Preparation of tin nanocomposite as anode material by molten salts method and its application in lithium ion batteries

摘要

A nanocomposite material (SnO_2-Co_3O_4) has been synthesized as an anode material for lithium-ion batteries by the molten salt method. Characterization by X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed that the composite has a small particle size. The electrochemical performance was examined, including the charge-discharge and cycling properties. The experimental results showed thatrnthe sample containing the highest amount of CO_3O_4 compound exhibited a specific capacity of 355 mAh g~(-1) after 40 cycles, with cycling at 70mA g~(-1) (35.2% higher than for the sample containing a lower amount of Co_3O_4). It seems that increasing the amount of CO_3O_4 can give good capacity retention and high specific capacity.