Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A kind of bipolar plate containing fluorine and its preparation method

A bipolar plate and plate technology, which is applied in the direction of fuel cells, regenerative fuel cells, electrical components, etc., can solve the problems of low impact strength and bending strength, high price, poor liquid resistance, etc., to improve uniformity, Improved quality and good dispersion uniformity

Active Publication Date: 2019-10-29
大连融科储能装备有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The bipolar plate materials that may be used in flow batteries mainly include metal bipolar plates, graphite bipolar plates, and carbon-plastic composite bipolar plates. On the one hand, it is an excellent conductor for flow batteries, but it is not suitable for bipolar plate applications due to its high price
Graphite materials include non-porous graphite plates and flexible graphite plates. Graphite materials are relatively stable in acidic and alkaline solutions and can be used as bipolar plate materials for flow batteries. However, non-porous graphite is a brittle material, and its impact strength The bending strength and bending strength are very low, it is easy to break during the battery assembly process, and it cannot be made very thin. The flexible graphite plate is made of natural flake graphite after intercalation, water washing, drying and high temperature expansion. It is a kind of graphite material, which is fluffy and porous, not very compact, and has poor liquid resistance. It must be modified before it can be used.

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
  • A kind of bipolar plate containing fluorine and its preparation method
  • A kind of bipolar plate containing fluorine and its preparation method
  • A kind of bipolar plate containing fluorine and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 graphite worm+PVDF water-soluble emulsion

[0029] In step (1), expandable graphite with an expansion ratio of 200 and a mesh size of 80 meshes is used to expand graphite worms at a high temperature of 900°C to prepare graphite worms, and the prepared graphite worms are tested for water absorption, and the water absorption is measured to be about 2000%;

[0030] Step (2), get the graphite worm 80g that step (1) makes, get the PVDF water-soluble emulsion 100g that the mass ratio concentration is 20% (the original concentration of the finished product water-soluble emulsion that buys can negotiate with manufacturer as required and confirm, ex-factory concentration It can be controlled at about 10% to 60%) to prepare a sample with a PVDF content of 20%. According to the water absorption rate of graphite worms measured in step (1), 80g graphite worms need to absorb about 1600g of water. Add 1600g of deionized water to the emulsion to stir and dilute. Put the di...

Embodiment 2

[0038] Embodiment 2 graphite worm+graphene+PVDF water-soluble emulsion

[0039] In step (1), expandable graphite with an expansion ratio of 200 and a mesh size of 80 meshes is used to expand graphite worms at a high temperature of 900°C to prepare graphite worms, and the prepared graphite worms are tested for water absorption, and the water absorption is measured to be about 2000%;

[0040]Step (2), get 78g of the graphite worms that step (1) makes, get graphene 2g (few layer graphene powder: 1~5 layers of samples, thickness 3~5nm, diameter 20μm), take mass ratio concentration and be 20% 100g of PVDF water-soluble emulsion (the original concentration of the purchased finished water-soluble emulsion can be confirmed through consultation with the manufacturer as required, and the ex-factory concentration can be controlled at about 10% to 60%) to prepare a sample with a PVDF content of 20% according to the steps (1) The measured water absorption rate of graphite worms is 78g. Gra...

Embodiment 3

[0048] Embodiment 3 graphite worm+carbon fiber+PVDF water-soluble emulsion

[0049] In step (1), expandable graphite with an expansion ratio of 200 and a mesh size of 80 meshes is used to expand graphite worms at a high temperature of 900°C to prepare graphite worms, and the prepared graphite worms are tested for water absorption, and the water absorption is measured to be about 2000%;

[0050] Step (2), get the graphite worm 78g that step (1) makes, get short carbon fiber 2g (length 0.2~0.5mm, diameter 10 μm left and right conductive short fibers), get the PVDF water-soluble emulsion 100g that mass ratio concentration is 20% ( The original concentration of the purchased finished product water-soluble emulsion can be confirmed through negotiation with the manufacturer as required, and the ex-factory concentration can be controlled at about 10% to 60%) to prepare a sample with a PVDF content of 20%. The water absorption rate of worms is 78g. Graphite worms need to absorb about ...

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
Thicknessaaaaaaaaaa
Meshaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a fluorine-containing bipolar plate, and a preparation method thereof. The preparation method comprises following steps: expandable graphite is heated to a temperature higher than 900 DEG C for high temperature puffing desulphurization so as to obtain graphite worm; graphite worm and a fluorine-containing polymer suspension emulsion are delivered into a blender mixer for mixing at room temperature so as to obtain a material slurry, wherein the mass concentration of the fluorine-containing polymer suspension emulsion is controlled to be 10 to 60%; the obtained material slurry is delivered into an infrared ray drying oven for drying at 100 to 105 DEG C until the weight of an obtained product is constant; after drying, the product is subjected to secondary smashing and sieving so as to obtain a powder material; the powder material is subjected to continuous roll cold pressing so as to obtain a pre-compressed sheet material with a thickness of 3 to 10mm; and then continuous roll hot pressing is carried out to reduce the thickness to 0.5 to 1.5mm so as to obtain a finished product. The preparation method is mainly used for solving a uniform dispersion problem of fluororesin in graphite; the strength of the fluorine-containing bipolar plate is ensured, and at the same time the content of fluororesin in the fluorine-containing bipolar plate is reduced, the content of carbon in the fluorine-containing bipolar plate is increased, the electrical conductivity of the fluorine-containing bipolar plate is increased, and battery performance is improved at last.

Description

technical field [0001] The invention belongs to the technical field of vanadium redox flow batteries, and in particular relates to a fluorine-containing bipolar plate of a vanadium redox flow battery and a preparation method thereof. Background technique [0002] Flow battery is a new high-performance storage battery, which has the characteristics of high capacity, wide application field, long cycle life and large-scale storage. Since the 1970s, people have explored and studied a variety of flow batteries. According to Depending on the redox active pair used for the positive and negative electrolyte active materials, flow batteries can be divided into all-vanadium flow batteries, zinc / bromine flow batteries, zinc / chlorine flow batteries, zinc / nickel flow batteries, multi- Sodium sulfide / bromine flow batteries and more. The all-vanadium redox flow battery undergoes oxidation-reduction reactions on the electrode surface of vanadium ions in different valence states in the elec...

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): H01M8/0213H01M8/0226B29C51/10B29C51/46H01M8/18
CPCB29C51/10B29C51/46H01M8/0213H01M8/0226H01M8/188Y02E60/50
Inventor 马相坤张华民许晓波霍洋盛伟王紫雪李亮郭宁
Owner 大连融科储能装备有限公司
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
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