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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (9): 819-826. 上一篇    下一篇

研究论文

锂离子电池电极用规整中孔碳分子筛的电化学特性

邢伟1 2，张颖1，阎子峰*1，逯高清2   

  1. (1中国石油大学重质油国家重点实验室 CNPC催化重点实验室 东营 257061)
    (2 The Nanomaterials Centre, School of Engineering, University of Queensland, Brisbane 4072, Australia)
  • 投稿日期:2004-03-11 修回日期:2005-01-07 发布日期:2010-12-10
  • 通讯作者: 阎子峰

Electrochemical Characteristics of Ordered Mesoporous Carbon Used as Electrode Material in Li-ion Battery

XING Wei1,2, ZHANG Ying1, YAN Zi-Feng*1, LU Gao-Qing2   

  1. (1 State Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, China Universtiy of Petroleum, Dongying 257061, China)
    (2 The Nanomaterials Centre, School of Engineering, University of Queensland, Brisbane 4072, Australia)
  • Received:2004-03-11 Revised:2005-01-07 Published:2010-12-10
  • Contact: YAN Zi-Feng

PDF

1311

被引次数

22

采用SEM, N2吸附技术和XRD对首次用于锂离子电池电极的规整中孔碳分子筛CMK-5的表面形态、孔结构和晶体结构进行了表征. 利用恒电流仪和伏安循环法研究了CMK-5的电化学性质, 并与传统的阳极材料石墨进行对比. 结果表明, CMK-5具有良好的可逆特性, 在第三次充电-放电循环中贮能密度仍可达525 mAh/g, 由于CMK-5具有特殊的中孔结构, 因而更适合用作快速充电-放电循环材料. 一个有趣的现象是, CMK-5在伏安循环的正值部分没有出现极值, 这与传统阳极材料显著不同. 另外, 还利用XPS和XRD考察了CMK-5的充电-放电特性.

关键词: 中孔碳分子筛, 阳极材料, 锂离子电池, SEI膜

Ordered mesoporous carbon CMK-5 was comprehensively tested for the first time as electrode materials in lithium ion battery. The surface morphology, pore structure and crystal structure were investigated by Scanning Electronic Microscopy (SEM), N2 adsorption technique and X-ray diffraction (XRD) respectively. Electrochemical properties of CMK-5 were studied by galvanostatic cycling and cyclic voltammetry, and compared with conventional anode material graphite. Results showed that the reversible capacity of CMK-5 was 525 mAh/g at the third charge-discharge cycle and that CMK-5 was more compatible for quick charge-discharge cycling because of its special mesoporous structure. Of special interest was that the CMK-5 gave no peak on its positive sweep of the cyclic voltammetry, which was different from all the other known anode materials. Besides, X-ray photoelectron spectroscopy (XPS) and XRD were also applied to investigate the charge-discharge characteristics of CMK-5.

Key words: mesoporous carbon, anode material, lithium-ion battery, SEI film