SECONDARY BATTERY, BATTERY PACK, AND VEHICLE

• US 20170271717A1
• Filed: 03/13/2017
• Published: 09/21/2017
• Est. Priority Date: 03/16/2016
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: YAMASHITA, Yasunobu, ISE, Kazuki, MATSUNO, Shinsuke, TAKAMI, Norio, INAGAKI, Hiroki
• Application Number:
  US15/457,335
• Publication Number:
  US 20170271717A1
• 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 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 2300/0014 Alkaline electrolytes
• CPC Class Codes: H01M 4/364 as mixtures
• CPC Class Codes: H01M 4/366 as layered products
• 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 4/625 Carbon or graphite
• CPC Class Codes: H01M 4/628 Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/663 containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

According to one embodiment, a secondary battery including a positive electrode, a negative electrode, and an electrolyte solution is provided. The negative electrode includes a negative electrode current collector, and a negative electrode mixed-materials layer disposed on the negative electrode current collector. The negative electrode current collector has a carbon-including coating layer on at least a part of the surface thereof. The negative electrode mixed-materials layer includes a negative electrode active material including a titanium-including oxide. The electrolyte solution includes an aqueous solvent and an electrolyte.

Claims

1. A secondary battery comprising:

a positive electrode;

a negative electrode which includes a negative electrode current collector having a carbon-including coating layer on at least a part of a surface thereof, and a negative electrode mixed-materials layer disposed on the negative electrode current collector, the negative electrode mixed-materials layer including a negative electrode active material that includes a titanium-including oxide; and

an electrolyte solution including an aqueous solvent and an electrolyte.

2. The secondary battery according to claim 1, wherein the carbon-including coating layer has a thickness of 10 nm to 3 μ

m.

3. The secondary battery according to claim 1, wherein the carbon-including coating layer includes carbon in an amount of 60% by weight to 98% by weight.

4. The secondary battery according to claim 1, wherein the electrolyte includes at least one anion selected from the group consisting of NO₃⁻

, Cl⁻

, LiSO₄⁻

, SO₄²⁻

, and OH⁻

.

5. The secondary battery according to claim 1, wherein the titanium-including oxide includes at least one compound selected from the group consisting of an oxide of titanium and a lithium-titanium oxide having a spinel-type structure.

6. The secondary battery according to claim 1, wherein the positive electrode includes a positive electrode active material including at least one compound selected from the group consisting of Li_xFePO₄ wherein 0≦

x≦

1, Li_xMnO₂ wherein 0<

x≦

1, and Li_xCoO₂ wherein 0<

x≦

1.

7. The secondary battery according to claim 1, wherein the positive electrode includes a positive electrode current collector having a carbon-including coating layer on at least a part of a surface thereof.

8. The secondary battery according to claim 1, wherein the negative electrode current collector includes an electrically conductive foil including at least one metal selected from the group consisting of aluminum, copper, zinc, nickel, titanium, and stainless steel.

9. The secondary battery according to claim 1, wherein the negative electrode current collector includes an electrically conductive foil including at least one metal selected from the group consisting of aluminum, copper, zinc, nickel, titanium, and stainless steel, the electrically conductive foil having a carbon-including coating layer on at least a part of a surface thereof.

10. A battery pack comprising a secondary battery according to claim 1.

11. The battery pack according to claim 10, wherein the battery pack further comprises an external power distribution terminal and a protective circuit.

12. The battery pack according to claim 10 comprising a plural of the secondary batteries, the secondary batteries being electrically connected to each other in series, in parallel, or in combination of in series and in parallel.

13. A vehicle comprising the battery pack according to claim 10.

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