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-2018254480-A1
Application number	US-201615759334-A
Country	US
Kind code	A1
Filing date	Aug 29, 2016
Priority date	Sep 10, 2015
Publication date	Sep 6, 2018
Grant date	—

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

1 - 12 . (canceled)

13 . A production method of a negative electrode active material for nonaqueous electrolyte secondary batteries containing a silicon compound (SiO x : 0.5≤x≤1.6) that contains lithium, comprising:
preparing a silicon compound (SiO x : 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 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 that has been contacted with the solution B 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.).

14 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 13 , 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.

15 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 13 , wherein in the inserting lithium, the silicon compound is contacted with a solution A containing the lithium (here, the solution A has the ether-based solvent as the solvent) for 3 minutes or more to insert the lithium into the silicon compound.

16 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 14 , wherein in the inserting lithium, the silicon compound is contacted with a solution A containing the lithium (here, the solution A has the ether-based solvent as the solvent) for 3 minutes or more to insert the lithium into the silicon compound.

17 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 15 , wherein as the solution A containing the lithium, a solution A 1 containing the lithium 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 and amines (here, the solution A 1 and solution A 2 each contains the ether-based solvent as the solvent) is used.

18 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 16 , wherein as the solution A containing the lithium, a solution A 1 containing the lithium 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 and amines (here, the solution A 1 and solution A 2 each contains the ether-based solvent as the solvent) is used.

19 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 17 , wherein, as the solution A containing the lithium, the solution A 1 is used.

20 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 18 , wherein, as the solution A containing the lithium, the solution A 1 is used.

21 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 17 , wherein as the solution A 1 containing the lithium, a solution containing the lithium and the straight chain polyphenylene compound or its derivative is used.

22 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 18 , wherein as the solution A 1 containing the lithium, a solution containing the lithium and the straight chain polyphenylene compound or its derivative is used.

23 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 19 , wherein as the solution A 1 containing the lithium, a solution containing the lithium and the straight chain polyphenylene compound or its derivative is used.

24 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 20 , wherein as the solution A 1 containing the lithium, a solution containing the lithium and the straight chain polyphenylene compound or its derivative is used.

25 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 13 , 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, and one or more kinds of biphenyl, terphenyl, and derivative thereof are used as the straight chain polyphenylene compound.

26 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 14 , 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, and one or more kinds of biphenyl, terphenyl, and derivative thereof are used as the straight chain polyphenylene compound.

27 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 13 , wherein the compound having a quinoid structure in a molecule is benzoquinone, quinodimethane, quinodiimine, or derivatives thereof.

28 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 14 , wherein the compound having a quinoid structure in a molecule is benzoquinone, quinodimethane, quinodiimine, or derivatives thereof.

29 . The production method of a negative electrode active material for nonaqueous electrolyte secondary batteries according to claim 13 , 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.

30 . 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 13 ; and producing a nonaqueous electrolyte secondary battery using an electrode containing the negative electrode active material for nonaqueous electrolyte secondary batteries.

31 . A production method of a negative electrode for nonaqueous electrolyte secondary batteries containing a negative electrode active material containing a silicon compound SiO x (0.5≤x≤1.6) containing lithium, comprising:
forming an electrode containing the silicon compound SiO x (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 lit

Assignees

• Shinetsu Chemical Co
• Mitsui Chemicals Inc

Inventors

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

Classifications

• C01B33/32

  Alkali metal silicates ({C01B33/24} , C01B33/26 take precedence) · CPC title

• C01B33/113

  Silicon oxides; Hydrates thereof {(preparing monoxide by reduction of siliceous material C01B33/182)} · CPC title

• H01M4/485 Primary

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

• H01M4/48

  of inorganic oxides or hydroxides · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title