Electrochemical energy storage device

Patent metadata

Field	Value
Publication number	US-9742035-B2
Application number	US-201615018317-A
Country	US
Kind code	B2
Filing date	Feb 8, 2016
Priority date	Mar 26, 2015
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

An exemplary electrochemical energy storage device includes: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a non-aqueous electrolytic solution. The non-aqueous electrolytic solution includes an electrolyte salt represented by Li(XSO 2 NSO 2 Y) (where X and Y are any of F, C n F 2n+1 and (CF 2 ) m , and (CF 2 ) m forms a cyclic imide anion), an organic solvent which is capable of dissolving the electrolyte salt, and a polyethylene glycol of which both terminals are not OH. The positive electrode active material includes a chloride of Cu, Bi or Ag, and the negative electrode active material includes lithium.

First claim

What is claimed is:

1. An electrochemical energy storage device, comprising:
a positive electrode including a positive electrode active material;
a negative electrode including a negative electrode active material; and
a non-aqueous electrolytic solution including an electrolyte salt represented by Li(XSO 2 NSO 2 Y) (where X and Y are any of F, C n F 2n+1 and (CF 2 ) m , and (CF 2 ) m forms a cyclic imide anion), an organic solvent which is capable of dissolving the electrolyte salt, and a polyethylene glycol of which both terminals are not OH, the non-aqueous electrolytic solution being in contact with the positive electrode and the negative electrode,
wherein the positive electrode active material includes a chloride of Cu, Bi or Ag, and the negative electrode active material includes lithium, and
the non-aqueous electrolytic solution is a single-phase solution when it is at a normal temperature and includes the electrolyte salt in a proportion exceeding a solubility of the electrolyte salt in the organic solvent.

2. The electrochemical energy storage device of claim 1 , wherein the organic solvent is tetrahydrofuran.

3. The electrochemical energy storage device of claim 1 , wherein the organic solvent is propylene carbonate.

4. The electrochemical energy storage device of claim 1 , wherein the positive electrode active material includes CuCl 2 , CuCl, BiCl 3 , or AgCl.

5. The electrochemical energy storage device of claim 1 , wherein the positive electrode includes LiCl when the electrochemical energy storage device is in a charged state.

6. The electrochemical energy storage device of claim 1 , wherein the negative electrode active material is a lithium metal.

7. The electrochemical energy storage device of claim 1 , wherein the negative electrode active material is a mixture of a magnesium metal and lithium chloride or an alloy of lithium and magnesium.

8. The electrochemical energy storage device of claim 7 , wherein the magnesium metal and the alloy of lithium and magnesium are produced by charging of a battery in which a magnesium compound is used in a negative electrode.

9. The electrochemical energy storage device of claim 8 , wherein the magnesium compound is magnesium chloride.

Assignees

• Panasonic Corp
• Univ Kyoto

Inventors

• Matsui Toru
• Nakata Akiyoshi
• Hirai Toshiro
• Yamaki Jun-Ichi
• Ogumi Zempachi

Classifications

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0567

  characterised by the additives · CPC title

• H01M4/405

  Alloys based on lithium · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title