Positive electrode mix

Patent metadata

Field	Value
Publication number	US-9859562-B2
Application number	US-201314411649-A
Country	US
Kind code	B2
Filing date	Jun 25, 2013
Priority date	Jun 29, 2012
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A positive electrode mix including a solid electrolyte and a sulfur-based active material, wherein the solid electrolyte comprises a Li element or a Na element; a S element; and a halogen element selected from the group consisting of I, Br, Cl and F.

First claim

The invention claimed is:

1. A positive electrode mix comprising a solid electrolyte and a sulfur-based active material,
wherein the solid electrolyte comprises a Li element or a Na element; a S element; a P element; and a halogen element selected from the group consisting of I, Br, Cl and F,
the solid electrolyte has, in a 31 P-NMR spectrum, a first peak in a first peak range of 75.0 ppm or more and 80.0 ppm or less, and
a ratio of the intensity of a peak which is in a range other than the first peak range and an optional second peak range of 86.0 ppm or more and 92.0 ppm or less relative to the intensity of the first peak is 0.5 or less.

2. The positive electrode mix according to claim 1 , wherein the solid electrolyte comprises a crystalline component.

3. The positive electrode mix according to claim 1 , wherein, in the 31 P-NMR spectrum, the solid electrolyte has a peak in the first peak range and the second peak range, respectively.

4. The positive electrode mix according to claim 1 , wherein the peak intensity ratio (I 2 /I 1 ) of the intensity of a second peak (I 2 ) in the second peak range relative to the intensity of the first peak (I 1 ) is 1 or more and 10 or less.

5. The positive electrode mix according to claim 4 , wherein the halogen element is selected from the group consisting of I, Br and Cl.

6. The positive electrode mix according to claim 5 , wherein the sulfur-based active material is a single substance of sulfur or lithium sulfide.

7. The positive electrode mix according to claim 6 , comprising a conductive material that comprises fine pores,
wherein the conductive material is carbon,
the fine pore capacity of the conductive material is 0.1 cc/g or more and 5.0 cc/g or less, and
the average diameter of the fine pores is 0.1 nm or more and 100 nm or less.

8. The positive electrode mix according to claim 4 , wherein the sulfur-based active material is a single substance of sulfur or lithium sulfide.

9. The positive electrode mix according to claim 1 , wherein the halogen element is selected from the group consisting of I, Br and Cl.

10. The positive electrode mix according to claim 1 , wherein the sulfur-based active material is a single substance of sulfur or lithium sulfide.

11. The positive electrode mix according to claim 1 , wherein the solid electrolyte contains a crystalline component,
in the 31 P-NMR spectrum, the solid electrolyte has a peak in the first peak range and the second peak range, respectively, and
the halogen element is selected from the group consisting of I, Br and Cl.

12. The positive electrode mix according to claim 1 , wherein the solid electrolyte contains a crystalline component,
in the 31 P-NMR spectrum, the solid electrolyte has a peak in the first peak range and the second peak range, respectively, and
the sulfur-based active material is a single substance of sulfur or lithium sulfide.

13. The positive electrode mix according to claim 1 , wherein the solid electrolyte is glass ceramic.

14. The positive electrode mix according to claim 13 , wherein the solid electrolyte is selected from the group consisting of Li 2 S/P 2 S 5 /LiI and Li 2 S/P 2 S 5 /LiBr.

15. A positive electrode comprising the positive electrode mix according to claim 5 .

16. A lithium ion battery comprising the positive electrode according to claim 15 .

Assignees

• Idemitsu Kosan Co

Inventors

• Koshika Hiromichi
• Higuchi Hiroyuki
• Kambara Takayoshi

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/13

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

• H01M4/405

  Alloys based on lithium · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title