Surface-treated microporous membrane and electrochemical...

H - Electricity – 01 – M

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H01M 2/16 (2006.01)

Patent

CA 2589104

Disclosed is a porous film comprising: (a) a porous substrate having pores; and (b) a coating layer formed on at least one region selected from the group consisting of a surface of the substrate and a part of the pores present in the substrate, wherein the coating layer comprises styrene-butadiene rubber. An electrochemical device using the porous film as a separator is also disclosed. The porous film is coated with a styrene-butadiene polymer, whose rubbery characteristics can be controlled, and thus provides improved scratch resistance and adhesion to other substrates. When the porous film is used as a separator for an electrochemical device, it is possible to improve the safety of the electrochemical device and to prevent degradation in the quality of the electrochemical device.

L'invention concerne un film poreux constitué: a) d'un substrat poreux présentant des pores; et b) d'une couche de revêtement formée sur au moins une zone sélectionnée dans le groupe constitué par une surface d'un substrat et une partie des pores présents sur le substrat, la couche de revêtement comprenant un caoutchouc de type styrène-butadiène. L'invention concerne également un dispositif électrochimique utilisant le film poreux comme séparateur. Le film poreux est revêtu d'un polymère de type styrène-butadiène, dont les caractéristiques coutchoutiques peuvent être contrôlées et qui présente donc une résistance à la rayure améliorée et une adhérence à d'autres substrats. L'utilisation du film poreux comme séparateur pour un dispositif électrochimique permet d'améliorer la sûreté du dispositif et d'empêcher la dégradation de la qualité de celui-ci.

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