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Functionalized polydopamine derived carbon layer coated carbon substrate preparation method and application

A technology of polydopamine and coated carbon, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrical components, battery electrodes, etc., can solve the problem of inability to achieve uniform loading of high active materials, full exposure of electrochemical active sites, poor structural stability, Problems such as agglomeration and shedding, to achieve excellent electrochemical activity, stable structure, and low cost

Inactive Publication Date: 2017-01-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the highly active materials commonly used in supercapacitors are mainly metal hydroxides, metal oxides, etc., but due to their poor conductivity and poor structural stability, they are prone to agglomeration and shedding under high power density. The way to improve the stability of metal hydroxides and metal oxides in technology is mainly to load them on various substrates, but due to the inherent defects of various substrates, it is not possible to achieve uniform loading and electrical stability of highly active materials. Adequate exposure of chemically active sites

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  • Functionalized polydopamine derived carbon layer coated carbon substrate preparation method and application
  • Functionalized polydopamine derived carbon layer coated carbon substrate preparation method and application
  • Functionalized polydopamine derived carbon layer coated carbon substrate preparation method and application

Examples

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Embodiment 1

[0019] Weigh 200 mg of Tris, add it to 100 mL of deionized water, and then dropwise add dilute hydrochloric acid with a concentration of 0.1 mol / L to adjust the pH to 8.5. After stirring for 16 min, immerse the carbon cloth into the solution, then add 200 mg of dopamine hydrochloride was reacted at room temperature for 12 hours to obtain polydopamine-coated carbon cloth; then the obtained polydopamine-coated carbon cloth was carbonized at high temperature under nitrogen protection, and the temperature was increased from room temperature at a heating rate of 5 °C / min. The temperature was raised to 800°C, kept at a constant temperature for 120 min, and cooled to room temperature to obtain a polydopamine-derived carbon layer-coated carbon cloth; and then immersed the obtained polydopamine-derived carbon layer-coated carbon cloth into 80 mL of a bimetallic salt solution, in which hexahydrate The concentration of nickel nitrate is 0.03mol / L, the concentration of cobalt nitrate hexah...

Embodiment 2

[0021] Weigh 180 mg of Tris, add it to 60 mL of deionized water, add 0.1 mol / L of dilute hydrochloric acid dropwise to adjust the pH to 8.5, stir for 18 min, and immerse the carbon cloth into the solution, then add 180 mg of Dopamine hydrochloride was reacted at room temperature for 24 hours to obtain polydopamine-coated carbon cloth; then the obtained polydopamine-coated carbon cloth was carbonized at high temperature under nitrogen protection, and the temperature increased from room temperature to 10 °C / min. 700 ° C, constant temperature for 90 min, and cooling to room temperature to obtain polydopamine-derived carbon layer-coated carbon cloth. Then, the obtained polydopamine-derived carbon layer-coated carbon cloth was dipped into 60 mL of a bimetallic salt solution, wherein the concentration of nickel nitrate hexahydrate was 0.02 mol / L, and the concentration of cobalt nitrate hexahydrate was 0.01 mol / L. The concentration of cetyltrimethylammonium bromide was 0.03 mol / L, th...

Embodiment 3

[0023] Weigh 350 mg of tris, add it to 140 mL of deionized water, then add 0.1 mol / L of dilute hydrochloric acid dropwise to adjust the pH to 8.5, stir for 30 min, and immerse the graphite paper into the solution, then add 280 mg of Dopamine hydrochloride was reacted at room temperature for 36 hours to obtain polydopamine-coated graphite paper; then the obtained polydopamine-coated graphite paper was carbonized at high temperature under argon protection, and the temperature was increased from room temperature at a heating rate of 8 °C / min. to 900° C., constant temperature for 90 min, and cooling to room temperature to obtain polydopamine-derived carbon layer-coated graphite paper. The obtained polydopamine-derived carbon layer-coated graphite paper was then dipped into 70 mL of a bimetallic salt solution, wherein the concentration of nickel nitrate hexahydrate was 0.04 mol / L, and the concentration of cobalt nitrate hexahydrate was 0.02 mol / L. The concentration of cetyltrimethy...

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Abstract

The invention relates to the technical field of preparation of nanometer materials, and discloses a functionalized polydopamine derived carbon layer coated carbon substrate preparation method and application. The preparation method comprises the following steps: 1) immersing a carbon substrate into a trihydroxymethyl aminomethane aqueous solution, the pH value of which is adjusted to be alkaline, and then, reacting with dopamine hydrochloride to obtain a polydopamine coated carbon substrate; 2) carrying out high-temperature carbonization on the obtained polydopamine coated carbon substrate to obtain a polydopamine derived carbon layer coated carbon substrate; and 3) enabling the obtained polydopamine derived carbon layer coated carbon substrate to react with a bimetallic saline solution to obtain a functionalized polydopamine derived carbon layer coated carbon substrate. The functionalized polydopamine derived carbon layer coated carbon substrate is stable in structure, is high in electrochemical activity, and has a series of advantages of high specific capacitance and good rate capability and the like when serving as the electrode material of a super capacitor; and the preparation method thereof is simple and easy to operate.

Description

technical field [0001] The invention relates to a preparation method and application of a functionalized polydopamine-derived carbon layer-coated carbon substrate, and belongs to the technical field of nanomaterial preparation. Background technique [0002] Biomimetic synthesis is an effective method to prepare functional materials that people have been exploring. In 2007, PhillipB. Messersmith et al. found that 3,4-dihydroxy-L-phenylalanine mainly interacts with the surface of the substrate after analyzing the strong adhesion of mussel adhesion proteins on the wet substrate surface. (DOPA) and lysine-rich protein components. Inspired by this, they proposed a surface chemistry method based on small molecule dopamine with similar structures to functionally coat various organic and inorganic substrates (Science, 2007, 5849, p. 426). As a DOPA analog, dopamine itself is an important neurotransmitter in the mammalian nervous system. It can self-oxidize and polymerize in an alk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/86H01M4/583H01M4/62
CPCH01G11/32H01G11/86H01M4/583H01M4/625Y02E60/10Y02E60/13
Inventor 邱介山李少锋于畅杨卷刘志斌
Owner DALIAN UNIV OF TECH
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