Ionically conductive polymer for use in electrochemical devices

Details Ionically conductive polymer for use in electrochemical devices Ionically conductive polymer for use in electrochemical devices

C - Chemistry, Metallurgy

08

G

C08G 75/14 (2006.01) C08G 65/40 (2006.01) H01B 1/12 (2006.01) H01M 4/86 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2703710

An ionically conductive polymer has the chemical structure 1 as shown herein. Examples of the polymer include 4,4'-(4-(1H-benzo[d]imidazol-2-yl)butane-2,2-diyl)diphenol, sulfonated poly(aryl ether sulfone) containing benzimidazole backbone, sulfonated poly(aryl ether sulfone) containing carboxylic acid backbone, and sulfonated poly(aryl ether sulfone) containing benzimidazole backbone from carboxylic acid containing sulfonated poly(aryl ether sulfone). The polymer has intrinsic ion conducting properties so that it is effectively conductive even under low water conditions. In one embodiment, the polymer has an ionic conductivity of at least 1 x 10 -5 S/cm at a temperature of 120 °C when the polymer is substantially anhydrous.

L'invention porte sur un polymère conducteur ionique de la structure chimique 1 telle que définie dans la description. Des exemples du polymère comprennent le 4,4'-(4-(1H-benzo[d]imidazol-2-yl)butane-2,2-diyl)diphénol, un poly(aryl éther sulfone) sulfoné contenant un squelette benzimidazole, un poly(aryl éther sulfone) sulfoné contenant un squelette acide carboxylique, et un poly(aryl éther sulfone) sulfoné contenant un squelette benzimidazole issu du poly(aryl éther sulfone) sulfoné contenant l'acide carboxylique. Le polymère de l'invention possède des propriétés de conduction ionique intrinsèques de sorte qu'il est un conducteur efficace même dans des conditions de faible teneur en eau. Dans un mode de réalisation, le polymère précité possède une conductivité ionique d'au moins 1 x 10-5 S/cm à une température de 120°C lorsque le polymère est sensiblement anhydre.

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