Multi-layer polymeric electrolytes for electrochemical devices

• US 5,925,483 A
• Filed: 05/06/1996
• Issued: 07/20/1999
• Est. Priority Date: 05/06/1996
• Status: Expired due to Fees

• Current Assignee: Lithium Technologies Incorporated (Khoros LLC)
• Original Assignee: Lithium Technologies Incorporated (Khoros LLC)
• Inventors: Kejha, Joseph B., Kogis, Charles T.
• Primary Examiner(s): KALAFUT, STEPHEN J
• Application Number:
  US08/642,967
• Time in Patent Office: 1,170 Days
• Field of Search: 429/192, 429/190, 429/145, 429/303, 429/306, 429/317
• US Class Current: 429/303
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 2300/0097 with adhesive layers
• CPC Class Codes: H01M 6/181 with polymeric electrolytes
• CPC Class Codes: H01M 6/187 Solid electrolyte characterised by the form
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Composite layered solid or semi-solid state polymeric electrolytes which contain at least a first layer which is a tough, mechanically strong adhesive layer which is non-reactive with alkali metal and preferably polyalkylene oxide based such as PEO, which is applied to an anode, and a second layer applied to a cathode which is a moist, adhesive layer which may be reactive with alkali metal, is loaded with aprotic liquids and alkali metal salts which activates the first layer and maintains the cell integrity.

Claims

1. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first ion conductive polymeric layer in contact with said anode, which layer is substantially non-reactive with alkali or alkaline earth metals, and

a second layer in contact with said first layer and said cathode, which is an ion conductive polymer layer, which contains at least one aprotic liquid, and at least one alkali metal salt, which soaks into and activates the first layer and does not destroy the first layer.

2. A composite layered polymeric electrolyte as defined in claim 1 in which said first layer is a polyalkylene oxide based coating which contains at least one ether, at least one ester, and at least one alkali metal salt.

3. A composite layered polymeric electrolyte as defined in claim 1 in which said second layer is a polyvinyldienefluoride homopolymer--polyalkylene oxide alloy based coating.

4. A composite layered polymeric electrolyte as defined in claim 1 in which said second layer is a polyvinyldienefluoride copolymer--polyalkylene oxide alloy based coating.

5. A composite layered polymeric electrolyte as defined in claim 1 in which said first layer is a polyalkylene oxide based coating which contains at least one ester, and at least one alkali metal salt.

6. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains an ether, an ester, an alkali-metal salt, and

a second layer in contact with said first layer, and said cathode, which layer is a polyvinyldienefluoride-polyethylene oxide alloy based coating which contains a plurality of esters and an alkali metal salt.

7. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 6 in which

said first layer contains tetrahydrofuran, from 0.01% to 40% by percentage weight, ethylene carbonate in the range of 1% to 60%, by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyethylene oxide in the range of 0.5 to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium perchlorate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

8. A composite, layered solid, or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 6 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

9. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains an ether, an ester, an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyvinyldienefluoride/hexafluoropropylene-polyethylene oxide alloy based coating which contains a plurality of esters and an alkali metal salt.

10. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 9, in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, ethylene carbonate in the range of 1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium perchlorate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride/hexafluoropropylene in the range of 0.1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

11. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 9, in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, ethylene carbonate in the range of 1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride/hexafluoropropylene in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

12. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains at least one ester, an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyvinyldienefluoride/hexafluoropropylene-polyethylene oxide alloy based coating which contains an ether, at least one ester and an alkali metal salt.

13. A composite layered electrolyte as defined in claim 12 in which

said first layer contains ethylene carbonate in the range of 0.1% to 60%, by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride/hexafluoropropylene in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

14. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains at least one ester, an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyvinyldienefluoride/polyethylene oxide alloy based coating which contains an ether, at least one ester and an alkali metal salt.

15. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 14, in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, ethylene carbonate in the range of 1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains tetrahydrofuran in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium perchlorate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

16. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 14, in which

said first layer contains lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

17. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains at least one ester, an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polymer based coating which contains at least one alkali metal salt, and at least one aprotic liquid selected from a group which does not dissolve or attack polyethylene oxide.

18. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains an ether, an ester, an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyethylene oxide based coating, which contains a plurality of esters and an alkali metal salt.

19. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 18 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, ethylene carbonate in the range of 1% to 60%, by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

20. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains at least one ester and an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyethylene oxide based coating which contains an ether, at least one ester and an alkali metal salt.

21. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide-polyvinyldienefluoride alloy based coating which contains an ether, a plurality of esters, and an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyvinyldienefluoride-polyethylene oxide alloy based coating which contains a plurality of esters, and an alkali metal salt.

22. A composite, layered solid or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 21 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60%, by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90% by percentage weight, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium perchlorate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in a range of 0.5% to 70% by percentage weight.

23. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains at least one ester and an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains an ether, at least one ester, and an alkali metal salt.

24. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains at least one ester and an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which layer is a polyethylene oxide based coating which contains an ether, at least one ester, and an alkali metal salt.

25. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide-polyvinyldienefluoride alloy based coating which contains an ether and a plurality of esters, and

a second layer in contact with said first layer and said cathode, which layer is a polyethylene oxide based coating which contains an ether, at least one ester, and an alkali metal salt.

26. An electrochemical device having a metallic anode and a cathode, with a composite, layered solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains an ether and an alkali metal salt, and

a second layer in contact with said first layer and said cathode which second layer is a polyvinyldienefluoride-polyethylene oxide alloy based coating, which contains a plurality of esters and an alkali metal salt, or a polyvinyldienefluoride/hexafluoropropylene-polyethylene oxide alloy based coating which contains a plurality of esters and an alkali metal salt, or a polyvinyldienefluoride/hexafluoropropylene-polyethylene oxide alloy based coating, which contains an ether, at least one ester and an alkali metal salt, or a polyvinyldienefluoride/polyethylene oxide alloy based coating which contains an ether, at least one ester and an alkali metal salt, or a polymer based coating which contains at least one alkali metal salt, and at least one aprotic liquid selected from a group which does not dissolve or attack polyethylene oxide.

