- 作者: 王正忠 ; 陳壽南 ; 陳英忠
- 作者服務機構: 成功大學化學系
- 中文摘要: Cells of lithium/polyacetylene containing 0.5-1.5M LiClO/sub 4/ in propylene carbonate as supporting electrolyte are constructed. The mechanism for electrochemical redox process of polyacetylene is studied using cyclic voltammetry in the potential range from -0.8 to 0.2 volt vs. S.C.E. The electrode reactions are identified to be diffusion controlled. The difference of the peak potentials between the oxidation and reduction,.DELTA.Ep, is found to be a function of the scan time per cycle (.tau. sec/cycle) and is influenced by concentration of supporting electrolyte and isomeric structures of polyacetylene. However, there is a better reversible redox process of polyacetylene when the ClO/sub 4//sup -1/-ions diffuse successfully in and out of the polymer film, which has the cis-form structure, in concentrated supporting electrolyte solution and having a long scan time per cycle (.tau.). When the scan potential is extended to a more positive region, another peak is found, which may correspond to the irreversible chemical reaction caused by over-doping. The over-doping process is found to be controlled by the electrical field strength, concentration of the supporting electrolyte and isomerism of polyacetylene.
- 英文摘要: --
- 中文關鍵字: Polyacetylene; Isomerism; Isomerization; Doping; Diffusion Control
- 英文關鍵字: 聚乙炔;異構;異構化;摻雜質;擴散控制