Preparation method of composite electrode material and product thereof

A composite electrode and electrode sheet technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of high production cost, difficulty in large-scale production, complex process, etc., and achieve low cost, simplified preparation process, The effect of simple production process

Active Publication Date: 2021-06-04
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when carbon materials are combined with conductive polymers, the electrochemical deposition method is mostly used, and the process is complicated and the production cost is high, so it is difficult to be used in large-scale production.

Method used

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  • Preparation method of composite electrode material and product thereof
  • Preparation method of composite electrode material and product thereof
  • Preparation method of composite electrode material and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, the preparation method of carbon dot / conductive polymer composite electrode material

[0036] plan 1:

[0037] (1) Synthesis of carbon dots: Dissolve urea and citric acid in water at a mass ratio of 1:1.5, with a solid-liquid ratio of 10, and then hydrothermally synthesize carbon dots; the temperature of hydrothermal synthesis is 180°C, and the time is 8h;

[0038](2) Carbon dot activation: Mix the carbon dots prepared in step (1) with KOH at a mass ratio of 2:1, heat and activate in an argon atmosphere, and the heating rate is 2°C / min, and the temperature is raised to 600°C Keep it warm for 2 hours, and finally cool to room temperature. After carbonization, the crude product is obtained, and further washed with 0.3% dilute hydrochloric acid solution and water to neutrality;

[0039] (3) Soak the activated carbon dots in step (2) in 50 mg / mL of FeCl 3 Ethanol solution for 5 minutes, filtered out and dried;

[0040] (4) The product of step (3) is placed ...

Embodiment 2

[0087] Embodiment 2, the electrode tablet of preparation capacitor constitutes electrode system

[0088] Activated carbon / conductive polymer composite electrode material, conductive agent Super P and binder polytetrafluoroethylene solution (solid content 60wt%) were dispersed in absolute ethanol with a mass ratio of 8:1:1 and fully ground to obtain Viscous slurry; then evenly scrape the slurry onto a square nickel foam current collector with a side length of 1cm, take it out after air-drying at 80°C overnight, and then place it on a powder tablet press with a pressure of 2MPa Press the sheet for 15s to prepare the electrode sheet of the capacitor.

[0089] Under the three-electrode system, the electrode sheet is used as the working electrode, the Pt sheet is used as the counter electrode, and the Hg / HgO electrode is used as the reference electrode. / s Electrochemical tests at different scan speeds.

[0090] figure 1 The composite electrode material prepared by the hydrother...

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Abstract

The invention discloses a preparation method of a composite electrode material and a product thereof, and the specific preparation method comprises the following steps: preparing carbon dots from a compound containing at least one element of nitrogen, boron, phosphorus and sulfur and citric acid, then carbonizing under an alkali-containing condition to form a porous carbon dot material, washing the formed porous carbon dot material to be neutral, further soaking with a solution containing a polymerization initiator, drying, and carrying out gas-phase polymerization with a conductive polymer monomer to obtain a carbon dot/conductive polymer composite electrode material; the preparation method is simple and low in cost; the prepared composite material has excellent structure and performance, shows excellent electrochemical energy storage performance when being used as a supercapacitor electrode material, and has a wide application prospect in the field of preparation of cheap, environment-friendly and high-performance supercapacitors.

Description

technical field [0001] The invention relates to the field of energy storage materials, in particular to a method for preparing a composite electrode material, and to products made from the material. Background technique [0002] Supercapacitors have been widely used and valued in many fields such as new energy vehicles, solar power generation, and portable electronic devices due to their superior performance such as high power density, short charge and discharge time, long cycle life, and environmental protection. According to different energy storage mechanisms, supercapacitors can be divided into electric double layer capacitors, faraday pseudocapacitors and hybrid supercapacitors with both. The selection of suitable electrode materials is the key to fabricate capacitors with excellent performance. At present, the active materials used to prepare supercapacitor electrodes are mainly carbon-based materials, transition metal oxides, and conductive polymers. [0003] Conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/34H01G11/86
CPCH01G11/30H01G11/34H01G11/86Y02E60/13
Inventor 陈久存王兰馨金燕子
Owner SOUTHWEST UNIVERSITY
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