SECONDARY BATTERY, BATTERY PACK, AND VEHICLE

• US 20180083321A1
• Filed: 02/28/2017
• Published: 03/22/2018
• Est. Priority Date: 09/16/2016
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: HOTTA, Yasuyuki, Matsuno, Shinsuke, Takami, Norio
• Granted Patent: US 10,461,370 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/36 Accumulators not provided for in groups H01M10/05-H01M10/34
• CPC Class Codes: H01M 10/4235 Safety or regulating additives or arrangements in electrodes, separators or electrolyte H01M10/4242 takes precedence
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 2300/0002 Aqueous electrolytes
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: H01M 50/211 adapted for pouch cells
• CPC Class Codes: H01M 50/296 characterised by terminals of battery packs terminals of batteries H01M50/543
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The electrolyte contains a water-containing solvent and a nitrogen atom-containing organic sulfur compound. The concentration of the nitrogen atom-containing organic sulfur compound in the electrolyte is within a range of from 0.001 mM to 20 mM.

Claims

1. A secondary battery comprising:

a positive electrode;

a negative electrode; and

an electrolyte,

wherein the electrolyte comprises a water-containing solvent, an electrolyte salt, and a nitrogen atom-containing organic sulfur compound, and

a concentration of the nitrogen atom-containing organic sulfur compound in the electrolyte is within a range of from 0.001 mM to 20 mM.

2. The secondary battery according to claim 1, wherein the nitrogen atom-containing organic sulfur compound comprises at least one selected from the group consisting of a sulfide compound and a sulfimide compound.

3. The secondary battery according to claim 1, wherein the nitrogen atom-containing organic sulfur compound is at least one selected from the group consisting of saccharin sodium salt, thiourea, and sodium mercapto benzothiazole propane sulfonate.

4. The secondary battery according to claim 1, wherein the electrolyte salt comprises a lithium salt and a concentration of the lithium salt in the electrolyte is within a range of from 3 M to 10 M.

5. The secondary battery according to claim 4, wherein the lithium salt is lithium chloride.

6. The secondary battery according to claim 1, wherein the negative electrode has a specific surface area of from 3 m²/g to 50 m²/g.

7. The secondary battery according to claim 1, wherein the negative electrode comprises at least one selected from the group consisting of a titanium oxide and a lithium titanium oxide as a negative electrode active material.

8. The secondary battery according to claim 1, wherein the positive electrode comprises at least one selected from the group consisting of a lithium cobalt composite oxide, a lithium manganese composite oxide, and a lithium phosphate compound having an olivine structure as a positive electrode active material.

9. A battery pack comprising the secondary battery according to claim 1.

10. The battery pack according to claim 9, further comprising:

an external power distribution terminal; and

a protective circuit.

11. The battery pack according to claim 9, comprising a plural of the secondary batteries, wherein the secondary batteries are electrically connected in series, in parallel, or in a combination of in series and in parallel.

12. A vehicle comprising the battery pack according to claim 9.

13. The vehicle according to claim 12, wherein the battery pack is configured to recover a regenerative energy caused by power of the vehicle.