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Battery separator coating

A diaphragm and electrochemical technology, applied in the field of vinylidene fluoride polymer aqueous dispersion, can solve the problems of battery performance, cycle life and power impact

Pending Publication Date: 2021-03-26
SOLVAY SOLEXIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, battery performance attributes such as cycle life and power can be significantly affected by separator choice

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Embodiment Construction

[0034] In the context of the present invention, the term "weight percent" (wt %) indicates the content of a particular component in a mixture, calculated as the ratio between the weight of the component and the total weight of the mixture. When referring to a repeating unit derived from a monomer in a polymer / copolymer, weight percent (wt %) indicates the difference between the weight of the repeating unit of such monomer and the total weight of the polymer / copolymer The ratio. When referring to the total solids content of a liquid composition, weight percent (wt %) indicates the ratio between the weights of all non-volatile ingredients in the liquid.

[0035] The term "separator" is intended herein to mean a porous single or multilayer polymeric material that electrically and physically separates electrodes of opposite polarity in an electrochemical cell and is permeable to ions flowing therebetween .

[0036] The term "electrochemical cell" is intended herein to mean an el...

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Abstract

The present invention pertains to a vinylidene fluoride polymer aqueous dispersion, to a method for its preparation and to its use for the manufacture of electrochemical cell components, such as electrodes and / or separators.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from European Application No. 18187063.5 filed on 02.08.2018, the entire content of which is hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to an aqueous vinylidene fluoride polymer dispersion, a process for its preparation and its use for the manufacture of electrochemical cell components such as electrodes and / or separators. Background technique [0004] Lithium-ion batteries have become essential in our daily lives. In the context of sustainable development, they are expected to play a more important role, as they are already attracting increasing attention due to their use in electric vehicles and storage of renewable energy. [0005] The separator layer is an important part of the battery. These layers are used to prevent the anode and cathode of the battery from touching while allowing the electrolyte to pass through the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/449H01M50/417H01M10/0525C09D127/16H01M50/414H01M50/42H01M50/426H01M50/489H01M50/491
CPCC09D127/16H01G11/52Y02T10/70Y02E60/10H01M50/403H01M50/417H01M50/414H01M50/491H01M50/489H01M50/426H01M50/42C08L29/04H01M50/446C09D7/61H01M50/451H01M10/0525
Inventor E·莫林那
Owner SOLVAY SOLEXIS