BATTERY

• US 20080160406A1
• Filed: 06/26/2007
• Published: 07/03/2008
• Est. Priority Date: 06/29/2006
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kawase, Kenichi, Kato, Yoshikazu
• Granted Patent: US 9,385,373 B2
• Time in Patent Office: Days
• US Class Current: 429/217
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/134 Electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/60 of organic compounds
• CPC Class Codes: H01M 4/604 containing aliphatic main chain polymers
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: H01M 4/622 being polymers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery capable of improving the safety when the battery is broken while securing the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolyte. The anode includes an anode active material layer that has a resin containing sulfur (S). Compared to a case not having the resin containing resin, a sufficient discharge capacity can be obtained even when charge and discharge is repeated, and smoking and ignition are not easily generated when the battery is broken. Thereby, the cycle characteristics are secured, and the safety when the battery is broken is improved.

Claims

1. A battery comprising:

a cathode;

an anode; and

an electrolyte,

wherein the anode includes an anode active material layer that has a resin containing sulfur (S).

2. The battery according to claim 1, wherein the resin containing sulfur has a sulfone bond (—

SO₂—

) or a thioether bond (—

S—

).

3. The battery according to claim 1, wherein the resin containing sulfur has a structure shown in Chemical formula 1.

4. The battery according to claim 1, wherein the resin containing sulfur is at least one selected from the group consisting of polysulfone and polyether sulfone.

5. The battery according to claim 1, wherein the resin containing sulfur is a binder.

6. The battery according to claim 1, wherein the anode active material layer further contains a carbon material, and has a thickness of 40 μ

m or less.

7. The battery according to claim 6, wherein a content of the resin containing sulfur is 10 wt % or less.

8. The battery according to claim 1, wherein the anode active material layer further contains at least one selected from the group consisting of a simple substance, an alloy, and a compound of silicon (Si) or tin (Sn), and has a thickness of 30 μ

m or less.

9. The batter according to claim 8, wherein a content of the resin containing sulfur is 20 wt % or less.

10. The battery according to claim 1, wherein the anode active material layer further contains at least one selected from the group consisting of polyvinylidene fluoride and polyimide.