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Preparation method for electroactive polypyrrole film

A polypyrrole film and pyrrole film technology, which is applied in the electrolytic process, electrolytic components, electrolytic organic production, etc., can solve the problems of reducing electroactivity, polymer peroxidation, increasing response voltage, etc., achieving easy control and few influencing factors. , good reproducibility

Active Publication Date: 2012-12-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, as the polymerization time increases, the internal resistance of the membrane increases, and its response voltage will increase accordingly, which will easily cause the polymer to peroxidize, thereby reducing its electrical activity.

Method used

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  • Preparation method for electroactive polypyrrole film
  • Preparation method for electroactive polypyrrole film
  • Preparation method for electroactive polypyrrole film

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[0031] Implement a kind of preparation method of electroactive polypyrrole membrane, specifically comprise electrochemical unipolar pulse method, and its described preparation method is carried out by following steps:

[0032] Step 1, dissolving a certain amount of pyrrole monomer in water to form an aqueous phase solution A with a pyrrole concentration of 0.06-0.6 mol / L;

[0033] Step 2, dissolving a certain amount of electrolyte in water to form an aqueous solution B with an electrolyte concentration of 1.2 to 3 mol / L, wherein the electrolyte is one of potassium chloride, potassium sulfate, potassium nitrate and potassium perchlorate, wherein The performance of the polypyrrole membrane prepared with potassium chloride as the electrolyte solution is the best;

[0034] Step 3, a certain quality of inorganic acid solution is dissolved in water to form a hydrogen ion concentration of 0.3 ~ 3 mol / L aqueous solution C, its inorganic acid is a kind of hydrochloric acid, sulfuric ac...

Embodiment 1

[0043] (1) 2.0538 g pyrrole monomer is dissolved in the aqueous solution of 100 ml and is mixed with the pyrrole aqueous solution A of 0.3 mol / L;

[0044] (2) Dissolve 8.9849 g potassium chloride in the aqueous solution of 100 ml and be mixed with the potassium chloride aqueous solution B of 1.2 mol / L;

[0045] (3) 2.9200 g concentrated hydrochloric acid is dissolved in the aqueous solution of 100 ml and is mixed with the hydrochloric acid solution C of 0.3 mol / L;

[0046] (4) Put 10 ml of solution A, solution B and solution C into the reaction vessel and stir evenly;

[0047] (5) Using a three-electrode system (the working electrode has an effective area of ​​0.5 cm 2 Platinum sheet, the counter electrode is a platinum sheet, and the reference electrode is a saturated calomel electrode), the temperature of the reactor is controlled at 10 °C, and the single-stage pulse signals are set as follows: the pulse potential is 0.7 V, the pulse on-off time ratio is 10 ms / 100 ms; th...

Embodiment 2

[0051] (1) 1.0269 g pyrrole monomer is dissolved in the aqueous solution of 100 ml and is mixed with the pyrrole aqueous solution A of 0.15 mol / L;

[0052] (2) 11.2311 g potassium chloride is dissolved in the aqueous solution of 100 ml and is mixed with potassium chloride aqueous solution B of 1.5 mol / L;

[0053] (3) 2.92 g concentrated hydrochloric acid is dissolved in the aqueous solution of 100 ml and is mixed with the hydrochloric acid solution C of 0.3 mol / L;

[0054] (4) Put 10 ml of solution A, solution B and solution C into the reaction vessel and stir evenly;

[0055] (5) Using a three-electrode system (the working electrode has an effective area of ​​1 cm 2 carbon paper, the counter electrode is gold, the reference electrode is a saturated calomel electrode), the temperature of the reactor is controlled at 5 ℃, and the single-stage pulse signals are set as follows: the pulse potential is 0.7 V, and the pulse on-off time ratio is 20 ms / 200 ms; the number of pulses...

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Abstract

The invention discloses a preparation method for an electroactive polypyrrole film. The preparation method comprises the following steps of: preparing an aqueous solution of single pyrrole, an electrolyte solution and a protonic acid solution; secondly, mixing the three solutions; and obtaining a polypyrrole film electrode material on a conducting substrate by using a unipolar pulse electric polymerization. According to the preparation method disclosed by the invention, the operation is simple; products are easily obtained; no oxidant is needed; and the secondary pollution caused by the oxidant is avoided. The polypyrrole film electrode material prepared by the method in a neural solution has higher discharging stability.

Description

technical field [0001] The invention relates to a preparation method of an electroactive polypyrrole membrane, in particular to a preparation method for synthesizing a high-stability polypyrrole membrane electrode material by using a unipolar pulse electropolymerization method. Background technique [0002] Polypyrrole (PPy), as a widely studied conductive polymer, has high application prospects in supercapacitor materials due to its high pseudocapacitance and good environmental stability. However, there are still some problems in the practical application of polypyrrole in supercapacitors. The main performance is that in the process of reversible charge and discharge, the continuous insertion and migration of ions will change its structure and microscopic morphology, thereby significantly reducing its stability. sex. [0003] The existing polypyrrole synthesis methods mainly include chemical oxidation polymerization and electrochemical oxidation polymerization. The chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/02C25B3/23
Inventor 郝晓刚杜晓韩念琛官国清王忠德张忠林刘世斌马旭莉
Owner TAIYUAN UNIV OF TECH
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