Nonaqueous electrolyte battery inorganic particles and nonaqueous electrolyte battery

Patent metadata

Field	Value
Publication number	US-10680291-B2
Application number	US-201716079575-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Feb 25, 2016
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

The nonaqueous electrolyte battery inorganic particles according to the present invention include a metal element having a smaller electronegativity than manganese in a crystal structure, and comprise a laminar compound which has an interlayer distance of 0.40-2.0 nm or less and which has exchangeable cations other than hydrogen ions between the layers.

First claim

The invention claimed is:

1. An inorganic particle for a nonaqueous electrolyte battery, comprising:
a layered compound comprising a metal element having an electronegativity smaller than manganese in a crystal structure of the compound, having an interlayer distance of from 0.40 nm to 2.0 nm and including an exchangeable cation other than a hydrogen ion between layers of the compound, wherein the BET specific surface area of the inorganic particle is 3 m 2 /g or more.

2. The inorganic particle for a nonaqueous electrolyte battery according to claim 1 , wherein the exchangeable cation is selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion, an organic cation, and any mixture thereof.

3. The inorganic particle for a nonaqueous electrolyte battery according to claim 1 , wherein an adsorption rate of Mn 2+ ions is 5% or more, when 0.035 parts by weight of the inorganic particle is immersed in 100 parts by weight of a mixed liquid of 5 ppm of Mn 2+ ion, 1 mol/L of LiPF 6 , and a cyclic and/or linear carbonate in an atmosphere at 23° C. for 6 hours.

4. The inorganic particle for a nonaqueous electrolyte battery according to claim 1 , wherein an HF concentration is less than 10 ppm, when 8 parts by weight of the inorganic particle is immersed in 100 parts by weight of a mixed liquid of 800 ppm of HF, 1 mol/L of LiPF 6 , and a cyclic and/or linear carbonate in an atmosphere at 23° C. for 5 min.

5. The inorganic particle for a nonaqueous electrolyte battery according to claim 1 , wherein the metal element constituting the inorganic particle and having an electronegativity smaller than manganese is an element of an alkali metal or an alkaline earth metal.

6. The inorganic particle for a nonaqueous electrolyte battery according to claim 5 , wherein the inorganic particle is calcium silicate hydrate.

7. A battery constituent material comprising the inorganic particle for a nonaqueous electrolyte battery according to claim 1 .

8. A nonaqueous electrolyte battery provided with an adsorptive layer comprising the inorganic particle for a nonaqueous electrolyte battery according to claim 1 .

9. The nonaqueous electrolyte battery according to claim 8 comprising a positive electrode, a negative electrode, and a separator as battery constituent materials, wherein the adsorptive layer is formed at least inside the separator, on facing surfaces of the positive electrode and the separator, or on facing surfaces of the negative electrode and the separator, and the formed adsorptive layer is formed entirely or partially inside the separator, or entirely or partially on any of the respective facing surfaces.

10. A mixture of inorganic particles for a nonaqueous electrolyte battery, comprising a first inorganic particle and a second inorganic particle,
wherein the first inorganic particle comprises a layered compound comprising a metal element having an electronegativity smaller than manganese in a crystal structure of the compound, having an interlayer distance of from 0.40 nm to 2.0 nm and including an exchangeable cation between layers of the compound,
wherein the second inorganic particle has an average particle diameter larger than the average particle diameter of the first inorganic particle, and wherein the BET specific surface area of the first inorganic particle is 3 m 2 /g or more.

11. The mixture of inorganic particles for a nonaqueous electrolyte battery according to claim 10 , wherein the average particle diameter of the first inorganic particle is from 0.01 μm to 2 μm, and the average particle diameter of the second inorganic particle is from 0.1 μm to 3 μm.

12. The mixture of inorganic particles for a nonaqueous electrolyte battery according to claim 10 , wherein the shape of the second inorganic particle is plate-like.

13. The mixture of inorganic particles for a nonaqueous electrolyte battery according to claim 10 , wherein with respect to the first inorganic particle, an adsorption rate of Mn 2+ ions is 5% or more, when 0.035 parts by weight of the inorganic particle is immersed in 100 parts by weight of a mixed liquid of 5 ppm of Mn 2+ ion, 1 mol/L of LiPF 6 , and a cyclic and/or linear carbonate in an atmosphere at 23° C. for 6 hours.

14. The mixture of inorganic particles for a nonaqueous electrolyte battery according to claim 10 , wherein with respect to the first inorganic particle, an HF concentration is less than 10 ppm, when 8 parts by weight of the inorganic particle is immersed in 100 parts by weight of a mixed liquid of 800 ppm of HF, 1 mol/L of LiPF 6 , and a cyclic and/or linear carbonate in an atmosphere at 23° C. for 5 minutes.

15. A battery constituent material comprising the mixture of inorganic particles for a nonaqueous electrolyte battery according to claim 10 .

16. A nonaqueous electrolyte battery provided with an adsorptive layer comprising the mixture of inorganic particles for a nonaqueous electrolyte battery according to claim 10 .

17. The nonaqueous electrolyte battery according to claim 16 comprising a positive electrode, a negative electrode, and a separator as battery constituent materials, wherein the adsorptive layer is formed at least inside the separator, on facing surfaces of the positive electrode and the separator, or on facing surfaces of the negative electrode and the separator, and the formed adsorptive layer is formed entirely or partially inside the separator, or entirely or partially on any of the respective facing surfaces.

Assignees

• Asahi Chemical Ind

Inventors

• Saeki Hiroyuki
• Ito Nobuhiro
• Ishii Yoshiyuki
• Matsui Kunio

Classifications

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic

• H01M10/052

  Li-accumulators · CPC title

• H01M2/02

  Electricity · mapped topic

• Y02E60/122

  Cross-Sectional Technologies · mapped topic