The Synthesis And Electrochemical Behavior Of 3, 4-ethylenedioxythiophene

The article discussed the development history,performance,the synthesis and future application of poly(3,4-ethylenedioxythiophene)(Its simplified name is PEDT).Its monomer is 3,4-ethylenedioxythiophene(EDT)poly(3,4-ethylenedioxythiophene)(PEDT) is one of conducting polymers. It doped poly(styrene sulfonic acid)(PSS) to yield PEDT/PSS films with high conductivity(10s/cm),high visible light transmission and excellent stability.The polymer has been able to develop successful the application of solid electrolyte capacitors and antistatic coating on plastics. Other application are through-hole plating of printed circuit boards,photodiodes,rechargeable batteries,sensors and etc. The expensive price limits its application. So it is significant to reduce the cost and improve the synthetic way. The synthesis methods and electrochemical performance of the single EDT are discussed in the article. The synthesis methods of EDT with five steps have been used HOOCCH2—S—CH2COOH as original material. Through a large amount of experiments, improving the productivity of intermedia of EDT by improving the craft of dehydrating and selecting the suitable catalyst, the synthetic technology has been improved. In the last step of synthesis, it is reports that the reacting temperature is reduced by adopting the high boiling point solvents and selecting the suitable catalyst. The ending productivity of EDT is higher than the level reported of literature. Among whole research, the products are proved by FT-IR and CHN element analysis instrument and NMR. The electrochemical performance of EDT is researched with Cyclic Voltammetry, the result is that EDT product has very good electrochemical activation.