Non-aqueous electrolyte secondary battery and method for producing same

Patent metadata

Field	Value
Publication number	US-10177408-B2
Application number	US-201314761487-A
Country	US
Kind code	B2
Filing date	Nov 13, 2013
Priority date	Jan 23, 2013
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

The non-aqueous electrolyte secondary battery 10 according to the present invention is provided with an electrode body 50 including a positive electrode 64 that contains a positive electrode active material and a negative electrode 84 that contains a negative electrode active material, a non-aqueous electrolyte, and a battery case 15 that houses the electrode body and the non-aqueous electrolyte. The non-aqueous electrolyte contains a complex, which contains copper (I) chloride as a constituent component and which is capable of adsorbing at least carbon monoxide and carbon dioxide, and a coating film that contains at least one of phosphorus and boron is formed on the surface of the negative electrode active material.

First claim

The invention claimed is:

1. A method for producing a non-aqueous electrolyte secondary battery that is provided with: an electrode body including a positive electrode that contains a positive electrode active material, and a negative electrode that contains a negative electrode active material; a non-aqueous electrolyte; and a battery case that houses the electrode body and the non-aqueous electrolyte, the method comprising the steps of:
preparing the positive electrode that contains the positive electrode active material, and the negative electrode that contains the negative electrode active material;
preparing the electrode body using the prepared positive electrode and negative electrode;
preparing an assembly by housing the electrode body in the battery case and introducing, into the battery case, the non-aqueous electrolyte which contains an oxalate complex compound containing at least one of phosphorus and boron as a constituent element, and a complex which contains copper (I) chloride as a constituent component and which is capable of adsorbing at least carbon monoxide and carbon dioxide; and
subjecting the assembly to initial charging until a prescribed charging voltage is reached.

2. The method according to claim 1 , wherein a copper (I) chloride-pyridine complex is used as the complex which contains copper (I) chloride as the constituent component.

3. The method according to claim 1 , wherein the non-aqueous electrolyte further contains a gas generating agent able to generate a gas through decomposition when the battery voltage exceeds a second prescribed voltage, and
the battery case is provided with a current interrupt device that activates when the pressure inside the battery case rises as a result of the gas being generated.

4. The method according to claim 1 , wherein the concentration of the complex which contains copper (I) chloride as the constituent component in the non-aqueous electrolyte is 16 mol/L to 56 mol/L relative to 1 mol/L of the oxalate complex compound.

5. The method according to claim 1 , wherein the concentration of the oxalate complex compound in the non-aqueous electrolyte is 0.02 mol/L to 0.04 mol/L.

6. The method according to claim 1 , wherein LiPF 2 (C 2 O 4 ) 2 is used as the oxalate complex compound.

Assignees

• Toyota Motor Co Ltd

Inventors

• Mitsuhashi Toshihiko

Classifications

• H01M4/366

  as layered products · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• H01M10/0525

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

• Y02P70/54

  Cross-Sectional Technologies · mapped topic