519 results about "Electrochemical polymerization" patented technology

The invention belongs to the technical field of super capacitors, in particular to a super capacitor taking a polyaniline/aligned carbon nanotube compound film as an electrode and a manufacturing method thereof. The method comprises the following steps of: adsorbing a polymer monomer onto the surface of a carbon tube by adopting an electrochemical polymerization method; and performing constant-potential electro-deposition of three electrodes in an aniline-sulfuric acid electrolyte to obtain the polyaniline/aligned carbon nanotube compound film. The super capacitor constructed by using the compound film as an electrode has high specific capacity and stable circulating performance; and meanwhile, the super capacitor has high flexibility and high transparency. The invention designs a method for manufacturing a flexible, transparent and efficient super capacitor.

The invention discloses a preparation method for a graphene/ conductive polymer anode for a microbial fuel cell. The preparation method comprises the following steps: conductive polymer monomers and an aqueous suspension of graphene oxides are mixed, stirred at room temperature and subjected to ultrasonic treatment; by employing a constant voltage electroplating method, conductive polymer monomer/graphene oxide conductive composites are subjected to electrochemical polymerization and deposited on a surface of an anode; by employing a cyclic voltammetry, after situ electroreduction, a conductive polymer/electrochemical reduction graphene oxide modified anode is prepared on the electrode. The conductive polymer/electrochemical reduction graphene oxide modified anode is washed with deionized water and dried in the air at room temperature to prepare a graphene/ conductive polymer anode for a microbial fuel cell. Compared to traditional chemical modification methods, the preparation method reduces the usage of toxic reagents and cumbersome processes, lowers the preparation cost, and is easy to realize industrialization of electrode preparation. When the modified electrode is used for a cell, the electricity generation capacity of a microbial fuel cell is raised observably, and the development and application of a microbial fuel cell can be promoted.

An improved electrochemical polymer electrolyte membrane cell stack is provided that includes one or more individual fuel cell cassettes, each fuel cell cassette having at least one membrane electrode assembly, fuel flow field and oxidant flow field. Within each fuel cell cassette, each membrane electrode assembly has at least one manifold opening for the passage of reactant manifolds through the cassette, all of which are bonded about the perimeter by a sealant, and each flow field has at least one manifold opening and any manifold openings on the flow fields which do not correspond to a manifold providing reactant for distribution to such flow field is bonded about its perimeter by a sealant. Each fuel cell cassette may also contain other typical components of a electrochemical polymer electrolyte membrane cell stack, such as separator plates or coolant flow fields, which also have manifold openings which may or may not be bonded about the perimeter. The membrane electrode assembly, flow fields, and other components are encapsulated along the peripheral edges by a resin such that the entire periphery of the fuel cell cassette is encapsulated by the resin.

The invention discloses an electrically conductive polymer-graphene composite electrochromic film. A preparation method of the film comprises the following steps: with an electrochemical polymerization method, a layer of electrically conductive polymer film is deposited on an electrically conductive substrate; a graphene oxide water solution is prepared with a modified Hummers method, and a graphene film is prepared with a metal base self-assembly synchronous reduction method; and the surface of the electrically conductive polymer film is covered by the graphene film with a Czochralski method, such that the composite electrochromic film is obtained. The composite electrochromic film provided by the invention has an innovative structure and excellent performances. The preparation method is simple.

A lithium secondary battery exhibiting very high safety, which is ensured by restraining both the generation of flammable gas caused by the decomposition of an electrolyte, and the emission of oxygen from a positive active material even during overcharging. The lithium secondary battery includes a positive electrode of which an active material is a lithium transition metal composite oxide, a negative electrode of which an active material is a carbon material, and a nonaqueous electrolyte containing an organic solvent in which a lithium salt is dissolved. The nonaqueous electrolyte contains at least one kind of conductive polymer-forming monomers which have an alkyl group and is electrochemically polymerizable on the positive electrode within a battery operation voltage, and at least one kind of film-forming agents which electrochemically decompose within the battery operation voltage to form films on a surface of the negative electrode.

