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Compositions for bipolar plates and methods for manufacturing said compositions

A composition, polymer technology for end product manufacturing, sustainable manufacturing/processing, battery pack components, etc., that can solve problems such as difficulty in implementation

Pending Publication Date: 2021-04-13
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when PVDF is used in this method, the mixture of molten components is viscous, making it difficult to implement

Method used

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Examples

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Embodiment approach

[0033] According to various embodiments, the composition comprises the following features, in combination where appropriate.

[0034] The composition may be in the form of a powder, and in this case the conductive thermoplastic polymer particles are mixed with the second conductive filler particles.

[0035] According to another embodiment, the composition may be in the form of an agglomerated solid, and in this case the second conductive filler particles are bound to the particles (or domains) of the conductive thermoplastic polymer. It is in this agglomerated form that the composition is shaped into a bipolar plate.

[0036] Dispersing the first conductive filler in the thermoplastic polymer renders the thermoplastic polymer conductive. When the resistance of thermoplastic polymer wire is less than 10 6 ohm, the polymer is conductive. Preferably, the loading of the first conductive filler is such that a permeation threshold through the thermoplastic polymer matrix is ​​re...

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Abstract

The present invention relates to new compositions for bipolar plates and to methods for manufacturing said compositions. More specifically, the invention relates to a method for manufacturing a composition, comprising the following steps: mixing a thermoplastic polymer in the molten state with a first conductive charge in order to obtain a conductive thermoplastic polymer; grinding said conductive thermoplastic polymer in order to reduce it to a powder; mixing the conductive thermoplastic polymer powder with a second conductive charge.

Description

technical field [0001] The present invention relates to novel compositions for use in bipolar plates and methods of making said compositions. Background technique [0002] Bipolar plates are used in fuel cells and redox flow batteries. They can be made from a variety of materials: metallic bipolar plates, graphite plates, and carbon-polymer composite plates. [0003] The principle of bipolar plates based on organic composites is based on the use of conductive fillers (carbon, graphite, etc.) dispersed in thermoplastic or thermosetting polymers. The filler provides the bipolar plate with the electrical conductivity needed to collect current, and the polymer matrix provides the bipolar plate with the proper mechanical strength needed to assemble the various components. [0004] Carbon-polymer composite bipolar plates have favorable properties: high electrical conductivity, good corrosion resistance, good performance at high temperatures, and good mechanical properties, as we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0226H01M8/18
CPCH01M8/0226H01M8/188Y02E60/50Y02P70/50Y02E60/10H01M8/0221H01M8/0213H01M50/406H01M50/446B29B9/02B29B9/12B29C43/003B29C45/0001B29C45/0013B29K2023/06B29K2023/12B29K2081/04B29K2507/04B29K2509/00B29K2995/0005
Inventor S.比泽特J.乔韦奥
Owner ARKEMA FRANCE SA