Preparation and Electrochemical Properties Analysis of CuO-Doped Nano-SnO2 Powders as Anode Materials for Lithium Ion Batteries

Abstract

Abstract: CuO-doped nano-SnO₂ powders were prepared by chemical coprecipitation method using SnCl₄·5H₂O,NH₃·H₂O,and Cu(NO₃)₂·3H₂O as raw materials.The powders were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).The electrochemical properties of CuO-doped nano-SnO₂ powders and undoped SnO₂ powders as anode materials of lithium ion batteries were investigated comparatively by charge-discharge curves,cyclability and AC impedance.Results show that SnO₂ -CuO nano composite powders with average particle size of 87 nm could be obtained through chemical coprecipitation method.The structure of SnO₂ was not changed,but the average particle size of nano-SnO₂ decreased due to the introduction of CuO.CuO-doped nano-SnO₂ powders show a reversible capacity of 752 mA·g^-1 and better cyclability compared with undoped nano-SnO₂ .The capacity retention rate of undoped nano-SnO₂ and CuO-doped nano-SnO2 powders is 93.6% and 92.0% at 0.1 C rate,respectively,which suggests that introduction of CuO in SnO₂ can improve the cyclability of nano-SnO₂ .

Key words: tin oxide, CuO-doped, lithium ion batteries, electrochemical properties

HE Ze-Qiang, XIONG Li-Zhi, MA Ming-You, WU Xian-Ming, XIAO Zhuo-Bing. Preparation and Electrochemical Properties Analysis of CuO-Doped Nano-SnO₂ Powders as Anode Materials for Lithium Ion Batteries[J]. journal6, 2009, 30(3): 91-94.

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Preparation and Electrochemical Properties Analysis of CuO-Doped Nano-SnO₂ Powders as Anode Materials for Lithium Ion Batteries

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