Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Bipolar plate of integrated composite electrode, and manufacturing method and application thereof

A composite electrode and bipolar plate technology, used in battery electrodes, circuits, fuel cells, etc., can solve the problems of electrical corrosion of conductive plastic bipolar plates, unstable structure, battery failure, etc., and achieve good mechanical properties and electrical conductivity. One-piece performance, easy-to-produce effects

Inactive Publication Date: 2012-07-11
黄权波
View PDF8 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defect of the composite electrode for the above-mentioned all-vanadium redox flow battery is that: after the conductive acetylene carbon black, conductive carbon fiber and graphite are added to the thermoplastic polymer, each conductive molecule between the conductive acetylene carbon black, conductive carbon fiber and graphite is It is bonded together by thermoplastic polymers, and thermoplastic polymers are non-conductive substances. In addition, because the thermoplastic polymer content in the thermoplastic conductive plate is less, that is, there are fewer adhesives, the thermoplastic conductive plate and the graphite felt are hot-pressed The compound composite electrode structure is not firm and unstable. After a period of charging and discharging cycles, the conductive acetylene carbon black, conductive carbon fiber and graphite will break, and the conductive plastic bipolar plate will be galvanically corroded. , the resistance between the conductive plastic bipolar plate and the graphite felt is getting bigger and bigger, and the conductive plastic bipolar plate will be corroded by electricity and cause the battery to fail

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
  • Bipolar plate of integrated composite electrode, and manufacturing method and application thereof
  • Bipolar plate of integrated composite electrode, and manufacturing method and application thereof
  • Bipolar plate of integrated composite electrode, and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An integrated composite electrode bipolar plate, prepared by the following method:

[0030] (1) PE plastic granules are heated and extruded to form softened plastic sheets;

[0031] (2) Place two 5mm thick graphite felts on the inside of the mold A and B boards respectively, place the PE plastic sheet between the two graphite felts, and then close the mold tightly;

[0032] (3) Vacuum the inside of the mold;

[0033] (4) Treat the mold and the graphite felt and PE plastic sheet in the mold at a constant temperature of 160-170°C for 75-100 minutes, during which time the mold is extruded through an extruder, and the PE plastic sheet is completely dissolved in the graphite felt after treatment. After cooling, an integrated composite electrode bipolar plate is obtained.

[0034] The structure of the prepared integrated composite electrode bipolar plate is as follows: figure 1 As shown, the graphite felt 2 and the PE plastic sheet 1 have been extruded and melted into one,...

Embodiment 2

[0036] An integrated composite electrode bipolar plate, prepared by the following method:

[0037] (1) PE plastic granules are heated and extruded to form softened plastic sheets;

[0038] (2) Place two 6mm thick carbon felts on the inner side of the mold A and B boards respectively, place the PE plastic sheet between the two carbon felts, and then close the mold tightly;

[0039] (3) Vacuum the inside of the mold;

[0040] (4) Treat the mold and the carbon felt and PE plastic sheet in the mold at a constant temperature of 180-190°C for 55-70 minutes, and extrude the mold through an extruder during this period. After the treatment, the PE plastic sheet is completely dissolved in the carbon felt. After cooling, an integrated composite electrode bipolar plate is obtained.

[0041] The structure of the prepared integrated composite electrode bipolar plate is as follows: figure 1As shown, the carbon felt 2 and the PE plastic sheet 1 have been extruded and melted into one, the p...

Embodiment 3

[0043] An integrated composite electrode bipolar plate, prepared by the following method:

[0044] (1) PE plastic granules are heated and extruded to form softened plastic sheets;

[0045] (2) Place two graphite felts with a thickness of 7mm on the inner side of mold A and plate B respectively, place the PE plastic sheet between the two graphite felts, and then close the mold tightly;

[0046] (3) Vacuum the inside of the mold;

[0047] (4) Treat the mold and the graphite felt and PE plastic sheet in the mold at a constant temperature of 200-210°C for 40-50 minutes, during which time the mold is extruded through an extruder, and the PE plastic sheet is completely dissolved in the graphite felt after treatment. After cooling, an integrated composite electrode bipolar plate is obtained.

[0048] The structure of the prepared integrated composite electrode bipolar plate is as follows: figure 1 As shown, the graphite felt 2 and the PE plastic sheet 1 have been extruded and melt...

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 discloses a bipolar plate of an integrated composite electrode, and a manufacturing method and application thereof. The bipolar plate of the integrated composite electrode consists of integrated graphite felts / carbon felts and a plastic sheet, wherein the plastic sheet is embedded between two graphite felts / carbon felts; and the long axis and the width axis of the plastic film are greater than those of the graphite felts / carbon felts. The bipolar plate of the integrated composite electrode can significantly reduce the resistance generated by tightly pressing the existing graphite felts / carbon felts and the bipolar plate; the bipolar plate of the integrated composite electrode takes the graphite felts / carbon felts conductive matrixes, so that the conductivity is significantly improved and the phenomenon that a conductive strand breaks is rarely caused; the bipolar plate of the integrated composite electrode is good in mechanical properties, easy to machine, bendable and difficult to deform and good in airtight performance; the phenomenon of fluid mixing of the battery can be avoided; the bipolar plate of the integrated composite electrode manufactured by the manufacturing method can increase the discharge medium pressure, the energy efficiency and the service life of a whole-vanadium oxide flow energy storage battery; and the structural damage of the graphite felts or carbon felts and the carbonation and decomposition of the plastic can be avoided.

Description

technical field [0001] The invention belongs to the technical field of redox flow energy storage batteries, and in particular relates to an integrated composite electrode bipolar plate for redox flow energy storage batteries and its preparation method and application. Background technique [0002] Electric energy is an indispensable secondary energy for human life and production in modern society. With the development of social economy and the continuous improvement of people's living standards, people's demand for electricity is also increasing. Since the power demand varies greatly between day and night and seasons, the construction of power plants must match the peak power consumption, the large investment utilization rate is low, and it has a great impact on the surrounding environment and ecological balance. Therefore, it is necessary to continuously develop various power stations and power transmission and distribution systems to meet the needs of life and production f...

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
IPC IPC(8): H01M4/86H01M4/96H01M8/02H01M4/88B29C70/46H01M8/0228H01M8/18
CPCY02E60/50
Inventor 黄权波
Owner 黄权波
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com