物理化学学报 >> 2008, Vol. 24 >> Issue (09): 1563-1567.doi: 10.3866/PKU.WHXB20080906

研究论文 上一篇    下一篇

喷墨打印制备LiMn2O4薄膜电极及其电化学性能

黄俊杰; 江志裕   

  1. 复旦大学化学系, 上海分子催化与新材料重点实验室, 上海 200433
  • 收稿日期:2008-01-30 修回日期:2008-05-09 发布日期:2008-09-10
  • 通讯作者: 江志裕 E-mail:zyjiang@fudan.ac.cn

Electrochemical Performance of LiMn2O4 Thin Film Electrode Fabricated by Ink-Jet Printing Technique

HUANG Jun-Jie; JIANG Zhi-Yu   

  1. Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • Received:2008-01-30 Revised:2008-05-09 Published:2008-09-10
  • Contact: JIANG Zhi-Yu E-mail:zyjiang@fudan.ac.cn

摘要: 通过溶胶-凝胶法制备了尖晶石LiMn2O4. 用分散剂Lormar D, 经超声分散制得了含LiMn2O4粒子的打印“墨水”, 并使用计算机喷墨打印的方法制得LiMn2O4薄膜电极. 薄膜电极的厚度约为1.8 μm. 用XRD、TG-DTA、SEM、循环伏安、电化学阻抗谱和充放电等方法对材料和电极的性能进行了表征. 结果表明, 在较大电流100 μA·cm-2 (2C)的充放电情况下, 电极能保持好的稳定性,其首次放电容量为109 mAh·g-1, 充放电54次后, 其容量仍可保持97.4%, 为105 mAh·g-1, 这可归因于薄膜电极中尖晶石LiMn2O4的晶型完整, LiMn2O4粒子小以及稳定的超薄电极结构.

关键词: 纳米LiMn2O4, 喷墨打印, 薄膜电极, 锂离子电池

Abstract: Under ultrasonic andusingthe additive LomarDas dispersant, the printing“ink”can be prepared with LiMn2O4, which was synthesized through a sol-gel method. Through an ink-jet printing process, thin film LiMn2O4 electrode with thickness of about 1.8 μm was fabricated successfully. XRD, TG-DTA, SEM, electrochemical impedance spectrum, CV, and charge/discharge tests were used to characterize the LiMn2O4 nano particles and LiMn2O4 thin film electrode. It was found that LiMn2O4 filmelectrode could be charge-discharged at relative high current rate and kept stable. At the current density of 100 μA·cm-2 (2C), the thin film LiMn2O4 electrode had an initial capacity of 109 mAh·g-1, after 54 cycles the discharge capacity remained 97.4%, as a value of 105 mAh·g-1. This good electrochemical behavior of LiMn2O4 thin filmelectrode was mainly due to the thin thickness of electrode and well-crystallized LiMn2O4 nano particles.

Key words: LiMn2O4 nano-particle, Ink-jet printing technique, Thin filmelectrode, Lithiumion battery

MSC2000: 

  • O646