Lithium electrochemical accumulator having a specific bipolar architecture

Patent metadata

Field	Value
Publication number	US-9331359-B2
Application number	US-201113704643-A
Country	US
Kind code	B2
Filing date	Jun 15, 2011
Priority date	Jun 17, 2010
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one second electrochemical cell separated from each other by a current-collecting substrate, which substrate supports on a first face, an electrode of said first electrochemical cell, and on its second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized inter alia in that said current-collecting substrate is in copper or in copper alloy.

First claim

The invention claimed is:

1. A lithium electrochemical accumulator comprising bipolar architecture comprising at least one first electrochemical cell and at least one second electrochemical cell separated from each other by a current-collecting substrate, which current-collecting substrate supports on a first face an electrode of said first electrochemical cell and on a second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each electrochemical cell comprising a positive electrode and a negative electrode separated by an electrolyte, wherein:
said current-collecting substrate is an integral copper or copper alloy substrate wherein the copper or copper alloy is in contact with each of the electrode supported on the first face and the electrode supported on the second face;
the negative electrode comprises a material selected from:
metal oxide compounds of formula M x O y with M representing an element selected from Ti, Cr, Mn, Fe, Co, Ni, Cu, Mo, W and mixtures thereof, x and y being positive integers selected so that the total charge of the cations compensates for the total charge of the anions so that the compound is electrically neutral;
lithium metal or an alloy comprising lithium metal;
tin metal; and
mixtures thereof; and
the positive electrode comprises a material selected from:
elemental sulfur;
sulfide compounds;
and mixtures thereof.

2. The accumulator according to claim 1 , wherein:
the positive electrode comprises elemental sulfur; and
the negative electrode comprises lithium metal or an alloy comprising lithium metal.

3. The accumulator according to claim 1 , wherein the electrolyte is a liquid electrolyte comprising a lithium salt.

4. The accumulator according to claim 3 , wherein the lithium salt is selected from LiPF 6 , LiClO 4 , LiBF 4 , LiAsF 6 , LiCF 3 SO 3 , LiN(CF 3 SO 2 ) 3 , LiN(C 2 F 5 SO 2 ), lithium bistrifluoromethylsulfonylimide LiN[SO 2 CF 3 ] 2 and mixtures thereof.

5. The accumulator according to claim 3 , wherein the electrolyte comprises one or more solvents from the family of carbonates and/or from the family of ethers.

6. The accumulator according to claim 2 , wherein the electrolyte is a liquid electrolyte comprising a lithium salt.

7. The accumulator according to claim 6 , wherein the electrolyte comprises one or more solvents from the family of carbonates and/or from the family of ethers.

8. The accumulator according to claim 2 , wherein the negative electrode comprises lithium metal.

9. The accumulator according to claim 2 , wherein the negative electrode comprises an alloy comprising lithium metal.

10. The accumulator according to claim 1 , wherein the current-collecting substrate consists of copper.

11. The accumulator according to claim 10 , wherein:
the positive electrode comprises elemental sulfur; and
the negative electrode comprises lithium metal or an alloy comprising lithium metal.

12. The accumulator according to claim 10 , wherein the electrolyte is a liquid electrolyte comprising a lithium salt.

13. The accumulator according to claim 11 , wherein the negative electrode comprises lithium metal.

14. The accumulator according to claim 11 , wherein the negative electrode comprises an alloy comprising lithium metal.

15. The accumulator according to claim 1 , wherein the current-collecting substrate consists of copper alloy.

16. The accumulator according to claim 15 , wherein:
the positive electrode comprises elemental sulfur; and
the negative electrode comprises lithium metal or an alloy comprising lithium metal.

17. The accumulator according to claim 15 , wherein the electrolyte is a liquid electrolyte comprising a lithium salt.

18. The accumulator according to claim 16 , wherein the negative electrode comprises lithium metal.

19. The accumulator according to claim 16 , wherein the negative electrode comprises an alloy comprising lithium metal.

Assignees

• Barchasz Celine
• Chami Marianne
• Martinet Sebastien
• Patoux Sebastien
• Commissariat Energie Atomique

Inventors

• Barchasz Celine
• Chami Marianne
• Martinet Sebastien
• Patoux Sebastien

Classifications

• H01M50/534

  characterised by the material of the leads or tabs · CPC title

• H01M4/387

  Tin or alloys based on tin · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title

• H01M4/581

  Chalcogenides or intercalation compounds thereof · CPC title

• H01M10/0566

  Liquid materials · CPC title