化学学报 ›› 1994, Vol. 52 ›› Issue (8): 774-778. 上一篇    下一篇

研究论文

Li/CDMO电池及其放电机理研究

余爱水;吴浩青   

  1. 复旦大学化学系
  • 出版日期:1994-08-15 发布日期:1994-08-15

Discharge mechanism of Li/CDMO battery

YU AISHUI;WU HAOQING   

  • Online:1994-08-15 Published:1994-08-15

研究了Li/CDMO电池的放电反应机理、XRD、XPS等实验结果表明, 电池反应是锂在正极内的电化学嵌入反应。用恒电流间隙滴定法(GITT)测得锂在正极中的扩散速率为10^-9cm^2.s^-1量级, 与锂在层状化合物中的扩散速率相当, 结合Li/CDMO电池的热力学行为, Li/CDMO电池的放电反应历程是锂首先客居于层状结构的Li~2MnO~3中, 然后再通过热弛豫进入γ-β-MnO~2的晶格。

关键词: 俄歇电子谱法, X射线衍射分析, 氧化锰, X射线光电子谱法, 锂, 放电机理, 锰酸锂, 电池反应

The discharge mechanism was studied by x-ray diffraction, XPS, and electrochem. methods. The chem. diffusion coefficient of Li in the oxide cathode was determine by constant current intermittent titration method to be ~10-9 cm2/s. The mechanism involves intercalation of Li into layer structure of Li2MnO3 followed by thermal relaxation into g-b-MnO2 lattice.

Key words: AUGER ELECTRON SPECTROMETRY, X-RAY DIFFRACTION ANALYSIS, MANGANESE OXIDE, X-RAY PHOTOELECTRON SPECTROMETRY, LITHIUM, LITHIUM MANGANATE

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