CoSn alloy and Cu-Sn samples were syn thesized by H 2 -reduction following solid-state r eaction between Co ?,Cu?,Sn?and NaOH at ambient temperature.The samples were characterized by XRD,S EM.The results showed that C...CoSn alloy and Cu-Sn samples were syn thesized by H 2 -reduction following solid-state r eaction between Co ?,Cu?,Sn?and NaOH at ambient temperature.The samples were characterized by XRD,S EM.The results showed that CoSn alloy(80～200nm)is globe-shaped,ultrafine hexagon al material,and Cu-Sn alloy powder consists of two phases,i.e.Cu 6 Sn 5 and Cu 3 Sn.Cu-Sn powder has spherical morphology and the particle size is estimated to be 60～70nm.The electro chemical performances of CoSn alloy and Cu-Sn powder were studied using lithium-ions model cell Li /LiPF 6 (EC +DMC)/CoSn(or Cu-Sn).It was demonstrated the reversible discharge capacities for 10cycles keep above 280mAh ·g -1 for nanophase Cu-Sn,and 60mAh ·g -1 for CoSn alloy.Differ-ential capacity plots showed that th e reaction mechanisms of Cu-Sn with l ithium were reversible.展开更多
文摘CoSn alloy and Cu-Sn samples were syn thesized by H 2 -reduction following solid-state r eaction between Co ?,Cu?,Sn?and NaOH at ambient temperature.The samples were characterized by XRD,S EM.The results showed that CoSn alloy(80～200nm)is globe-shaped,ultrafine hexagon al material,and Cu-Sn alloy powder consists of two phases,i.e.Cu 6 Sn 5 and Cu 3 Sn.Cu-Sn powder has spherical morphology and the particle size is estimated to be 60～70nm.The electro chemical performances of CoSn alloy and Cu-Sn powder were studied using lithium-ions model cell Li /LiPF 6 (EC +DMC)/CoSn(or Cu-Sn).It was demonstrated the reversible discharge capacities for 10cycles keep above 280mAh ·g -1 for nanophase Cu-Sn,and 60mAh ·g -1 for CoSn alloy.Differ-ential capacity plots showed that th e reaction mechanisms of Cu-Sn with l ithium were reversible.
