Composite polymer electrolytes for alkali metal electrochemical devices which contain a glass fiber net

• US 6,080,511 A
• Filed: 06/12/1998
• Issued: 06/27/2000
• Est. Priority Date: 06/12/1998
• Status: Expired due to Fees

• Current Assignee: Lithium Technologies Incorporated (Khoros LLC)
• Original Assignee: Lithium Technologies Incorporated (Khoros LLC)
• Inventors: Kejha, Joseph B.
• Primary Examiner(s): Bell, Bruce F.
• Application Number:
  US09/096,835
• Time in Patent Office: 746 Days
• Field of Search: 429/300, 429/302, 429/303, 429/307, 429/310, 429/311, 429/313, 429/314, 429/321, 429/322, 429/323
• US Class Current: 429/303
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 2300/0091 in the form of mixtures
• CPC Class Codes: H01M 2300/0094 in the form of layered products, e.g. coatings
• CPC Class Codes: H01M 50/414 Synthetic resins, e.g. thermoplastics or thermosetting resins
• CPC Class Codes: H01M 50/426 Fluorocarbon polymers
• CPC Class Codes: H01M 50/437 Glass
• CPC Class Codes: H01M 50/44 Fibrous material
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Polymer electrolyte composites for alkali metal electrochemical devices which are formed by coating an inert, lightweight, electrically insulating, woven or non-woven glass fiber net with a liquid, ion-conductive polymer, and curing the polymer to form a solid state or semi-solid state electrolyte composite.

Claims

1. A solid or semi-solid state polymer electrolyte composite for alkali metal-ion electrochemical devices wherein the electrolyte composite comprises

an electrically insulating length of woven glass fiber net which has been coated with and is embedded in an ionically conductive solid or semi-solid state matrix, and

said solid or semi-solid state matrix is formed from an ion conductive liquid which has been solidified by cooling.

2. A solid or semi-solid state polymer electrolyte composite for alkali metal-ion electrochemical devices wherein the electrolyte composite comprises an electrically insulating length of woven glass fiber net which has been coated with and is embedded in an ionically conductive solid or semi-solid state matrix, and

said solid or semi-solid state matrix is formed from an ion conductive liquid which has been solidified by cooling and evaporation.

3. A solid or semi-solid state polymer electrolyte composite for alkali metal-ion electrochemical devices wherein the electrolyte composite comprises

an electrically insulating length of woven glass fiber net which has been coated with and is embedded in an ionically conductive solid or semi-solid state matrix and

said solid or semi-solid state matrix, is formed from an ion conductive liquid which has been solidified, and

said matrix contains at least one aprotic liquid and at least one salt.

4. A composite as defined in claim 3 in which

said aprotic liquid contains butylene carbonate.

5. A composite as defined in claim 3 in which

said aprotic liquid contains propylene carbonate.

6. A composite as defined in claim 3 in which

said aprotic liquid contains ethylene carbonate.

7. A composite as defined in claim 3 in which

said aprotic liquid contains at least one ester.

8. A composite as defined in claim 3 in which

said aprotic liquid contains dimethyl carbonate.

9. A composite as defined in claim 3 in which

said aprotic liquid contains diethyl carbonate.

10. A composite as defined in claim 3 which contains lithium hexafluorophosphate salt.