Li2SnO3 derived secondary Li–Sn alloy electrode for lithium-ion batteries

摘要: Abstract As a possible high-capacity Li-ion battery anode material, Li2SnO3 was prepared via solid-state reaction route and sol–gel route, separately. Its electrochemical performance tested in coin-type cells with metallic Li as the counter electrode. The results show that derived has uniform nano-sized particles (200–300 nm) can deliver better reversible capacity (380 mAh/g after 50 cycles voltage window of 0–1 V) than from route. characterizations by means galvanostatic cycling, cyclic voltammetry ex situ X-ray diffraction indicate process lithiation proceeds an initial structural reduction composite oxide into Sn-metal Li2O followed Li–Sn alloy formation matrix. Due to buffer role matrix, reversibility secondary electrode is largely secured.