Method for preparing active conducting polymer hydrogel with oxidoreduction function
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A technology of conductive polymers and hydrogels, applied in circuits, capacitors, electrical components, etc., can solve the problems of high specific capacity due to conductivity, and achieve the effects of maintaining cycle stability, increasing specific capacitance, and simple equipment
Inactive Publication Date: 2013-09-25
HOHAI UNIV
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Conductive polymer composite hydrogels have improved mechanical strength due to the introduction of a large amount of polystyrene sulfonate and polymers, but the rapid attenuation of electrical conductivity makes it impossible to obtain high specific capacity when used as supercapacitor electrode materials
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Embodiment 1
[0030] Example 1 A method for preparing PEDOT hydrogel with redox activity, the steps are as follows:
[0031] (1) 0.013g (1.3g / L, that is 4mmol / L) K 3 Fe(CN) 6 (Purchased from Sinopharm Chemical Reagent Co., Ltd.) was added to 10 mL of water, stirred and dispersed by ultrasonic to dissolve.
[0032] (2) Add 0.412g (41.2g / L, ie 0.2mol / L) of sodium polystyrene sulfonate (purchased from Aldrich, Germany) into 10mL of water, stir and use ultrasonic dispersion to form a dispersion and then follow step (1) The resulting solution is mixed, stirred and ultrasonically dispersed to form a dispersion.
[0033] (3) Add 0.853g (6mmol) of 3,4-ethylenedioxythiophene monomer (purchased from Suzhou Bohong Chemical Technology Co., Ltd.) into the dispersion formed in step (2) above, stir and use ultrasonic dispersion for 30 minutes, Evenly dispersed
[0034] (4) Add 12.12gFe(NO 3 ) 3 ·9H 2 O (ferric nitrate nonahydrate, 30 mmol, purchased from Sinopharm Chemical Reagent Co., Ltd.) was dissolved in 5 m...
Embodiment 2
[0035] Example 2. A method for preparing PEDOT hydrogel with redox activity. The difference from Example 1 is that in step (1), K 3 Fe(CN) 6 The mass becomes 0.033g (3.3g / L, ie 10mmol / L), 12.12gFe(NO 3 ) 3 ·9H 2 O becomes 3.24gFeCl 3 .6H 2 O (12mmol, ferric chloride hexahydrate), stand for 24h to 18h. The prepared PEDOT hydrogel has a sheet size of 100-400nm and a specific capacitance of 168F / g.
Embodiment 3
[0036] Example 3. A method for preparing PEDOT hydrogel with redox activity. The difference from Example 1 is that the 3,4-ethylenedioxythiophene monomer is changed to 0.284g (2mmol), and 12.12gFe in step (4) (NO 3 ) 3 ·9H 2 O becomes 4.39gCe(NH 4 ) 2 (NO 3 ) 6 (8mmol, cerium ammonium nitrate), the purification equilibration time from 2 days to 4 days. The size of the prepared PEDOT hydrogel is 500-800nm, and the specific capacitance is 67F / g.
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Abstract
A method for preparing active conducting polymer hydrogel with an oxidoreduction function is characterized by comprising the first step of dissolving active compounds with an oxidoreduction performance in water, and stirring and carrying out ultrasonic process to form solution with the concentration of 1-20mmol / L, wherein the solution is reserved, the second step of dissolving polystyrolsulfon acid in the water, stirring and carrying out the ultrasonic process to form dispersion liquid, mixing the dispersion liquid with the solution obtained in the first step, stirring and carrying out the ultrasonic process continuously to form dispersion liquid, the third step of adding conducting polymer monomer 3,4-aethylenum dioxo thiophene into the dispersion liquid obtained in the second step, stirring and carrying out the ultrasonic process to form a reaction system, the fourth step of dissolving an oxidizing agent in the water to form aqueous solution, adding the aqueous solution to the reaction system obtained in the third step at a time, mixing the reaction system and the aqueous solution evenly, standing the reaction system and the aqueous solution, reacting for 4-24 hours, purifying and balancing a product in distilled water for 2-6 days, freezing and drying the product, and the active conducting polymer hydrogel with the oxidoreduction function is obtained. Compared with pure conducting polymer hydrogel, the active conducting polymer hydrogel with the oxidoreduction function has higher specific capacitance and cycling stability.
Description
Technical field [0001] The invention belongs to the field of materials for supercapacitor electrodes, and specifically relates to a method for preparing a conductive polymer hydrogel with redox activity. Background technique [0002] Supercapacitor is a new type of energy storage device between batteries and traditional capacitors. It has the advantages of both. It has the advantages of high power density, high energy density, short charging time, long service life and no pollution to the environment. It is widely used in many fields such as national defense, military industry, electric vehicles, computers, and mobile communications. Electrode materials are the most critical part of supercapacitors and the main factors that determine their performance. Supercapacitor electrode materials mainly include carbon materials, metal oxides, and conductive polymers. Among them, conductive polymers are easy to synthesize, environmentally friendly, and conductive. Controllable rate and oth...
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