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›› 2013, Vol. 13 ›› Issue (5): 889-892.

• 材料工程专栏 • 上一篇    下一篇

微波水热法合成Li4Ti5O12及其性能

章守权 陈春华   

  1. 中国科学技术大学材料科学与工程系
  • 收稿日期:2013-05-27 修回日期:2013-07-29 出版日期:2013-10-20 发布日期:2013-10-20

Synthesis and Characterization of Li4Ti5O12 Prepared by Microwave Hydrothermal Method

ZHANG Shou-quan CHEN Chun-hua   

  1. Department of Materials Science and Engineering, University of Science and Technology of China
  • Received:2013-05-27 Revised:2013-07-29 Online:2013-10-20 Published:2013-10-20

摘要: 采用微波水热法和水热法制备锂离子电池负极材料Li4Ti5O12,比较了合成方法对Li4Ti5O12电化学性能的影响,考察了其结构和形貌及电化学性能. 结果表明,两种方法均合成了尖晶石结构的Li4Ti5O12,微波水热法合成的样品电化学性能较好,颗粒尺寸为200~300 nm,分布均匀,比表面积较大,在1 C的放电条件下,首次放电比容量为151.33 mA×h/g,97次循环后放电比容量为140.94 mA×h/g,保持率为93.14%,且电化学阻抗较小.

关键词: 锂离子电池, 水热法, 微波水热法, Li4Ti5O12

Abstract: Lithium titanate Li4Ti5O12 as lithium ion battery cathode material was synthesized using hydrothermal and microwave hydrothermal methods, the influences of different methods on its electrochemical performance were examined, and its structure, morphology, constant current charge and discharge characterized. The results showed that Li4Ti5O12 could be synthesized by both methods, the latter could lead to better electrochemical properties of the sample in smaller and more uniform particle size and larger specific surface area, the first discharge capacity of 151.33 mA×h/g after 97 cycles was 140.94 mA×h/g, the capacity retention rate 93.14%, and the chemical impedance smaller.

Key words: lithium ion battery, hydrothermal method, microwave hydrothermal method, Li4Ti5O12

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