Unlock instant, AI-driven research and patent intelligence for your innovation.

Porous carbon-based composite material and preparation method thereof

A composite material, porous carbon technology, applied in the field of materials, can solve problems such as failure, unsatisfactory cycle stability, structural instability, etc.

Active Publication Date: 2020-10-02
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Suboptimal cycling stability often masks the inherent large capacitance of pseudocapacitive materials
These defects are due to complex factors related to the structural integrity, electronic properties, and electrochemical behavior of pseudocapacitive materials.
Charge storage via binding, intercalation, and intercalation of guest species often fails due to structural instability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous carbon-based composite material and preparation method thereof
  • Porous carbon-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] see figure 1 , the invention provides a method for preparing a porous carbon-based composite material, comprising the following steps:

[0028] 1) Preparation of porous carbon hydrogel.

[0029] Specifically, the porous carbon material is dispersed in deionized water, and the expanded state is prepared by hydrothermal reaction; the porous carbon material includes reduced graphene oxide sheet, graphene oxide, graphite foil, etched carbon fiber, carbon nanotube, carbon A type of airgel.

[0030] 2) Pre-polymerization and mixing: disperse the monomer of the conductive polymer into the porous carbon hydrogel, add a dopant solution containing an oxidative polymerizing agent, and carry out pre-polymerization of the monomer for 1-15 minutes to obtain a prepolymer / porous carbon Composite semi-finished products.

[0031] Specifically, the step of dispersing the monomer of the conductive polymer into the porous carbon hydrogel in this step may be to disperse the monomer of the...

Embodiment 1

[0037] Step 1): Weigh 0.12 kg of graphite oxide powder, pour 10 kg of deionized water into an ultrasonic cell pulverizer at an ultrasonic frequency of 25 KHz, ultrasonically disperse for 4 hours, and take out the graphene oxide dispersion. Weigh 10L of the dispersion liquid, place it in a hydrothermal reaction kettle, and keep the temperature at 170°C for 8h to obtain a three-dimensional self-assembled graphene hydrogel.

[0038] Step 2): soak the graphene hydrogel in 1mol / L hydrochloric acid solution, add 60mL of aniline monomer to the above hydrochloric acid solution and soak for 12h: dissolve 36g of ammonium persulfate in 2000mL of hydrochloric acid solution, and absorb The graphene hydrogel of aniline monomer is transferred to the hydrochloric acid solution dissolved in ammonium persulfate, and the pre-polymerization reaction is performed for 1 minute: the hydrogel after the reaction is taken out;

[0039] Step 3) Immediately transfer the semi-finished product of step 2) t...

Embodiment 2

[0041] Compared with Example 1, the prepolymerization time of Example 2 was 8 minutes, and other conditions remained unchanged.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a porous carbon-based composite material and a preparation method thereof. According to the method, the prepolymer polymerization deposition and spray drying process is controlled based on high-frequency disturbance, the porous carbon-based composite material is prepared, and rate-controllable conductive polymer growth and carbon material compounding are carried out; duringprepolymer polymerization deposition and spray drying processing under control of high-frequency disturbance, a mechanically soft carbon material is used as a buffer substrate, the stress in the conjugated polymer can be released, even if the doped conjugated polymer is broken, fragments can still be anchored on the substrate without disintegration, and tests prove that the specific capacitance ofthe composite material reaches 1039F / cm<3> at most, and 96.5% of specific capacitance is still kept after 1000 times of circulation, so that the cycle performance of the composite material is obviously superior to that of the existing carbon material / polymer composite material. The porous carbon-based composite pseudocapacitor material is suitable for high-stability and long-cycle capacitor application occasions.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a porous carbon-based composite material and a preparation method thereof. Background technique [0002] Cycling stability is a key indicator of the performance of supercapacitor electrodes, which is a measure to quantify how much capacitance is retained after a certain operating time and number of charge-discharge cycles. Materials with superior capacitance and rate capabilities have little practicality if they have a limited lifetime. With the continuous development of science and technology and the continuous increase of population, the problems of energy depletion and environmental pollution are becoming more and more serious. Therefore, the development of environmentally friendly and energy-efficient energy storage devices and energy conversion has gradually attracted people's attention. Among many energy storage devices, supercapacitor (electrochemical battery) is a high...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/36H01G11/40H01G11/48
CPCH01G11/24H01G11/30H01G11/32H01G11/36H01G11/40H01G11/48Y02E60/13
Inventor 贺艳兵谢伟森宋学文陈振游从辉王翠翠吕伟康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV