Current collector also serving as electrode for battery, and battery including the same

Patent metadata

Field	Value
Publication number	US-2016036059-A1
Application number	US-201514809536-A
Country	US
Kind code	A1
Filing date	Jul 27, 2015
Priority date	Jul 30, 2014
Publication date	Feb 4, 2016
Grant date	—

Abstract

A current collector also serving as an electrode for a battery includes a three-dimensional fiber composite in which a plurality of conductors are disposed in a three-dimensional void of a three-dimensional fiber assembly skeleton, the three-dimensional fiber assembly skeleton being formed by intersecting and assembling a plurality of irregular shaped carbon nano-tubes. An active material that is carried on the carbon nano-tubes or an active material that is carried on the conductors is accommodated in the three-dimensional void inside the three-dimensional fiber composite, and the three-dimensional fiber composite is shaped in a sheet shape.

First claim

What is claimed is:

1 . A current collector also serving as an electrode for a battery, comprising:
a three-dimensional fiber composite in which a plurality of conductors are disposed in a three-dimensional void of a three-dimensional fiber assembly skeleton, the three-dimensional fiber assembly skeleton being formed by intersecting and assembling a plurality of irregular shaped carbon nano-tubes, wherein an active material that is carried on the carbon nano-tubes or on the conductors is accommodated in the three-dimensional void inside the three-dimensional fiber composite, and the three-dimensional fiber composite is shaped in a sheet shape.

2 . The current collector also serving as an electrode for a battery according to claim 1 ,
wherein the carbon nano-tubes and the conductors are contained in a total amount of 1% by mass to 95% by mass.

3 . The current collector also serving as an electrode for a battery according to claim 2 ,
wherein the carbon nano-tubes and the conductors are contained in a total amount of 2% by mass to 75% by mass.

4 . The current collector also serving as an electrode for a battery according to claim 1 ,
wherein a length of the carbon nano-tubes which constitute the three-dimensional fiber assembly skeleton is 0.5 μm to 2 mm, each of the conductors is a carbon nano-tube, and a length of the carbon nano-tube that constitutes the conductor is 0.01 μm to 2 mm, and sheet resistivity of the carbon nano-tube is 1×10 −6 Ωcm to 0.56×10 −1 Ωcm.

5 . The current collector also serving as an electrode for a battery according to claim 1 ,
wherein a pore size distribution of the three-dimensional void, which is formed in the three-dimensional fiber composite, has a peak at 2 nm to 1000 nm.

6 . The current collector also serving as an electrode for a battery according to claim 1 ,
wherein a thickness of the current collector also serving as an electrode for a battery is 10 μm to 1.2 mm.

7 . A battery, comprising:
the current collector also serving as an electrode for a battery according to claim 1 .

8 . The battery according to claim 7 ,
wherein a current collection path is disposed at a part of the current collector also serving as an electrode along a current extraction direction.

Assignees

• Honda Motor Co Ltd

Inventors

• Tokune Toshio
• Nikawa Hidefumi
• Nakamura Natsuo
• Komori Takahiro

Classifications

• H01M4/664

  Ceramic materials · CPC title

• H01M4/80 Primary

  Porous plates, e.g. sintered carriers · CPC title

• H01M4/663

  containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title

• H01M4/666

  in the form of mixed materials (H01M4/668 takes precedence) · CPC title

• H01M10/052

  Li-accumulators · CPC title