Preparation and Electrochemical Properties of Amorphous Tin-Copper Composite Oxide CuSnO₃

Abstract:

Composite oxides materials CuSnO₃ as anode materials for lithium-ion batteries were synthesized by chemical coprecipitation method using SnCl₄•5H₂O, NH₃•H₂O and Cu(NO₃)₂•3H₂O as raw materials.The precursor CuSn(OH)₆ and CuSnO₃ powders were characterized by thermogravimertric(TG) analysis and differential thermal analysis(DTA), X-ray diffraction(XRD), and transmission electron microscope (TEM). The electrochemical properties of CuSnO₃ powders as anode materials of lithium ion batteries were investigated comparatively by galvanostatic charge-discharge experiments. The results show the average particle size of amorphous CuSnO₃ is 70nm. The initial capacity during the first lithium insertion is 1078 mA•h/g and the reversible charge capacity in first cycle is 775 mA•h/g. After 20 cycles, the charge capacity is 640 mA•h/g and this material shows moderate capacity fading with cycling. As a novel anode material for lithium ion batteries, amorphous CuSnO₃ demonstrates a large capacity and a low insertion potential with respect to Li metal.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 31-35
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.31
• Online since: June 2012
• Authors: Tao Liu, Rong Bin Du, Xue Jun Kong
• Keywords: Anode Material, Chemical Coprecipitation Method, CuSnO₃, Lithium-Ion Battery

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