P-type doped poly (3,4-ethylene dioxy thiophen ), preparation thereof and use

Abstract

The invention relates to poly (3, 4-ethylenedioxy thiophene) conductive polymer, which is p-type doped polymer prepared by electropolymerization of 3, 4-ethylenedioxy thiophene monomer, adoption of 1-methyl-3-butyl imidazole tetrafluoborate as electrolyte and dopant, and utilization of the potentiostatic method. The structure of the poly (3, 4-ethylenedioxy thiophene) conductive polymer is a porous structure the surface of which is formed by accumulation of a plurality of particles between 800 nanometers and about 2 micrometer. The specific capacitance of the poly (3, 4-ethylenedioxy thiophene) conductive polymer reaches 113 to 158 F / g, and the cyclical stability can reach 70000 times. The invention discloses a method for manufacturing the same.

Description

technical field [0001] The invention relates to poly(3,4-ethylenedioxythiophene), its synthesis method and its application in supercapacitor electrode materials. Background technique [0002] With the rapid growth of population and the rapid development of social economy, the gradual shortage of resources and energy, and the deteriorating ecological environment, human beings will rely more on clean and renewable new energy. In recent years, the demand for higher power density in many energy storage device applications has exceeded the standard design capabilities of current state-of-the-art batteries. Generally, in addition to requiring low cost and long life, it is more desirable to have a higher energy density per unit weight or unit volume (Wh / kg) or a maximum power density (W / kg). Electrochemical capacitors (EC), especially supercapacitors (ultracapacitors), have unique advantages in terms of power characteristics. Although their energy density is lower than that of re...

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Problems solved by technology

At present, the research work on it as an electrolyte has been carried out for nearly ten years, and good results have been obtained [see (a) Ue M, Takeda M, etc, Electrochemical and Solid-State Letters, 5 (2002), A119; ( b) Ue M, Takeda M, etc, J Electrochem Soc, 150 (2003), A499; (c) Stenger-Smith JD, Webber CK, Anderson N, etc, J Electrochem Soc, 149 (2002), A973; (d) Balducci A, Bardi U, Caporali S, etc, ElectrochemCommun, 6 (2004), 566] but because electrochemical capacitors require high-purity ionic liquids, and high-purity ionic liquids are currently more expensive, thus limiting the use of ionic liquids Wide application of capacitor electrolyte

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