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1. 发明公开

EP4016680A1 METHOD FOR LAMINATING A POLYMER ELECTROLYTE FILM ONTO A POROUS SUPPORT LAYER FOR ENERGY STORAGE DEVICES 审中-公开
公开(公告)号：EP4016680A1
公开(公告)日：2022-06-22
申请号：EP20215599.0
申请日：2020-12-18
申请人： PAUL SCHERRER INSTITUT
发明人： GUBLER, Lorenz , SCHNEIDER, Aaron , DUBURG, Jamie , ZANZOLA, Elena
IPC分类号： H01M8/1058 , H01M50/403 , H01M8/1069 , H01M8/18
摘要： The present invention discloses a composite electrolyte membrane and a method to fabricate it. The composite electrolyte membrane is meant to be used in an electrochemical energy storage or conversion device, including but not limiting to redox flow batteries, fuel cells and electrolyzers.
The composite electrolyte membrane is produced according to a method for laminating a polymer electrolyte film onto a porous support layer for generating a composite membrane for energy storage devices; comprising the following steps:
a) placing the polymer electrolyte film on a first flat support plate;
b) placing the porous support layer on the polymer electrolyte film;
c) wetting the porous support layer with a first solution comprising a first solvent, which is a high boiling point solvent, used to partially solubilize the polymer electrolyte film allowing its solubilized fraction to flow into the pores of the porous support and a second solvent, which is a low boiling point solvent, to prevent excessive solubilization of the polymer electrolyte film, wherein the solubilized fraction of the polymer electrolyte film forms
an interlocking interface with a superficial part of the porous support layer;
d) placing a second flat support plate, preferably with two tissues to absorb solvent excess, on the wetted porous support layer to form a stack having sandwiched the polymer electrolyte film, the interlocking interface and the porous support layer between the first and the second flat support plates;
e) hot-pressing the stack at an elevated temperature and an elevated pressure for a pre-defined amount of time; and
f) cooling down the hot-pressed stack and removing the first and the second flat support plate to isolate the composite membrane comprising i) the polymer electrolyte film, ii) the now solidified and formerly solubilized fraction of the polymer electrolyte film penetrated into the pores of the porous support layer forming a solidified interlocking interface and iii) the porous support layer.

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