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Preparation method of supercapacitor electrode material based on two-dimensional carbon nanosheets

A technology of supercapacitors and carbon nanosheets, which is applied in the fields of hybrid capacitor electrodes, carbon preparation/purification, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of slow Faraday process, poor conductivity and narrow potential window of pseudocapacitors. Achieve the effects of excellent cycle performance, high specific capacitance, and good rate performance

Active Publication Date: 2020-01-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the experimental capacitance of transition metal oxides is usually much lower than its theoretical limit because of their narrow potential window (ACS Appl. Mater. Interfaces, 2016, 8, 2562-2572) and poor electrical conductivity (Chem. Soc. Rev. ,2012,41,797-828) and the slow Faraday process of the pseudocapacitor

Method used

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  • Preparation method of supercapacitor electrode material based on two-dimensional carbon nanosheets
  • Preparation method of supercapacitor electrode material based on two-dimensional carbon nanosheets
  • Preparation method of supercapacitor electrode material based on two-dimensional carbon nanosheets

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Embodiment 1

[0024] A preparation scheme of a supercapacitor electrode material based on two-dimensional carbon nanosheets is carried out according to the following steps:

[0025] (1) Preparation of two-dimensional amorphous carbon on metallic nickel foam substrate: 3 g of starch was added to 10 mL of water, then the solution was stirred for 2 hours to form a paint-like suspension;

[0026] (2) Put metal foam nickel on a high-temperature heating plate and heat it to 400°C;

[0027] (3) 1.0ml paint-like suspension is added dropwise in the metal foam nickel, and after 10 seconds, the aqueous starch solution on the metal foam nickel base becomes sticky due to the evaporation of water;

[0028] (4) With the help of tweezers, press the back of the metal foam substrate up and gently, and finally a large number of black bubbles will be generated, which means the formation of two-dimensional amorphous carbon nanosheets;

[0029] (5) Prepare a coating on two-dimensional amorphous carbon: first, p...

Embodiment 2

[0032] A preparation scheme of a supercapacitor electrode material based on two-dimensional carbon nanosheets is carried out according to the following steps:

[0033] (1) Preparation of two-dimensional amorphous carbon on metallic nickel foam substrate: 3 g of starch was added to 10 mL of water, then the solution was stirred for 2 hours to form a paint-like suspension;

[0034] (2) Put metal foam nickel on a high-temperature heating plate and heat it to 400°C;

[0035] (3) 1.0ml paint-like suspension is added dropwise in the metal foam nickel, and after 10 seconds, the aqueous starch solution on the metal foam nickel base becomes sticky due to the evaporation of water;

[0036] (4) With the help of tweezers, press the back of the metal foam substrate up and gently, and finally a large number of black bubbles will be generated, which means the formation of two-dimensional amorphous carbon nanosheets;

[0037] (5) Prepare a coating on two-dimensional amorphous carbon: first, p...

Embodiment 3

[0040] A preparation scheme of a supercapacitor electrode material based on two-dimensional carbon nanosheets is carried out according to the following steps:

[0041] (1) Preparation of two-dimensional amorphous carbon on metallic nickel foam substrate: 3 g of starch was added to 10 mL of water, then the solution was stirred for 2 hours to form a paint-like suspension;

[0042] (2) Put metal foam nickel on a high-temperature heating plate and heat it to 400°C;

[0043] (3) 1.0ml paint-like suspension is added dropwise in the metal foam nickel, and after 10 seconds, the aqueous starch solution on the metal foam nickel base becomes sticky due to the evaporation of water;

[0044] (4) With the help of tweezers, press the back of the metal foam substrate up and gently, and finally a large number of black bubbles will be generated, which means the formation of two-dimensional amorphous carbon nanosheets;

[0045] (5) Prepare a coating on two-dimensional amorphous carbon: first, p...

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Abstract

The invention discloses a preparation method of a supercapacitor electrode material based on two-dimensional carbon nanosheets. Starch paste is heated on foamed nickel at 400 DEG C, so that a two-dimensional amorphous carbon nanosheet can be synthesized; the two-dimensional amorphous carbon nanosheet is coated with an active metal salt compound film, so that an obtained mixed electrode shows an excellent electron collection rate. Due to the synergistic effect of the active metal compound and the two-dimensional amorphous carbon nanosheet, the designed electrode shows high specific capacitance,good rate capability and excellent cycling stability. With the preparation method adopted, a new strategy is provided for the manufacturing of the two-dimensional carbon nanosheet, and a bright prospect is provided for the application of a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method of a supercapacitor electrode material based on two-dimensional carbon nanosheets. Background technique [0002] Carbon materials (activated carbon, carbon nanotubes, graphene, etc.) have been widely used as electrode materials for supercapacitors (Energy & Environmental Science 2016, 9, 729-762). Graphene is one of the most famous two-dimensional materials recently, and its good electrical conductivity, excellent high surface area and excellent mechanical flexibility have attracted more and more attention (Advanced Materials, 2018, 28, 3646-3652 ). In addition, Muralidharan et al. pointed out that amorphous carbon-based nanoparticles can improve the specific capacitance and cycle life of electrode materials (Energy & Fuels, 2013, 27, 3508-3515.). Traditionally, carbon-based electrode materials are prepared by pressing a binder-cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/36H01G11/44H01G11/46H01G11/24C01B32/05C01B32/15
CPCC01B32/05C01B32/15H01G11/24H01G11/30H01G11/36H01G11/44H01G11/46H01G11/86Y02E60/13
Inventor 王鹏王帅范孝良张希民陈涛段巍韩会龙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)