In situ polymerization preparation and characterization of Li₄Ti₅O₁₂-polyaniline anode material

来源期刊：中国有色金属学报(英文版)2010年增刊第1期

论文作者：何则强 熊利芝 陈上 吴显明 刘文萍 黄可龙

文章页码：262 - 266

Key words：Li₄Ti₅O₁₂; polyaniline; in situ polymerization method; lithium ion batteries

Abstract: 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.

基金信息：National Natural Science Foundation of China
the Postdoctoral Science Foundation of China
Hunan Provincial Natural Science Foundation of China
the Scientific Research Fund of Hunan Provincial Education Department
Postdoctoral Science Foundation of Central South University