Porous electrode as well as conductive treatment method thereof

A porous electrode and electrode slurry technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of inability to control electrode morphology, large electrode internal resistance, poor conductivity of transition metal oxide activated carbon, etc.

Active Publication Date: 2019-05-21
CHINA THREE GORGES UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the electrode morphology cannot be controlled in the existing pulping and coating process, and at the same time solve the problems of poor conductivity of transition metal oxides, nitrogen-doped carbon materials and activated carbon, and large internal resistance of electrodes, etc., to provide a A simple and effective method for controlling the three-dimensional pore network morphology of electrodes and reducing the internal resistance of electrodes

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 electrode as well as conductive treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In the present invention, the preparation method of modified plant fiber and nano-cellulose regulating porous electrode is as follows:

[0014] (1): First weigh 80 g of PVA1788-acrylate copolymer grafted modified plant fibers and nanocellulose with a solid content of 5%, add 100 g of water and stir at high speed to disperse, and ultrasonicate at room temperature for 1 hour to obtain well-dispersed plant fibers. Then add 100g of 5% polyvinyl alcohol 1788 aqueous solution, 100g of 5% carboxymethylcellulose CMC solution, 15g of vinyl acetate-methyl methacrylate-butyl acrylate copolymer emulsion with 40% solid content and stir evenly, then add conductive 10g of carbon black, stir and disperse evenly, then add 70g of activated carbon, stir well and use it as electrode slurry for later use.

[0015] (2): Then, the dispersion system obtained in the step (1) is uniformly coated on the aluminum electrode sheet by a coating machine, and dried in hot air in a drying tunnel at 100°...

Embodiment 2

[0020] The preparation method of unmodified plant fiber regulation and control electrode porous structure among the present invention is as follows:

[0021] (1): First weigh 3.7g of bamboo fiber pulp board, add 100g of water and stir at high speed to disperse. Since the unmodified plant fiber is easy to agglomerate during ultrasonic treatment, add 2% nanocellulose in turn after about 5 minutes of ultrasonic treatment 15g, 100g of 5% polyvinyl alcohol 1788 aqueous solution, 100g of 5% carboxymethyl cellulose CMC solution, 15g of vinyl acetate-methyl methacrylate-butyl acrylate copolymer emulsion with 40% solid content, stir evenly, then add conductive carbon Black 10g, stir and disperse evenly, then add 70g of activated carbon, stir well and use as electrode slurry for later use.

[0022] (2): Then, the dispersion system obtained in the step (1) is uniformly coated on the aluminum electrode sheet by a coating machine, and dried in hot air in a drying tunnel at 100°C. The dry ...

Embodiment 3

[0027] In the present invention, modified plant fiber and nano-cellulose control nano-MnO 2 The preparation method of the porous electrode is as follows:

[0028] (1): First weigh 80 g of PVA1788-acrylate copolymer grafted modified plant fiber and nanocellulose with a solid content of 5%, add 220 g of water and stir at high speed to disperse, and obtain well-dispersed plant fiber after ultrasonic treatment at room temperature for 1 hour. Then add 60g of 5% polyvinyl alcohol 1788 aqueous solution, 140g of 5% carboxymethylcellulose CMC solution, 15g of vinyl acetate-methyl methacrylate-butyl acrylate copolymer emulsion with 40% solid content and stir evenly, then add conductive 10g of carbon black, stir and disperse evenly, then add 70g of nano-manganese dioxide, stir well and use it as electrode slurry for later use.

[0029] (2): Then, the dispersion system obtained in the step (1) is uniformly coated on the aluminum electrode sheet by a coating machine, and dried in hot air in...

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

No PUM Login to view more

Abstract

The invention relates to a porous electrode as well as a preparation method for conductive treatment and application thereof. Plant fibers and nanocellulose are introduced into a conventional electrode pulping and coating technological process, and a three-dimensional mesh structure is formed during the drying process of an electrode material by utilizing the excellent water absorption and water retention of the plant fibers and the nanocellulose. The porous electrode is further wetted and coated with conductive slurry, and a conductive path is formed along the three-dimensional mesh structureof the porous electrode, thereby improving the conductivity of the electrode, and significantly enhancing the energy density and power density of capacitors or lithium ion capacitors. The contradiction between electrochemical deposition, hydrothermal deposition and other electrode morphology control technologies and large-scale production is solved, and the technical problems of incapability of controlling the electrode morphology and the like in the conventional slurry coating process is solved. At the same time, the preparation process has the advantages of high efficiency and simplicity.

Description

technical field [0001] The invention relates to a method for improving the energy density and power density of supercapacitors and lithium ion capacitors, specifically, using cellulose and nanocellulose to control electrode morphology and conduction treatment methods. Background technique [0002] Based on the electric double layer and pseudocapacitive energy storage mechanism, supercapacitor is a new type of energy storage device with high power density and fast charge and discharge rate. The efficiency is still more than 80%), no pollution and other advantages, but the low energy density (10Wh / kg) restricts its development. According to E=1 / 2CV 2 , where E is the energy density, C is the electrode capacity, and V is the capacitance voltage. To improve the energy density of supercapacitors, most of the current research work is mainly focused on improving the capacity value of the electrode active material and the voltage of the capacitor. In terms of improving the capacit...

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): H01G11/24H01G11/30H01G11/32H01G11/38H01G11/46H01G11/86
Inventor 周昌林汪磊刘杨陈卫丰李永双李德江
Owner CHINA THREE GORGES UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap