Negative electrode active substance particles for non-aqueous electrolyte secondary batteries and process for producing the same, and non-aqueous electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-2015064553-A1
Application number	US-201314388916-A
Country	US
Kind code	A1
Filing date	Mar 14, 2013
Priority date	Mar 30, 2012
Publication date	Mar 5, 2015
Grant date	—

Abstract

The present invention relates to a negative electrode active substance for non-aqueous electrolyte secondary batteries comprising composite particles comprising metal particles, and a thermosetting resin or a carbonized product of the thermosetting resin, the composite particles having an average particle diameter of 5 to 100 μm; and a lithium ion secondary battery using the negative electrode active substance for non-aqueous electrolyte secondary batteries. The lithium ion secondary battery of the present invention is a non-aqueous electrolyte secondary battery that is prevented from suffering from volume expansion owing to occlusion of Li therein.

First claim

1 . A negative electrode active substance for non-aqueous electrolyte secondary batteries comprising composite particles comprising metal particles and a thermosetting resin, the composite particles having an average particle diameter of 5 to 100 μm.

2 . The negative electrode active substance for non-aqueous electrolyte secondary batteries according to claim 1 , wherein a content of the thermosetting resin in the negative electrode active substance is 5.0 to 30% by weight.

3 . A negative electrode active substance for non-aqueous electrolyte secondary batteries comprising composite particles comprising metal particles and a carbonized product of a thermosetting resin, the composite particles having an average particle diameter of 5 to 100 μm.

4 . The negative electrode active substance for non-aqueous electrolyte secondary batteries according to claim 3 , wherein a content of the carbonized product of the thermosetting resin in the negative electrode active substance is 0.1 to 20% by weight.

5 . The negative electrode active substance particles for non-aqueous electrolyte secondary batteries according to claim 1 , wherein the thermosetting resin is a thermosetting phenol resin or a thermosetting epoxy resin.

6 . The negative electrode active substance for non-aqueous electrolyte secondary batteries according to claim 1 , wherein at least one carbon selected from the group consisting of a crystalline carbon and a carbon nanotube is incorporated inside of particles of the negative electrode active substance for non-aqueous electrolyte secondary batteries, or allowed to be present on a surface of the respective particles.

7 . A process for producing the negative electrode active substance as claimed in claim 3 , comprising the steps of granulating the metal particles, and the thermosetting phenol resin or the thermosetting epoxy resin to form a composite material thereof, and then subjecting the composite material to heat treatment at a temperature of 300 to 1200° C. in a reducing atmosphere.

8 . A lithium ion secondary battery using the negative electrode active substance for non-aqueous electrolyte secondary batteries as claimed in claim 1 , as a negative electrode material.

Assignees

• Toda Kogyo Corp

Inventors

• Kono Yoshiteru
• Ogisu Kenji
• Hayashi Kazuyuki
• Iwami Katsuji
• Okita Tomoko

Classifications

• H01M4/622

  being polymers · CPC title

• H01M10/05

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• H01M4/364 Primary

  as mixtures · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title