Energy Storage Device Comprising a Polyurethane Separator

Patent metadata

Field	Value
Publication number	US-2016133949-A1
Application number	US-201514880300-A
Country	US
Kind code	A1
Filing date	Oct 12, 2015
Priority date	Nov 10, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

Energy storage devices are improved by incorporating polyurethane separators, which separators comprise polyurethane polymers prepared by curing a polycarbonate based polyurethane prepolymer, which polyurethane polymers often further comprise metal or ammonium salts and are often swelled by an organic solvent.

First claim

What is claimed:

1 . An energy storage device comprising an ion transporting separator disposed between an anode region and a cathode region, wherein the separator comprises a polyurethane prepared by crosslinking a mixture comprising an isocyanate terminated pre-polymer having a polycarbonate backbone.

2 . The energy storage device according to claim 1 , wherein the separator comprises the polycarbonate based polyurethane polymer, a metal or ammonium salt, and/or an organic solvent.

3 . An energy storage device according to claim 1 comprising:
A) an anode region comprising an anode chamber and a current collector, which current collector resides within the anode chamber;
B) a cathode region comprising a cathode chamber and a current collector, which current collector resides within the cathode chamber; and
C) an ion transporting separator disposed between the anode chamber and the cathode chamber; wherein the separator comprises a polyurethane prepared by crosslinking a mixture comprising an isocyanate terminated pre-polymer having a polycarbonate backbone.

4 . The energy storage device according to claim 3 , wherein the separator comprises the polycarbonate based polyurethane polymer, a metal or ammonium salt, and/or an organic solvent.

5 . The energy storage device according to claim 4 wherein the metal salt is a sodium or lithium salt.

6 . The energy storage device according to claim 4 wherein the organic solvent comprises at least one solvent selected from the group consisting of cyclic carbonate esters acyclic dialkyl carbonate esters, butyrolactones, acetals, ethers, polyglymes, sulfoxides, sulfalones, amides and nitriles.

7 . The energy storage device according to claim 3 wherein the separator comprises the polycarbonate based polyurethane polymer, a sodium or lithium salt and at least one organic solvent selected from the group consisting of cyclic carbonate esters acyclic dialkyl carbonate esters, butyrolactones, acetals, ethers, polyglymes, sulfoxides, sulfalones, amides and nitriles.

8 . The energy storage device according to claim 1 comprising:
A) an anode region comprising an anode chamber, a current collector, which current collector resides within the anode chamber and an anolyte;
B) a cathode region comprising a cathode chamber a current collector, which current collector resides within the cathode chamber and a catholyte; and
C) an ion transporting separator disposed between the anode chamber and the cathode chamber; wherein the separator comprises a polyurethane prepared by crosslinking a mixture comprising an isocyanate terminated pre-polymer having a polycarbonate backbone.

9 . The energy storage device according to claim 8 , wherein the separator comprises the polycarbonate based polyurethane polymer, a metal or ammonium salt, and/or an organic solvent.

10 . The energy storage device according to claim 9 wherein the metal salt is a sodium or lithium salt.

11 . The energy storage device according to claim 9 wherein the organic solvent comprises at least one solvent selected from the group consisting of cyclic carbonate esters acyclic dialkyl carbonate esters, butyrolactones, acetals, ethers, polyglymes, sulfoxides, sulfalones, amides and nitriles.

12 . The energy storage device according to claim 8 wherein the separator comprises the polycarbonate based polyurethane polymer, a sodium or lithium salt and at least one organic solvent selected from the group consisting of cyclic carbonate esters acyclic dialkyl carbonate esters, butyrolactones, acetals, ethers, polyglymes, sulfoxides, sulfalones, amides and nitriles.

13 . The energy storage device according to claim 8 further comprising a vessel for storing anolyte or catholyte and/or a vessel for receiving spent anolyte or catholyte.

14 . The energy storage device according to claim 8 which is a redox flow cell comprising a flowable anolyte and a flowable catholyte.

15 . The flow cell of claim 14 wherein each of the flowable anolyte and flowable catholyte comprise an ion storage material comprising both redox active materials and working ions.

16 . The flow cell of claim 14 which is a non-aqueous, organic flow cell.

17 . The energy storage device according to claim 12 which is a non-aqueous, organic, redox flow cell comprising a flowable anolyte and a flowable catholyte.

Assignees

• Chemtura Corp

Inventors

• Madabusi Venkatramanan K
• Jackson Kevin

Classifications

• H01M50/406

  Moulding; Embossing; Cutting · CPC title

• H01M50/414

  Synthetic resins, e.g. thermoplastics or thermosetting resins · CPC title

• H01M2250/30

  Fuel cells in portable systems, e.g. mobile phone, laptop · CPC title

• H01M8/20 Primary

  Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes precedence) · CPC title

• H01M8/0239 Primary

  Organic resins; Organic polymers · CPC title