| Li4Ti5O12-聚苯胺复合材料的合成与表征 |
| Synthesis and Characterization of Li4Ti5O12-polyaniline Composites |
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| 摘要: 以醋酸锂和钛酸四丁酯为原料，以乙醇为溶剂，采用溶胶-凝胶法制备Li4Ti5O12;以苯胺、过硫酸铵为原料，以盐酸为溶剂，采用原位聚合法合成Li4Ti5O12-聚苯胺复合材料。采用X-射线衍射、红外光谱和电化学测试等对复合材料进行了表征。结果表明，聚苯胺的加入明显提高了Li4Ti5O12的电子导电性能，Li4Ti5O12-PAn复合材料具有比Li4Ti5O12更好的高倍率性能和循环稳定性。0.1C和2.0C放电时Li4Ti5O12-PAn的放电容量达到了191.3和148.9 mAh·g-1，经80次循环后二者平均每次循环容量衰减率分别为0.13%和0.61%。 |
| 关键词: 溶胶-凝胶法 原位聚合合成法 Li4Ti5O12 聚苯胺 锂离子电池 |
| 基金项目: |
| Abstract: Li4Ti5O12 powders were prepared by so-gel method using tetrabutyl titanate， lithium acetate and absolute alcohol as starting materials. Li4Ti5O12-polyaniline (Li4Ti5O12-PAn) composites were prepared by in situ polymerization method using aniline， ammonium persulfate and hydrochloricarried as starting materials. Li4Ti5O12-PAn composites were characterized by XRD， IR combined with electrochemical tests. Results show that the electrical conductivity is enhanced obviously due to the introduction of PAn to Li4Ti5O12. Li4Ti5O12-PAn composites exhibit better high rate capability and cyclability than Li4Ti5O12. The composites can deliver a specific capacity of 191.3 and 148.9 mAh·g-1， only 0.13% and 0.61% of the capacity is lost after discharged for 80 times at 0.1C and 2.0C， respectively. |
| Keywords: sol-gel method in situ polymerization method Li4Ti5O12 polyaniline lithium ion batteries |
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| 摘要点击次数: 1556 |
| 全文下载次数: 1992 |
| 何则强,熊利芝,陈 上,吴显明,刘文萍,黄可龙.Li4Ti5O12-聚苯胺复合材料的合成与表征[J].无机化学学报,2007,23(8):1382-1386. |
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