US 11,342,573 B2 · Ion-imbibed membranes based on proton conducting aromatic polyether type copolymers and their application in redox flow batteries

Abstract

The present invention relates to a class of polymer ion imbibed membranes for electrolyte flow batteries. The membranes are a conducting aromatic polyether type copolymer bearing nitrogen heterocycles groups, especially pyridine type. While the membranes can be used in acid, basic, and neutral electrolytes, the nitrogen heterocycles in the membrane interact with acid in the electrolyte to form a proton transport network, so as to keep the proton transport performance of the membrane. The membrane has excellent mechanical stability and thermostability as well as tunable porosity.

Claims27

Dependent claims

A proton-conducting copolymer for use in redox flow batteries, the copolymer comprising

heterocycle aromatic moieties containing one or more nitrogen groups,
wherein said copolymer is imbibed with an electrolyte,
wherein percentages of an aromatic diol in combination with an allyl diol in composition of the copolymer are 50%-75% of the aromatic diol and not more than 20% of an allyl diol, and
wherein the aromatic diol is a non-linear pyridine diol.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

16/806,002Filed 2 Mar 2020 · us provisional application

Priority

11 Jan 2019

Published

US 2020/0411892 A131 Dec 2020

Granted

24 May 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01M 8/188
Regeneration by electrochemical means: by recharging of redox couples containing fluids; Redox flow type batteries
H01M 8/1027
Characterised by the chemical structure of the main chain of the ion-conducting polymer: having carbon, oxygen and other atoms, e.g. sulfonated…
H01M 8/1032
Characterised by the chemical structure of the main chain of the ion-conducting polymer: having sulfur, e.g. sulfonated-polyethersulfones [S-PES]
Y02E 60/50
Hydrogen technology: fuel cells

Ion-imbibed membranes based on proton conducting aromatic polyether type copolymers and their application in redox flow batteries

Life of this patent

Ion-imbibed membranes based on proton conducting aromatic polyether type copolymers and their application in redox flow batteries

Life of this patent

Abstract

Claims27