化学学报 ›› 1995, Vol. 53 ›› Issue (7): 677-682. 上一篇    下一篇

研究论文

锂/聚噻吩体系的动力学模型

刘平;吴浩青   

  1. 复旦大学化学系
  • 出版日期:1995-07-15 发布日期:1995-07-15

Kinetics model of Li/polythiophene system

LIU PING;WU HAOQING   

  • Online:1995-07-15 Published:1995-07-15

本文运用STM及SEM确定处理固相离子传导的基体形状为球形; 用改进的GITT方法(间隙库仑滴定法)计算了离子的扩散系数, 在10^-^1^0~10^-^1^2cm^2.s^-^1量级; 运用XPS方法证明了界面的部分电荷转移。建立了阴离子(ClO~4^-)在导电聚合物(聚噻吩)中的电化学嵌入反应的动力学表达式。将上述模型应用于ClO~4^-在聚噻吩(PT)中的嵌入反应。所得结果表明, 在脱嵌态聚噻吩的交换电流很小, 与它的半导体性质一致。同时, α+β<1, 再次证明了界面的部分电荷转移。

关键词: 动力学, 高聚物, 扩散, 锂, 噻吩, 模型, 嵌入反应

With STM and SEM, spherical partical electrode model was established for solving solid state ionic diffusion problem. A modified GITT method was introduced to estimate D to be 10^-^1^0 to 10^-^1^1cm^2.s^-^1. A partial charge ransfer across the interface was determined with XPS study and a kinetic equation was given. The model was applied to ClO~4^- intercalation into polythiophene. Coincide with the semiconductor property, the exchange current of deintercalated polythiophene was very low while α+β<1. It further proved the partial charge transfer model.

Key words: DYNAMICS, HIGHPOLYMER, DIFFUSION, LITHIUM, THIOPHENE, MODELS, INTERCALATION REACTION

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