Polymer electrolyte composition

• US 20030170546A1
• Filed: 02/18/2003
• Published: 09/11/2003
• Est. Priority Date: 08/04/2000
• Status: Active Grant

• Current Assignee: Shell Oil Company (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Smith, Christopher John, Maccallum, James R., Smith, Michael John, Forschner, Thomas Clayton, Gwyn, David Eric, Boon, Wyndham Henry
• Granted Patent: US 7,354,531 B2
• Time in Patent Office: Days
• US Class Current: 429/317
• CPC Class Codes: G01N 27/4073 Composition or fabrication of the solid electrolyte
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A composition for use as a polymer electrolyte, wherein said composition comprises one or more polar materials and one or more polyesters (polymers of carbonic acid); a process for preparing said composition; the use of said composition as a polymer electrolyte in coulometers, displays, smart windows, cells or batteries; and a cell and/or battery comprising said composition.

Claims

1. A composition for use as a polymer electrolyte, wherein said composition comprises one or more polar materials and one or more polyesters of formula III,

2. A composition according to claim 1, wherein the polyester is poly(trimethylene carbonate).

3. A composition according to claim 1 or 2, wherein the polar material is a lithium metal salt.

4. A composition according to any one of claims 1 to 3, wherein said composition is a solid.

5. A composition according to any one of claims 1 to 4, wherein the molar ratio, n, of monomer units per mole of added polar material is in the range of from 1 to 100.

6. A composition according to any one of claims 1 to 5, wherein the composition further comprises one or more plasticiser compounds.

7. A process for preparing a composition according to any one of claims 1 to 6, wherein a solution comprising a homogeneous mixture of the polyester and the salt components are prepared in a solvent;

and, optionally, the solvent of said solution is allowed to evaporate under an inert atmosphere.

8. A process for preparing a composition according to any one of claims 1 to 6, wherein polyester monomers are polymerised in situ in the presence of the salt components.

9. The use of compositions according to any one of claims 1 to 6 as a polymer electrolyte in coulometers, displays, smart windows, cells or batteries.

10. A cell and/or battery comprising a composition according to any one of claims 1 to 6.