The invention discloses a graphene/polyaniline composite membrane based pH detecting electrode. The graphene/polyaniline composite membrane based pH detecting electrode comprises an electrode body and a graphene/polyaniline composite membrane covering the outer surface of the electrode body, wherein the electrode body is selected from one of an ITO glass electrode, a stainless steel gold plated electrode and a gold disc electrode. The invention also discloses a preparation method of the pH detecting electrode. The preparation method comprises the following steps: (1) pretreating the electrode; (2) preparing electrolyte; and (3) carrying out electrochemical polymerization. The invention also discloses an application method of the pH detecting electrode. The pH detecting electrode is used for detecting the pH of a phosphate buffer solution, oxidation peak potential acts as a detecting signal, and the pH value within the range of 1-11 can be detected. Compared with a common pH detecting electrode, the graphene/polyaniline composite membrane based pH detecting electrode is smaller in size, is lower in price, is more convenient in detection, and does not require special treatment before and after use. The compounding of graphene and polyaniline obviously improves the pH detecting effect of the electrode.

The invention discloses a conductive polyaniline polypyrrole composite membrane and a preparation method thereof. Aniline and pyrrole monomers are dissolved into an organic solvent, a supporting electrolyte is dissolved into water, thus two solutions are respectively prepared, the two solutions are transferred into a reactor in steps, so as to form a liquid-liquid interface, and a working electrode is directly inserted in the liquid-liquid interface, an auxiliary electrode and a reference electrode are placed into the supporting electrode solution, and electrochemical polymerization is carried out by electrochemical means. The polymer prepared by the method of the invention can spread out and grow on the interface, the polymerization product is proved to have good conductivity, and the polymerization product can be applied to a super capacitor, the anode material and cathode material of a battery, electromagnetic shielding and the like.

The invention relates to carbon nanotube/polypyrrole composite sponge and a preparation method thereof, belonging to the field of the synthesis and application of carbon nanocomposites. The carbon nanotube/polypyrrole composite sponge is formed through stacking and winding composite tubes with microcosmic core-shell structures and has a porous structure, wherein each composite tube consists of a carbon nanotube and a uniform-thickness polypyrrole layer coated outside the carbon nanotube. The mass content of polypyrrole in the composite sponge is controllable; the composite sponge has good elasticity, good cyclic compression stability and excellent electrochemical properties; the carbon nanotube/polypyrrole composite sponge is prepared by the method which combines a chemical vapor deposition method, an adsorption composite method and an electrochemical polymerization method; the preparation method has ingenious conception and is simple and easy in operation.

The invention relates to a preparation method for polypyrrole/polythiophene derivative compound conductive high polymer material, which comprises the following steps: firstly, boron trifluoride diethyl ether and aether are blended, and then added with ionic liquid to obtain A solution; pyrrole and thiofuran derivative monomer are added into the A solution to prepare B solution; the B solution is added into an electrolytic cell equipped with three electrodes; and electrochemical polymerization is carried out under the protection of nitrogen; polymerized current density is 1-10 mA/cm2; a layer of uniform polypyrrole/polythiophene derivative complex film can be obtained on a working electrode after polymerization is finished; the working electrode is taken out for washing and dried in the temperature of 60 DEG C. The preparation method has the beneficial effects that the composite electrode material prepared by the invention has about 200 F/g of bulking value and an electrical potential widow with about 0-2.8 width in organic solvent, and still has higher specific capacity and better circulation stability when discharging in high power.

The invention discloses a preparation and application method of a molecular imprinting electrochemical sensor. The method comprises the following steps: selecting a glassy carbon electrode as a working electrode; performing surface pretreatment on the glassy carbon electrode through a cyclic voltammetry; modifying the pretreated glassy carbon electrode with nanogold, polythionine, methacrylic acid and a salbutamol composite membrane in sequence through electrochemical polymerization; finally eluting salbutamol, so as to obtain the molecular imprinting electrochemical sensor. According to the invention, salbutamol in food is detected through a differential pulse amperometric detection method, so that an application process is accomplished. Compared with the prior art, the preparation and application method has the advantages that the response speed is high, the sensitivity is high, the recognition performance is good, a wider linearity range and a lower detection limit are provided for rapidly detecting salbutamol in food, the practicability is high, and the method is easy for popularization.

