Ionically conductive material

• US 4,851,307 A
• Filed: 10/30/1987
• Issued: 07/25/1989
• Est. Priority Date: 10/30/1986
• Status: Expired due to Term

• Current Assignee: Societe Nationale Elf Aquitaine (Cook Composites and Polymers), Hydro-Quebec (Province of Québec)
• Original Assignee: Societe Nationale Elf Aquitaine (Cook Composites and Polymers), Hydro-Quebec (Province of Québec)
• Inventors: Armand, Michel, Gauthier, Michel, Muller, Daniel
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/114,721
• Time in Patent Office: 634 Days
• Field of Search: 429/192, 429/194
• US Class Current: 429/307
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01M 6/164 by the solvent
• CPC Class Codes: H01M 6/166 by the solute
• CPC Class Codes: H01M 6/181 with polymeric electrolytes

Abstract

An ionically conductive material useful in electrochemical generators is disclosed. This ionically material comprises a salt in solution in a solvent. The solvent comprises a sulfonated derivative of Formula (I):

R.sub.1 R.sub.2 N--SO.sub.2 NR.sub.3 R.sub.4

wherein R₁, R₂, R₃ and R₄ are each independently a C_1-10 alkyl group or a C_1-10 oxaalkyl group.

Claims

1. An ionically conductive material comprising a salt in solution in a solvent, wherein said solvent comprises (1) a sulfonated derivative of formula (I):

space="preserve" listing-type="equation">R.sub.1 R.sub.2 N--SO.sub.2 --NR.sub.3 R.sub.4

wherein R₁, R₂, R₃ and R₄ are each independently a C_1-10 alkyl group or a C_1-10 oxaalkyl group, and (2) a macromolecular material.

2. The material of claim 1, wherein R₁ and R₂ are each a methyl group.

3. The material of claim 2, wherein R₃ and R₄ are each an ethyl group.

4. The material of claim 1, wherein R₁, R₂, R₃ and R₄ are each an ethyl group.

5. The material of claim 1, wherein said salt is a metallic salt.

6. The material of claim 5, wherein said metallic salt is the salt of a strong acid.

7. The material of claim 1, wherein said macromolecular material is a homopolymer or a copolymer derived from monomeric units containing at least one oxygen atom or one nitrogen atom per monomer unit.

8. The material of claim 7, wherein said monomeric units contain at least one oxygen atom or at least one nitrogen atom for each four carbon atoms contained in said monomeric unit.

9. The material of claim 7, wherein said material is solid.

10. The material of claim 9, wherein said material is amorphous at temperatures of at least 10°

C.

11. The material of claim 1, wherein said salt is a metallic salt which is one member selected from the group consisting of sulfonated derivatives represented by the formula M[RF--SO₂ --A--SO₂ --R'"'"'F], ##STR10## wherein M is a metal selected from the group consisting of alkali metals, alkaline-earth metals, transition metals and rare earth metals, QF is a C_2-6 divalent radical or a perfluorinated C_2-6 divalent radical, RF and R'"'"'F can be different or identical and each represents a radical selected from the group consisting of C_1-12 alkyl groups, C_6-12 aryl groups, perhalogenated C_1-12 alkyl groups, and perhalogenated C_6-12 aryl groups, and A represents a nitrogen atom or a group CR in which R is hydrogen or a C_1-20 alkyl group.

12. The material of claim 11, wherein RF and R'"'"'F are each independently a perflurointed C_1-12 alkyl group or a perfluorinated C_6-12 aryl group.

13. The material of claim 1, wherein said salt is LiClO₄ or (CF₃ SO₂)₂ NLi.

14. In an electrochemical generator, the improvement comprising using an ionically conductive material comprising a salt in solution in a solvent, wherein said solvent comprises (1) a sulfonated derivative of Formula (I):

space="preserve" listing-type="equation">R.sub.1 R.sub.2 N--SO.sub.2 --NR.sub.3 R.sub.4

wherein R₁, R₂, R₃ and R₄ are each independently a C_1-10 alkyl group or a C_1-10 oxaalkyl group, and (2) a macromolecular material.

15. The electrochemical generator of claim 14, wherein R₁ and R₂ are each a methyl group.

16. The electrochemical generator of claim 15, wherein R₃ and R₄ are each an ethyl group.

17. The electrochemical generator of claim 14, wherein R₁, R₂, R₃ and R₄ are each an ethyl group.

18. The electrochemical generator of claim 14, wherein said salt is a metallic salt.

19. The electrochemical generator of claim 14, wherein said macromolecular material is either a homopolymer or a copolymer derived from monomeric units containing at least one oxygen atom or one nitrogen atom per monomer unit.

20. The electrochemical generator of claim 19, wherein said monomeric unit contains at least one oxygen atom or one nitrogen atom for each four carbon atoms in said monomeric unit.

21. The electrochemical generator of claim 14, wherein said salt is a metallic salt selected from the group consisting of the sulfonated derivatives of the formula M[RF--SO₂ --A--SO₂ --R'"'"'F], ##STR11## wherein M is a metal selected from the group consisting of alkali metals, alkaline-earth metals, transition metals and rare earth metals, QF is a C_2-6 divalent radical or a perfluorinated C_2-6 divalent radical, RF and R'"'"'F can be different or identical and each represents a radical selected from the group consisting of C_1-12 alkyl groups, C_6-12 aryl groups, perhalogenated C_1-12 alkyl groups, and perhalogenated C_6-12 aryl groups, and A represents a nitrogen atom or a group CR in which R is H or a C_1-20 alkyl radical.

22. The electrochemical generator of claim 21, wherein said RF and R'"'"'F are each independently a perfluorinated C_1-12 alkyl group or a perfluorinated C_6-12 aryl group.

23. The electrochemical generator of claim 14, wherein said salt is LiClO₄ or (CF₃ SO₂)₂ NLi.