Production method of negative electrode active material for nonaqueous electrolyte secondary battery, production method of nonaqueous electrolyte secondary battery, production method of negative electrode for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-10637053-B2
Application number	US-201615759334-A
Country	US
Kind code	B2
Filing date	Aug 29, 2016
Priority date	Sep 10, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A production method of a negative electrode active material containing a silicon compound (SiO x : 0.5≤x≤1.6) that contains Lithium includes: making a silicon compound into which the lithium has been inserted contact with a solution B containing a polycyclic aromatic compound or a derivative thereof or both thereof (here, the solution B contains one or more kinds selected from an ether-based solvent, a ketone-based solvent, an ester-based solvent, an alcohol-based solvent, and an amine-based solvent as a solvent); and making the silicon compound contact with a solution C (here, the solution C contains one or more kinds selected from an ether-based material, a ketone-based material, and an ester-based material as the solvent, and contains a compound having a quinoid structure in a molecule as a solute).

First claim

The invention claimed is:

1. A production method of a negative electrode active material for nonaqueous electrolyte secondary batteries, the method comprising:
preparing a silicon compound SiO x , wherein 0.5≤x≤1.6;
inserting lithium into the silicon compound;
making the silicon compound into which the lithium has been inserted contact with a solution B containing:
a polycyclic aromatic compound, a derivative thereof, or both; and
one or more solvents selected from an ether-based solvent, a ketone-based solvent, an ester-based solvent, an alcohol-based solvent, and an amine-based solvent; and

making the silicon compound that has been contacted with the solution B contact with a solution C containing:
one or more solvents selected from an ether-based material, a ketone-based material, and an ester-based material; and
a compound having a quinoid structure in a molecule as a solute.

2. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 1 , wherein in the making the silicon compound contact with the solution B, the silicon compound is contacted with the solution B for 3 minutes or more.

3. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 1 , wherein in the inserting lithium, the silicon compound is contacted with a solution A containing the lithium and the ether-based solvent for 3 minutes or more to insert the lithium into the silicon compound.

4. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 2 , wherein in the inserting lithium, the silicon compound is contacted with a solution A containing the lithium and the ether-based solvent for 3 minutes or more to insert the lithium into the silicon compound.

5. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 3 , wherein the solution A containing the lithium is:
a solution A 1 containing the lithium, the ether-based solvent, and a polycyclic aromatic compound or its derivative or a straight chain polyphenylene compound or its derivative, or
a solution A 2 containing the lithium, the ether-based solvent, and amines.

6. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 4 , wherein the solution A containing the lithium is:
a solution A 1 containing the lithium, the ether-based solvent, and a polycyclic aromatic compound or its derivative or a straight chain polyphenylene compound or its derivative, or
a solution A 2 containing the lithium, the ether-based solvent, and amines.

7. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 5 , wherein, as the solution A containing the lithium, the solution A 1 is used.

8. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 6 , wherein, as the solution A containing the lithium, the solution A 1 is used.

9. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 5 , wherein as the solution A 1 containing the lithium, a solution containing the lithium, the ether-based solvent, and the straight chain polyphenylene compound or its derivative is used.

10. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 6 , wherein as the solution A 1 containing the lithium, a solution containing the lithium, the ether-based solvent, and the straight chain polyphenylene compound or its derivative is used.

11. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 7 , wherein as the solution A 1 containing the lithium, a solution containing the lithium, the ether-based solvent, and the straight chain polyphenylene compound or its derivative is used.

12. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 8 , wherein as the solution A 1 containing the lithium, a solution containing the lithium, the ether-based solvent, and the straight chain polyphenylene compound or its derivative is used.

13. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 7 , wherein one or more kinds of naphthalene, anthracene, phenanthrene, naphthacene, pentacene, pyrene, picene, triphenylene, coronene, chrysene, and derivatives thereof as the polycyclic aromatic compound, or one or more kinds of biphenyl, terphenyl, and derivatives thereof are used as the straight chain polyphenylene compound.

14. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 8 , wherein one or more kinds of naphthalene, anthracene, phenanthrene, naphthacene, pentacene, pyrene, picene, triphenylene, coronene, chrysene, and derivatives thereof are used as the polycyclic aromatic compound, or one or more kinds of biphenyl, terphenyl, and derivatives thereof are used as the straight chain polyphenylene compound.

15. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 1 , wherein the compound having a quinoid structure in a molecule is selected from benzoquinone, quinodimethane, quinodiimine, and derivatives thereof.

16. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 2 , wherein the compound having a quinoid structure in a molecule is selected from benzoquinone, quinodimethane, quinodiimine, and derivatives thereof.

17. The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 1 , further comprising:
before the inserting lithium, forming an electrode containing the silicon compound, wherein to the silicon compound contained in the electrode, the inserting the lithium, the making contact with the solution B, and the making contact with the solution C are applied.

18. A production method of a nonaqueous electrolyte secondary battery comprising:
producing a negative electrode active material for nonaqueous electrolyte secondary batteries according to the production method of a negative electrode active material for secondary batteries according to claim 1 ; and
producing a nonaqueous electrolyte secondary battery using an electrode containing the negative electrode active material for nonaqueous electrolyte secondary batteries.

19. A production method of a negative electrode for nonaqueous electrolyte secondary batteries, the method comprising:
forming an electrode containing a silicon compound SiO x , wherein 0.5≤x≤1.6;
inserting the lithium into the silicon compound contained in the electrode;
making the electrode containing the silicon compound into which the lithium has been inserted contact with a solution B to make the solution B contact with the silicon compound, the solution B containing:
a polycyclic aromatic compound, its derivative, or both; and
one or more solvents selected from an ether-based solvent, a ketone-based solvent, an ester-based solvent, an alcohol-based solvent, and an amine-based solvent;

Assignees

• Shinetsu Chemical Co
• Mitsui Chemicals Inc

Inventors

• KAMO Hiromichi
• Hirose Takakazu
• Nishiura Katsunori
• Onishi Hitoshi

Classifications

• H01M4/483 Primary

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title

• H01M4/48

  of inorganic oxides or hydroxides · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M10/0525

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

• H01M4/0459

  Electrochemical doping, intercalation, occlusion or alloying · CPC title