Apparatus, secondary battery, manufacturing method, and electronic device

Patent metadata

Field	Value
Publication number	US-2016248077-A1
Application number	US-201615046877-A
Country	US
Kind code	A1
Filing date	Feb 18, 2016
Priority date	Feb 24, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A lithium-ion secondary battery having stable charge characteristics and lifetime characteristics is manufactured. Before the secondary battery is completed, a positive electrode is subjected to an electrochemical reaction in a large amount of electrolyte solution in advance, so that the positive electrode can have stability. The use of the positive electrode enables the secondary battery to be highly reliable. If a negative electrode is also subjected to an electrochemical reaction in a large amount of electrolyte solution in advance, the secondary battery can be more highly reliable.

First claim

What is claimed is:

1 . An apparatus comprising:
a container; an electrolyte solution in the container, the electrolyte solution comprising lithium and an alkali metal element other than lithium; a first electrode; a second electrode; a third electrode; and a control unit configured to apply potentials to the first electrode, the second electrode and the third electrode, wherein the first electrode, the second electrode, and the third electrode are positioned in the electrolyte solution so as to be separated from each other.

2 . The apparatus according to claim 1 , wherein the third electrode comprises an active material particle comprising lithium.

3 . The apparatus according to claim 2 , wherein the active material particle is a positive electrode active material particle.

4 . The apparatus according to claim 1 , wherein the first electrode comprises a metal of the alkali metal element.

5 . The apparatus according to claim 2 , wherein the electrolyte solution comprises lithium ions and ions of the alkali metal element.

6 . A secondary battery comprising an electrode manufactured using the apparatus according to claim 1 .

7 . An electronic device comprising:
the secondary battery according to claim 6 ; and an antenna, an operation switch, a microphone or a speaker.

8 . A manufacturing method of an electrode, comprising the steps of:
putting a first electrode, a second electrode and a third electrode in an electrolyte solution; applying a first potential to the first electrode in the electrolyte solution; and applying a second potential to the second electrode and a third potential to the third electrode after applying the first potential to the first electrode, wherein the electrolyte solution comprises lithium and an alkali metal element other than lithium, wherein the first potential is higher than or equal to a lithium equilibrium potential and lower than an equilibrium potential of the alkali metal element, and wherein the second potential is lower than the third potential.

9 . The manufacturing method, according to claim 8 , wherein the alkali metal element is sodium or potassium.

10 . The manufacturing method according to claim 8 ,
wherein the first electrode comprises the alkali metal element, and wherein the second electrode comprises a lithium metal.

11 . The manufacturing method according to claim 8 , wherein the third electrode comprises an active material particle.

12 . The manufacturing method according to claim 11 , wherein the active material particle is a positive electrode active material particle.

13 . The manufacturing method according to claim 8 , wherein a metal of the alkali metal element is deposited during the application of the first potential.

14 . The manufacturing method according to claim 8 ,
wherein a lithium metal is deposited during the application of the second potential and the third potential, and wherein current flows from the second electrode to the third electrode during the application of the second potential and the third potential.

15 . The manufacturing method according to claim 8 , wherein current flows from the first electrode to the second electrode during the application of the first potential.

16 . The manufacturing method according to claim 8 ,
wherein the alkali metal element is deposited on a surface of the first electrode during the application of the first potential, and wherein the alkali metal element deposited on the surface of the first electrode reacts with an impurity during the application of the second potential and the third potential.

17 . A manufacturing method of a secondary battery, comprising the steps of:
putting a first electrode, a second electrode and a third electrode in a first electrolyte solution, the third electrode comprising a positive electrode active material layer or a negative electrode active material layer; applying a first potential to the first electrode; applying a second potential to the second electrode and a third potential to the third electrode in the first electrolyte solution to cause an electrochemical reaction after applying the first potential; packing a stack including the third electrode and a fourth electrode in a region surrounded by an exterior body having an opening after applying the second potential and the third potential; putting a second electrolyte solution into the region surrounded by the exterior body after packing the stack; and closing the opening of the exterior body after putting the second electrolyte solution, wherein the fourth electrode comprises an active material layer, and wherein the first electrolyte solution comprises lithium and an alkali metal element other than lithium.

18 . The manufacturing method according to claim 17 , wherein the fourth electrode comprises a negative electrode active material.

19 . The manufacturing method according to claim 17 ,
wherein the alkali metal element is deposited on a surface of the first electrode during the application of the first potential, and wherein the alkali metal element deposited on the surface of the first electrode reacts with an impurity during the application of the second potential and the third potential.

20 . The manufacturing method according to claim 17 ,
wherein a lithium metal is deposited during the application of the second potential and the third potential, and wherein current flows from the second electrode to the third electrode during the application of the second potential and the third potential.

Assignees

• Semiconductor Energy Lab

Inventors

• Momo Junpei
• Momma Yohei

Classifications

• H01M4/48

  of inorganic oxides or hydroxides · CPC title

• H01M10/42

  Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) · CPC title

• H01M4/0452 Primary

  from solutions · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title