US 9,431,677 B2 · Block copolymer including a polyanion based on a TFSILi anion monomer as a battery electrolyte

Abstract

The invention relates to a BA diblock or BAB triblock copolymer, in which the A block is a non-substituted poly-oxyethylene chain having a mean molecular weight that is no higher than 100 kDa, and the B block is an anionic polymer which can be prepared using one or more monomers selected from among the vinyl monomers and derivatives thereof, said monomers being substituted with a (trifluoromethylsulfonyl)imide (TFSI) anion. The invention also relates to the uses of such a copolymer, in particular for preparing an electrolyte composition for lithium metal polymer (LMP) batteries.

Claims19

Dependent claims

A diblock copolymer of the BA type or a triblock copolymer of the BAB type, wherein:

block A is an unsubstituted polyoxyethylene chain having a number-average molecular weight less than or equal to 100 kDa;
block B is an anionic polymer that can be prepared from one or more monomers selected from the vinyl monomers and derivatives thereof, said monomers being substituted with an anion (trifluoromethylsulfonyl)imide (TFSI) of the following formula:
in which * represents the point of attachment of said anion of formula (I) to said monomer via a covalent bond or a linear alkyl chain having from 1 to 5 carbon atoms.

Dependencies are inferred from the claim text.

Facts

Application

14/239,905Filed 5 Sep 2012

Priority

FR 11 578415 Sep 2011

Published

US 2014/0272600 A118 Sep 2014

Granted

30 Aug 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 10/0565
The electrolyte being constituted of organic materials only: polymeric materials, e.g. gel-type or solid-type
C08F 293/005
Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains…:…
C08J 5/2243
Based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds: obtained by introduction of active groups…
H01M 4/382
Alkaline or alkaline earth metals elements: lithium

Block copolymer including a polyanion based on a TFSILi anion monomer as a battery electrolyte

Life of this patent

Block copolymer including a polyanion based on a TFSILi anion monomer as a battery electrolyte

Life of this patent

Abstract

Claims19