Mixed polymer electrolyte and mixed polymer electrolyte battery

• US 5,166,009 A
• Filed: 03/28/1991
• Issued: 11/24/1992
• Est. Priority Date: 03/28/1991
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Alamgir, Mohamed, Abraham, Kuzhikalail M.
• Primary Examiner(s): KALAFUT, STEPHEN J
• Application Number:
  US07/676,507
• Time in Patent Office: 607 Days
• Field of Search: 429/192, 252/62.2
• US Class Current: 429/312
• 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 mixed polymer electrolyte and a solid rechargeable battery which uses a solid mixed polymer electrolyte of poly[bis(methoxyethoxyethoxide)phosphazene].

Claims

1. A mixed polymer electrolyte with a composition MEEP/PPO-(LiX)_n where MEEP represents POLY [BiS-METHOXYETHOXYETHOXIDE) PHOSPHAZENE, PPO represents POLY (PROPYLENE OXIDE) and LiX represents a lithium salt.

2. The electrolyte of claim 1 in which LiX is LiBF₄, LiClO₄, LiCF₃ SO₃, LiAsF₆ or LiAlCl₄.

3. The electrolyte of claim 2 in which the ratio of the polymers MEEP and PPO varies between 80/20 and 55/45.

4. The electrolyte of claim 3 in which the Li salt concentration (Li+)/(0) varies between 0.05 and 0.30.

5. The electrolyte of claim 1 in which LiX is LiBF₄ or LiClO₄.

6. The electrolyte of claim 5 in which the ratio of the polymers MEEP and PPO varies between 80/20 and 55/45.

7. The electrolyte of claim 6 is which the Li salt concentration varies between 0.05 and 0.30.

8. The electrolyte of claim 5 in which the ratio of the polymers MEEP and PPO is about 55/45 and the Li salt concentration is between 0.1 and 0.2.

9. A mixed polymer solid electrolyte battery comprising a positive electrode, a negative electrode and a mixed polymer solid electrolyte of MEEP/PPO-(LiBF₄) or MEEP/PPO-(LiClO₄).

10. The battery of claim 9 in which the ratio of the polymers MEEP and PPO is about 55/45 and the Li salt concentration is between 0.1 and 0.2.

11. The battery of claim 10 in which the positive electrode is lithium and the negative electrode is a metal sulfide.

12. The battery of claim 11 in which the negative electrode is TiS₂.