Anode of lithium battery and lithium battery using the same

Patent metadata

Field	Value
Publication number	US-2018323437-A1
Application number	US-201715792792-A
Country	US
Kind code	A1
Filing date	Oct 25, 2017
Priority date	May 8, 2017
Publication date	Nov 8, 2018
Grant date	—

Abstract

An anode of lithium battery comprises a current collector and an anode material layer. The anode material layer is located in at least one surface of the current collector. The current collector is a three-dimensional porous composite structure. The three-dimensional porous composite structure comprises a porous structure and at least one carbon nanotube structure. The porous structure has a plurality of metal ligaments and a plurality of pores. The at least one carbon nanotube structure is embedded in the porous structure and comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force, wherein the plurality of carbon nanotubes are arranged along a same direction.

First claim

What is claimed is:

1 . An anode of lithium battery, comprising:
a current collector being a three-dimensional porous composite structure, the three-dimensional porous composite structure comprising:
a porous structure comprising a plurality of metal ligaments and a plurality of pores; and
at least one carbon nanotube structure embedded in the porous structure and comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force, wherein the plurality of carbon nanotubes are arranged along a same direction; and
an anode active material layer located on at least one surface of the current collector.

2 . The anode of lithium battery of claim 1 , wherein each of the plurality of pores is formed by adjacent metal ligaments.

3 . The anode of lithium battery of claim 1 , wherein a size of each of the plurality of pores is less than or equal to 100 μm.

4 . The anode of lithium battery of claim 1 , wherein material of the plurality of metal ligaments is an inert metal.

5 . The anode of lithium battery of claim 1 , wherein one part of the carbon nanotube structure is embedded in the plurality of metal ligaments, and another part of the carbon nanotube structure is located in the plurality of pores.

6 . The anode of lithium battery of claim 1 , wherein the at least one carbon nanotube structure comprises a plurality of carbon nanotube structures spaced from each other.

7 . The anode of lithium battery of claim 6 , wherein an angle between carbon nanotubes in adjacent spaced carbon nanotube structures is in a range from 0° to 90°.

8 . The anode of lithium battery of claim 7 , wherein adjacent spaced carbon nanotube structure are parallel with each other.

9 . The anode of lithium battery of claim 1 , wherein the carbon nanotube structure comprises at least one carbon nanotube film, the at least one carbon nanotube film is a drawn carbon nanotube film comprising a plurality of successively oriented carbon nanotube segments joined end-to-end by van der Waals force therebetween.

10 . The anode of lithium battery of claim 9 , wherein the at least one carbon nanotube film comprises a plurality of carbon nanotube films coplanar or stacked.

11 . The anode of lithium battery of claim 10 , wherein an angle between carbon nanotubes in adjacent stacked carbon nanotube films is in a range from 0° to 90°.

12 . The anode of lithium battery of claim 1 , wherein a common interface is defined between the at least one carbon nanotube structure and the porous structure.

13 . A lithium battery comprising:
an anode comprising a current collector being a three-dimensional porous composite structure, the three-dimensional porous composite structure comprising:
a porous structure comprising a plurality of metal ligaments and a plurality of pores; and
at least one carbon nanotube structure embedded in the porous structure and comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force, wherein the plurality of carbon nanotubes are arranged along a same direction; and
an anode active material layer locating in at least one surface of the current collector;
a cathode; a separator configured to separate the anode from the cathode.

Assignees

• Univ Tsinghua
• Hon Hai Prec Ind Co Ltd

Inventors

• Fu hong-ying
• Li Wen-Zhen

Classifications

• C01B32/158

  Carbon nanotubes · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/665

  Composites · CPC title

• H01M4/663 Primary

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