Polymer electrolyte composition

• US 7,354,531 B2
• Filed: 07/31/2001
• Issued: 04/08/2008
• Est. Priority Date: 08/04/2000
• Status: Expired due to Fees

• Current Assignee: Shell Oil Company (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Smith, Michael John, MacCallum, James R., Smith, Christopher John, Boon, Wynham Henry, Forschner, Thomas Clayton, Gwyn, David Eric
• Primary Examiner(s): Silverman; Stanley S.
• Assistant Examiner(s): Vijayakumar; Kallambella
• Application Number:
  US10/343,804
• Publication Number:
  US 20030170546A1
• Time in Patent Office: 2,443 Days
• Field of Search: 252/511, 252/510, 252/519.4, 429/29, 429/30, 429/33, 429/46, 429/304
• US Class Current: 252/511
• 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 includes one or more polar materials and one or more polyesters of formula III,

wherein each unit A may be identical or different and is of the structure IV,

wherein each unit B may be identical or different and is of the structure V,

wherein R and R¹ are each, independently, hydrogen, optionally substituted hydrocarbyl or an inert functional group; 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 having said composition.

Claims

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

2. The composition of claim 1 wherein said polyesters have a weight average molecular weight greater than 30000.

3. The composition of claim 1 wherein said composition is a solid.

4. The composition of claim 1 wherein the composition further comprises one or more plasticizer compounds.

5. A composition for use as a polymer electrolyte comprising one or more polar materials and one or more polyesters of carbonic acid and a polyhydric alcohol which is selected from the group consisting of 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2-methyl-1,3-propanediol, and 2,2-dimethyl-1,3-propanediol, wherein the polyesters have a weight average molecular weight greater than 30000,

wherein the one or more polar materials are present in the composition in an amount of from 6 to 50 wt. % of the composition and the one or more polyesters are present in the composition in an amount of from 50 to 99 wt.%;

and

wherein at least one of the one or more polar materials is a salt or a proton conductor system, where the salt is selected from the group consisting of quaternary ammonium salts, ammonium thiocyanate salts, and triflate, perchlorate, bromide, chloride, iodide, bis(trifluoromethylsulphonyl)imide, tetrafluoroborate, trifluoromethanesulphonate, hexafluoroarsenate (V), thiocyanate, acetate, dichlorosulphonimide, fluorochlorosulphonimide, sulphonate and tetrachloroaluminate salts of lithium, sodium, potassium, nickel, zinc, silver, and lanthanides, and where the proton conductor system is selected from phosphoric acid or sulphamide; and

wherein the composition is amorphous.

6. The composition of claim 5 wherein the polyester is poly(trimethylene carbonate).

7. The composition of claim 5 wherein said composition is a solid.

8. The composition of claim 5 wherein the composition contains one or more plasticiser compounds.

9. The composition of claim 5 wherein the polyesters have a weight average molecular weight greater than 75000.

10. The composition of claim 9 wherein the polyesters have a weight average molecular weight greater than 250000.