ion batteries have been investigated. A first discharge capacity of 860 mA h g -1 shows a conversion process leading to Li 2 S, copper and iron nanoparticles. Interestingly, a reversible capacity of 560 mA h g -1 at 1.5 V is demonstrated with good cyclability up to 30 cycles.