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Fluoropolymer film

一种聚合物膜、聚合物的技术，应用在电化学和光电化学装置领域，能够解决低机械强度等问题

Active Publication Date: 2015-01-28
SOLVAY SA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although these ionically conductive gels have many useful properties, their use as electrolytes has many disadvantages due to their low mechanical strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0309] Example 1: Fabrication of Fluoropolymer Membrane with VDF / HEA Copolymer

[0310] Dissolution of VDF / HEA copolymer (0.4 g) was carried out overnight at room temperature in DMF (4 g) (10% by weight).

[0311] An electrolyte solution was formed by a mixture of electrolyte salt (ES-1) and ionic liquid (IL-1) in the following relative amounts: 0.5M LiTFSI in Pyr13TFSI. The electrolyte solution thus obtained has 2.4 x 10 -3 Ionic conductivity in S / cm.

[0312] The electrolyte solution (1 g) and tetraethoxysilane (TEOS) (0.38 g) were added to the VDF / HEA copolymer solution and stirred at room temperature for 10 minutes. The mixture obtained contained 27% by volume (32% by weight) of VDF / HEA copolymer, 64% by volume (60% by weight) of electrolyte solution and 9% by volume (8% by weight) ) of SiO 2 (equivalent value of fully condensed TEOS).

[0313] Then 0.64 g of formic acid was added to the mixture and the mixture was stirred at room temperature for 2 minutes.

[0314] ...

example 2

[0318] Example 2: use 6008VDF homopolymer to make fluoropolymer film

[0319] The same preparation procedure as detailed in Example 1 was carried out, but the VDF / HEA copolymer was replaced by 6008VDF homopolymer.

[0320] The fluoropolymer film thus obtained has a 2.3x 10 -4 Ionic conductivity in S / cm.

[0321] A break point was observed at a bending angle of 110°.

example 3

[0322] Example 3: Fabrication of Fluoropolymer Membrane with VDF / HEA Copolymer

[0323] The same procedure as detailed in Example 1 was carried out, but using an electrolyte solution containing 18.7% by volume (22.1% by weight) of VDF / HEA copolymer, 75% by volume (70.3% by weight) and 6.3% by volume (5.6% by weight) SiO 2 (TEOS fully condensed equivalent value) mixture.

[0324] The fluoropolymer film thus obtained has a 4.6x 10 -4 Ionic conductivity in S / cm.

[0325] A break point was observed at an angle of 150°.

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Abstract

The invention pertains to a process for manufacturing a fluoropolynner film comprising a fluoropolymer hybrid organic / inorganic composite, said process comprising the following steps: (i) providing a mixture of: - at least one fluoropolymer [polymer (F)]; - at least one metal compound [compound (M)] having formula: X4-mAYm wherein m is an integer from 1 to 4, A is a metal selected from the group consisting of Si, Ti and Zr, Y is a hydrolysable group and X is a hydrocarbon group, optionally comprising one or more functional groups; - a liquid medium consisting essentially of at least one ionic liquid (IL) and, optionally, at least one additive (A); - optionally, at least one electrolytic salt (ES); and - optionally, at least one organic solvent (S); (ii) hydrolysing and / or polycondensing said compound (M) to yield a liquid mixture comprising fluoropolymer hybrid organic / inorganic composite comprising inorganic domains and incorporating said liquid medium; (iii) processing a film from the liquid mixture obtained in step (ii); and (iv) drying and then, optionally, curing the film obtained in step (iii) for obtaining the fluoropolymer film. The invention also pertains to the fluoropolymer film obtained from said process and to use of said fluoropolymer film in electrochemical and photo-electrochemical devices.

Description

[0001] This application claims priority from European Application No. 12305471.0 filed 23.04.2012, the entire content of which is hereby incorporated by reference for all purposes. technical field [0002] The present invention relates to a process for the manufacture of fluoropolymer membranes, to the fluoropolymer membranes obtained therefrom and to the use of said fluoropolymer membranes in electrochemical and photoelectrochemical devices. Background technique [0003] Fluoropolymers, and especially vinylidene fluoride polymers, have been used successfully in a wide variety of applications, including electrochemical applications. [0004] Specifically, because of their chemical resistance and heat aging resistance, fluoropolymers are used as raw materials for polymer films used in electrochemical devices such as secondary batteries. [0005] A metal-ion secondary battery is typically formed by assembling a metal positive electrode (anode), an ion-conducting membrane, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0567H01M10/0569H01M8/10C09K9/00G02F1/00H01G9/20
CPCH01M8/1044H01M10/0567Y02E10/542G02F2001/1519Y02E60/521H01M8/1039H01M8/1023H01M8/1037H01M2300/0045H01M10/0565H01M10/0569H01M8/1048C09K9/02H01M8/1051G02F2001/164Y02E60/10Y02P70/50Y02E60/50C08J5/18C08L27/12C08L33/04H01G9/2009H01M10/0525H01M50/411C08J2327/16H01M2008/1095H01M2300/0082
Inventor J.A.阿布斯勒梅J.勒比德奧A.古尤马德-拉克D.古尤马德B.勒斯特里伊兹
Owner SOLVAY SA
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