Polydopamine-coated MoS2-porous carbon supercapacitor material and preparation method thereof

A supercapacitor and polydopamine technology, which is applied in the manufacture of hybrid/electric double layer capacitors and hybrid capacitor electrodes, can solve the problems of reducing the electronic conductivity of capacitor materials, expensive precious metal materials, and low concentration of conductive ions. The effect of electron transport, promotion of transport and diffusion, and excellent electrical conductivity

Active Publication Date: 2020-01-10
江西高信前沿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But at present, the metal oxide electrode supercapacitor RuO 2 Such precious metal materials are expensive and difficult to obtain, while MnO 2 , V 2 o 5 Such metal compounds have poor conductivity, which reduces the electronic conductivity of the capacitor material, while the polymer matrix of the organic polymer electrode supercapacitor has low conductivity and large internal resistance, resulting in a low concentration of conductive ions in the electrolyte. There is an ion-depletion effect,

Method used

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preparation example Construction

[0023] The preparation method of N / S co-doped porous carbon comprises the following steps:

[0024] (1) Add appropriate amount of absolute ethanol to the reaction flask, then add thiourea, melamine and phloroglucinol dihydrate in turn, stir until dissolved, then add distilled water, the volume ratio of distilled water to absolute ethanol is 1.5-2 : 1, slowly add ammonia solution, adjust the pH to 9-10, add poloxamer polyoxyethylene polyoxypropylene ether block copolymer to transfer the solution into the hydrothermal automatic reaction kettle, thiourea, melamine, m-benzene The mass ratio of trisphenol dihydrate to poloxamer polyoxyethylene polyoxypropylene ether block copolymer is 7-9:10-14:10-12:1, the temperature rises to 120-140°C, and the reaction is stirred at a constant speed for 15 -18h, the solution was cooled to room temperature, and the mixture was removed by centrifugation in a high-speed centrifuge, and the solid product was washed with an appropriate amount of dist...

Embodiment 1

[0030] (1) Preparation of N / S co-doped carbon precursor 1: add an appropriate amount of absolute ethanol to the reaction flask, then add thiourea, melamine and phloroglucinol dihydrate in sequence, stir until dissolved, then add distilled water, The volume ratio of distilled water to absolute ethanol is 1.5:1, slowly add ammonia solution, adjust the pH to 9, add poloxamer polyoxyethylene polyoxypropylene ether block copolymer to transfer the solution into a hydrothermal automatic reaction kettle , the mass ratio of thiourea, melamine, phloroglucinol dihydrate and poloxamer polyoxyethylene polyoxypropylene ether block copolymer is 7:1:10:1, the temperature rises to 120°C, and the reaction is stirred at a constant speed for 15h , the solution was cooled to room temperature, and the mixture was removed by centrifugation in a high-speed centrifuge. The solid product was washed with an appropriate amount of distilled water and fully dried to prepare N / S co-doped carbon precursor 1. ...

Embodiment 2

[0035] (1) Preparation of N / S co-doped carbon precursor 2: add an appropriate amount of absolute ethanol to the reaction flask, then add thiourea, melamine and phloroglucinol dihydrate in sequence, stir until dissolved, then add distilled water, The volume ratio of distilled water to absolute ethanol is 1.5:1, slowly add ammonia solution, adjust the pH to 10, add poloxamer polyoxyethylene polyoxypropylene ether block copolymer to transfer the solution into a hydrothermal automatic reaction kettle , the mass ratio of thiourea, melamine, phloroglucinol dihydrate and poloxamer polyoxyethylene polyoxypropylene ether block copolymer is 7:11:10:1, the temperature rises to 130°C, and the reaction is stirred at a constant speed for 16h , the solution was cooled to room temperature, and the mixture was removed by centrifugation in a high-speed centrifuge. The solid product was washed with an appropriate amount of distilled water and fully dried to prepare N / S co-doped carbon precursor 2...

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Abstract

The invention relates to the technical field of supercapacitors, and discloses a polydopamine-coated MoS2-porous carbon supercapacitor material and a preparation method thereof. The polydopamine-coated MoS2-porous carbon supercapacitor material comprises the following formula raw materials: N / S co-doped porous carbon, ammonium molybdate, sodium citrate, sodium sulfide nonahydrate and dopamine hydrochloride. According to the polydopamine-coated MoS2-porous carbon supercapacitor material and the preparation method thereof, the doping of N / P heteroatoms adjusts the nano-pore structure of the porous carbon to be well soaked and contacted with electrolyte, the excellent electrical conductivity promotes transport and diffusion of metal ions and electric charges. The nano-MoS2 prepared by the in-situ method is uniformly grown on the surface of the porous carbon material. Nano-MoS2 has a huge active specific surface area to perform the charge deembedding process. The Polydopamine-coated electrode material with high crosslinking degree enhances the flexibility and the tensile strength of the material and improves the rate performance and the electrochemical cycle stability of the supercapacitor.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, specifically a polydopamine-coated MoS 2 - Porous carbon supercapacitor material and its preparation method. Background technique [0002] A supercapacitor is a new type of energy storage device between a traditional capacitor and a rechargeable battery. It not only has the energy storage characteristics of a battery, but also has the characteristics of fast charge and discharge of a capacitor. The supercapacitor has the advantages of fast charging speed, long cycle life, strong discharge capacity, high energy conversion efficiency, and high power density. It is an ideal Green environmental protection power supply. [0003] Electric double layer capacitors mainly include metal oxide electrode supercapacitors, such as RuO 2 , MnO 2 、Co 2 o 3 , V 2 o 5 and other metal oxide materials, carbon electrode double-layer supercapacitors such as activated carbon fibers, carbon aerogels, car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/32H01G11/48H01G11/86
CPCH01G11/24H01G11/32H01G11/48H01G11/86Y02E60/13
Inventor 熊洪涛
Owner 江西高信前沿科技有限公司
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