Li4Ti5O12 powders were prepared by so-gel method using tetrabutyl titanate,lithium acetate and absolute alcohol as starting materials.Li4Ti5O12-polyaniline(Li4Ti5O12-PAn)composite was prepared by in situ polymerization method using aniline, ammonium persulfate and hydrochloricarried as starting materials.Li4Ti5O12-PAn composite was characterized by X-ray diffractometry(XRD),infrared spectrum(IR)combined with electrochemical tests.The results show that the electrical conductivity is enhanced obviously due to the introduction of PAn to Li4Ti5O12.Li4Ti5O12-PAn composite exhibits better high-rate capability and cyclability than Li4Ti5O12.The composite can deliver a specific capacity of 191.3 and 148.9 mA·h/g,only 0.13%and 0.61%of the capacity is lose after being discharged 80 times at 0.1C and 2.0C,respectively.
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