The invention relates to a preparation method for conductive polymer modification activated carbon electrode materials in a super capacitor, which comprises the following steps: conductive polymer monomers are added into ionic liquid to obtain A solution with the monomer concentration of 0.01-0.5mol/L; the A solution is added into an electrolytic cell deployed with three electrodes; ampere density of 1-10 mA /cm2 is applied to an activated carbon electrode; the electrochemical polymerization is carried out under the protection of nitrogen; after the polymerization is finished, a layer of even conduction polymer film can be obtained on an activated carbon working electrode. The preparation method has the beneficial effects that by using conductive polymer modification activated carbon electrodes, the double layer capacitance of the activated carbon not only can be used, but also the pseudo-capacitance of the conductive polymers can be used for increasing the specific capacitance of the capacitor; compared with a pure activated carbon electrode, the specific capacitance is increased by 2-3 times; and the electrode has high conductivity, fast charge and discharge capability and better circulation stability.

The invention relates to the technical field of molecularly-imprinted and electrochemical polymerization, in particular to a preparation method of a glyphosate molecularly-imprinted electrochemical sensor. The preparation method comprises the following steps that 1, gold nanoparticles are electrochemically deposited on a graphene-modified electrode to obtain a graphene-nanogold-modified electrode; 2, a molecularly-imprinted polymer is polymerized on the surface of the graphene-nanogold-modified electrode in situ through an electrochemical polymerization method to form a layer of a molecularly-imprinted film, wherein the molecularly-imprinted polymer takes pyrrole as a functional monomer and takes glyphosate as a template molecule; 3, the glyphosate template molecule is removed, and then the glyphosate molecularly-imprinted electrochemical sensor is prepared.

The invention discloses a preparation method of a polypyrrole functional mediator doped with a water-soluble anthraquinone or naphthoquinone compound and application thereof. Specifically, the preparation method comprises: (1) preparing a polymerization solution: firstly preparing a saturated solution of the water-soluble anthraquinone or naphthoquinone compound, then adding 0.33-0.67mL of pyrrole to every 100mL of the saturated solution and mixing well; (2) pretreating active carbon felt and platinum plate electrodes; (3) embedding the pretreated platinum plate electrodes in step (2) into the active carbon felt, then conducting electrochemical polymerization in the polymerization solution, with a polymerization potential of 0.30-0.50V, a polymerization time of 1-3h and a potential changerate of 0.03-0.07V/s. The polypyrrole functional mediator provided in the invention plays an accelerating role in a microorganism denitrification process, and is recyclable and free of secondary pollution.

The invention relates to a thick glue photoetching electroforming technology-based manufacture method of a three-dimensional MEMS (micro-electromechanical systems) supercapacitor. The supercapacitor has the structure of a comb tooth-shaped inserting finger. The method comprises the following steps of: on the substrate of a silicon wafer, taking SU-8 thick glue photoetching as a temperate, depositing a current collector in the template in an electroforming technology, electrically and chemically polymerizing a conducting polymer on the current collector to be taken as an active electrode material of the supercapacitor, and finally covering a layer of solid electrolyte. The supercapacitor has the three-dimensional structure, so that the superficial area of the electrode can be effectively enlarged, therefore, the energy density and the power density can be greatly improved relative to a flat plate structure. Furthermore, the safety performance of the method can be improved due to the use of solid electrolyte.

A molecular recognition sensor system is provided incorporating a molecular imprinted nanosensor device formed by the process steps of:

• • (a) fabricating using photolithography a pair of metallic electrodes separated by a microscale gap onto a first electrical insulation layer formed on a substrate;
  • (b) applying a second electrical insulation layer on most of a top surface of said pairs of electrodes;
  • (c) depositing additional metallic electrode material onto said electrode pairs using electrochemical deposition, thereby decreasing said microgap to a nano sized gap between said electrode pairs;
  • (d) electrochemically polymerizing in said nanogap conductive monomers containing a target analyte, thereby forming a conducting polymer nanojunction in the gap between electrode pairs; and
  • (e) immersing resultant sensor device in a solution which removes away the target analyte, and intermittently applying a voltage to the conducting polymer while it is immersed in said solution, thereby swelling and shrinking the conducting polymer to effect a more efficient extraction of target analyte from the conducting polymer.