27. A composite, layered solid, or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 26 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90%, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyvinyldienefluoride/hexafluoropropylene in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

28. A composite, layered solid, or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 26 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains tetrahydrofuran in the range of 0.1% to 90%, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium perchlorate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

29. A composite, layered solid, or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 26 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90%, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, polyvinyldienefluoride in the range of 0.1% to 70% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

30. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which first layer is a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains at least one ester and an alkali metal salt, and

a second layer in contact with said first layer and said cathode which second layer is a polyethylene oxide based coating, which contains a plurality of esters and an alkali metal salt, or a polyethylene oxide based coating which contains an ether, at least one ester and an alkali metal salt.

31. A composite, layered solid, or semi-solid state polymeric electrolyte for electrochemical devices as defined in claim 30 in which

said first layer contains tetrahydrofuran from 0.01% to 40% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight, and

said second layer contains dimethyl carbonate in the range of 0.1% to 90%, ethylene carbonate in the range of 0.1% to 60% by percentage weight, lithium triflate in the range of 1% to 50% by percentage weight, and polyethylene oxide in the range of 0.5% to 70% by percentage weight.

32. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains an ether and an alkali metal salt, and

a second layer in contact with said first layer and said cathode which second layer is a polyvinyldiendfluoride-polyethylene oxide alloy based coating which contains a plurality of esters, and an alkali metal salt, or a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains an ether, at least one ester, and an alkali metal salt, or a polyethylene oxide based coating, which contains an ether, at least one ester, and an alkali metal salt.

33. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which layer is a polyethylene oxide based coating which contains an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which second layer is a polyvinyldienefluoride-polyethylene oxide alloy based coating which contains a plurality of esters and an alkali metal salt, or a polyvinyldienefluoride/hexafluoropropylene-polyethylene oxide alloy based coating which contains a plurality of esters and an alkali metal salt, or apolyvinyldienefluoride/hexafluoropropylene-polyethylene oxide alloy based coating which contains an ether, at least one ester and an alkali metal salt, or a polyvinyldienefluoride/polyethylene oxide alloy based coating which contains an ether, at least one ester and an alkali metal salt, or a polymer based coating which contains at least one alkali metal salt, and at least one aprotic liquid selected from a group which does not dissolve or attack polyethylene oxide.

34. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which first layer is a polyethylene oxide based coating which contains an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which second layer is a polyethylene oxide based coating, which contains a plurality of esters and an alkali metal salt, or a polyethylene oxide based coating which contains an ether, at least one ester and an alkali metal salt.

35. An electrochemical device having a metallic anode and a cathode, with a composite, layered, solid or semi-solid state polymeric electrolyte in contact therewith, which electrolyte comprises

a first layer in contact with said anode, which first layer is a polyethylene oxide based coating which contains an alkali metal salt, and

a second layer in contact with said first layer and said cathode, which second layer is a polyvinyldienefluoride-polyethylene oxide alloy based coating which contains a plurality of esters, and an alkali metal salt, or a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains an ether, at least one ester, and an alkali metal salt, or a polyethylene oxide based coating which contains an ether, at least one ester, and an alkali metal salt.

36. An electrochemical device having a metallic anode and a cathode, with a composite, multi-layered, solid or semi-solid state polymeric electrolyte in contact therewith, which comprises at least three layers, which includes a first layer, a second layer, a third layer and combinations thereof, wherein

said first layer is in contact with said anode, which first layer is substantially non-reactive with alkali or alkaline earth metals, or is a polyalkylene oxide based coating which contains at least one ether, at least one ester, and at least one alkali metal salt, or a polyethylene oxide based coating which contains an ether, an ester, and an alkali-metal salt, or a polyethylene oxide based coating which contains at least one ester, and an alkali metal salt, or a polyethylene oxide-polyvinyldienefluoride alloy based coating which contains an ether, a plurality of esters, and an alkali metal salt, or a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains at least one ester and an alkali metal salt, or a polyethylene oxide-polyvinyldienefluoride alloy based coating which contains an ether and a plurality of esters, and

at least one layer in contact with said first layer and said cathode, which is an ion conductive polymer layer which contains at least one aprotic liquid, and at least one alkali metal salt, which soaks into and activates the first layer and does not destroy the first layer, or is a polyvinyldienefluoride homopolymer-polyalkylene oxide alloy based coating, or a polyvinyldienefluoride copolymer-polyalkylene oxide alloy based coating, or a polyalkylene oxide based coating which contains at least one ester, and at least one alkali metal salt, or a polyvinyldienefluoride-polyethylene oxide alloy based coating which contains a plurality of esters and an alkali metal salt, or a polyvinyldienefluoride/hexafluorpropylene-polyethylene oxide based coating which contains a plurality of esters and an alkali metal salt, or a polyvinyldienefluoride/polyethylene oxide alloy based coating which contains an ether, at least one ester and an alkali metal salt, or a polymer based coating which contains at least one alkali metal salt, and at least one aprotic liquid selected from a group which does not dissolve or attack polyethylene oxide, or a polyethylene oxide based coating, which contains a plurality of esters and an alkali metal salt, or a polyethylene oxide based coating which contains an ether, at least one ester and an alkali metal salt, or a polyethylene oxide-polyvinyldienefluoride/hexafluoropropylene alloy based coating which contains an ether, at least one ester, and an alkali metal salt.