Electrode active material, electrode and electrical storage device

• US 9,424,996 B2
• Filed: 04/26/2013
• Issued: 08/23/2016
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: Musashi Energy Solutions Company Limited
• Original Assignee: JSR Corporation, JM Energy Corporation (Musashi Seimitsu Industry Company Limited)
• Inventors: Utaka, Tomohiro, Hayashi, Toshihiro
• Primary Examiner(s): Ridley, Basia
• Assistant Examiner(s): ERWIN, JAMES M
• Application Number:
  US13/871,373
• Publication Number:
  US 20130309577A1
• Time in Patent Office: 1,215 Days
• Field of Search: 429/231.8
• US Class Current: 1/1
• CPC Class Codes: B82Y 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: H01G 11/24 characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
• CPC Class Codes: H01G 11/34 characterised by carbonisation or activation of carbon
• CPC Class Codes: H01G 11/42 Powders or particles, e.g. composition thereof
• CPC Class Codes: H01G 11/50 specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
• CPC Class Codes: H01G 9/048 characterised by their structure H01G11/22 takes precedence
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/366 as layered products
• CPC Class Codes: H01M 4/583 Carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y10S 977/948 Energy storage/generating using nanostructure, e.g. fuel cell, battery

Abstract

The electrode active material includes a carbon material having a volume of macropores with 50 to 400 nm pore diameters of 0.05 to 0.40 cc/g. The carbon material may be a composite carbon material that contains a carbon material forming a core, and a coating carbon material covering at least part of the core-forming carbon material.

Claims

1. An electrode active material comprising a carbon material, wherein a volume of micropores having a pore diameter of 50 to 400 nm in the carbon material is 0.05 to 0.40 cc/g as measured by a nitrogen absorption method.

2. The electrode active material according to claim 1, wherein the carbon material is a composite carbon material that contains a carbon material forming a core, and a coating carbon material covering at least part of the core-forming carbon material.

3. The electrode active material according to claim 2, wherein the coating carbon material comprises a carbon black.

4. The electrode active material according to claim 1, wherein the carbon material has a 50% volume cumulative diameter D50 of 1.0 to 10.0 μ

m.

5. An electrode comprising the electrode active material according to claim 1.

6. An electrical storage device comprising the electrode according to claim 5 as a negative electrode.

7. A lithium ion capacitor comprising the electrode according to claim 5 as a negative electrode.

8. A lithium ion secondary battery comprising the electrode according to claim 5 as a negative electrode.

9. The electrode active material according to claim 1, wherein the carbon material has a 50% volume cumulative diameter D50 of 1.0 to 5.0 μ

m.

10. The electrode active material according to claim 2, wherein the coating carbon material comprises a calcined mixture of a carbon black and a pitch or a calcined mixture of a carbon black and a thermoplastic resin.