Waterborne fluoropolymer composition

Inactive Publication Date: 2012-01-19
ARKEMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An organic-solvent-based slurry presents safety, health and environmental dangers.
Organic solvents are generally toxic and flammable, volatile in nature, and involve special manufacturing controls to mitigate and reduce environmental pollution and safety risks.
Moreover, the large carbon footprint associated with use of organic solvents, is not environmentally desirable.
The patent fails to teach or suggest the use of any fugitive adhesion promoters, and specifically the use of organic carbonates in the latex to

Method used

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Examples

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Example

[0019]All references listed in this application are incorporated herein by reference. All percentages in a composition are weight percent, unless otherwise indicated, and all molecular weights are given as weight average monlecular weight, unless stated otherwise.

[0020]By “irreversible” as used herein in relation to an electrode formed from the polymer binder of the aqueous composition, is meant that following the drying of the aqueous composition in Which the polymer binder binds the powdery electrode-forming materials to each together and to the electroconductive substrate, the polymer binder is not soluble or redispersible in water. The irreversibility is due to the fact that the polymer particles flow and adhere to the powdery electrode-forming materials, providing interconnectivity within the electrode, This is opposed to an electrode formed from a PTFE dispersion or excessive water soluble thickener (such as carboxylated methyl cellulose) which form a binder without interconne...

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Abstract

This invention relates to a waterborne fluoropolymer composition useful for the fabrication of Li-Ion-Battery (LIE) electrodes. The fluoropolymer composition contains an organic carbonate compound, which is more environmentally friendly than other fugitive adhesion promoters currently used in waterborne fluoropolymer binders. An especially useful organic carbonate compound is ethylene carbonate (EC) and vinylene carbonate (VC), which are solids at room temperature, and other carbonates which are liquid at room temperature such as propylene carbonate, methyl carbonate and ethyl carbonate. The composition of the invention is low cost, environmentally friendly, safer, and has enhanced performance compared to current compositions.

Description

[0001]This application is a continuation-in-put of copending U.S. application Ser. No. 12 / 788,427, filed May 27, 2010, from which priority is claimed. This application also claims benefit, under U.S.C.§119(e) of U.S. Provisional Application No. 61 / 182364, filed May 29, 2009. The cited references are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to a waterborne fluoropolymer composition useful for the fabrication of Li-Ion-Battery (LIB) electrodes. The fluoropolymer composition contains an organic carbonate compound, which is more environmentally friendly than other fugitive adhesion promoters currently used in waterborne fluoropolymer binders. An especially useful organic carbonate compound is ethylene carbonate (EC) and vinylene carbonate (VC), which are solids at room temperature, and other carbonates which are liquid at room temperature such as propylene carbonate, methyl carbonate and ethyl carbonate. The composition of the invention is low ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01G4/008H01B1/12H01B1/24H01M4/13B32B27/06
CPCH01G11/30H01G11/38H01M4/0404H01M4/62H01M4/623Y02E60/122H01M10/0525H01G11/48Y02E60/13H01M4/131H01M4/133H01M4/136H01G11/26H01M4/1391H01M4/621C08K5/1565Y10T428/3154Y02E60/10Y02P70/50H01G11/52C09D127/16H01M50/411H01M50/449C08L27/16F04C15/0096
Inventor AMIN-SANAYEI, RAMINGABOURY, SCOTT
Owner ARKEMA INC
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