Positive electrode for lithium battery

Patent metadata

Field	Value
Publication number	US-10256473-B2
Application number	US-201615561558-A
Country	US
Kind code	B2
Filing date	Mar 25, 2016
Priority date	Mar 27, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

The means is achieved by a positive electrode for a lithium battery having a resin current collector containing a polyolefin-based resin matrix and a conductive filler, and a positive electrode active material layer provided on the resin current collector, characterized in that an electron conductive layer is disposed on the surface of the resin current collector that is in contact with the positive electrode active material layer.

First claim

The invention claimed is:

1. A bipolar type electrode for a lithium battery comprising a resin current collector containing a polyolefin-based resin matrix and a first conductive filler, an electron conductive layer provided to have a direct contact with a first surface of the resin current collector, a positive electrode active material layer, and a negative electrode active material layer provided to have a direct contact with a second surface of the resin current collector,
wherein the polyolefin-based resin matrix is polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), or a copolymer or a mixture thereof,
wherein the electron conductive layer is selected from
a first electron conductive layer comprising an epoxy resin and a second conductive filler,
a second electron conductive layer consisting of a polymer having a repeating unit derived from vinylidene fluoride and a third conductive filler, or
a third electron conductive layer comprising a polymer having a repeating unit derived from carbonic acid ester and a fourth conductive filler.

2. The bipolar type electrode for a lithium battery according to claim 1 , wherein the second conductive filler of the first electron conductive layer, the third conductive filler of the second electron conductive layer, or the fourth conductive filler of the third electron conductive layer is a carbon-based filler.

3. The bipolar type electrode for a lithium battery according to claim 1 , wherein an oxidation resistance of the electron conductive layer at room temperature (25° C.) is 4.2 V or higher based on Li.

4. A lithium battery comprising the bipolar type electrode for a lithium battery according to claim 1 .

5. A bipolar type electrode for a lithium battery comprising a resin current collector containing a polyolefin-based resin matrix and a conductive filler, an electron conductive layer provided to have a direct contact with a first surface of the resin current collector, a positive electrode active material layer, and a negative electrode active material layer provided to have a direct contact with a second surface of the resin current collector,
wherein the polyolefin-based resin matrix is polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), or a copolymer or a mixture thereof,
wherein the electron conductive layer contains a p type conductive polymer.

6. The bipolar type electrode for a lithium battery according to claim 5 , wherein an oxidation resistance of the electron conductive layer at room temperature (25° C.) is 4.2 V or higher based on Li.

7. A lithium battery comprising the bipolar type electrode for a lithium battery according to claim 5 .

8. A positive electrode for a lithium battery comprising a resin current collector containing a polyolefin-based resin matrix and a first conductive filler, and a positive electrode active material layer,
wherein the polyolefin-based resin matrix is polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), or a copolymer or a mixture thereof,
wherein an electron conductive layer is disposed to have a direct contact with a surface of the resin current collector, and
wherein the electron conductive layer mainly contains at least one of an epoxy resin, a polymer having a repeating unit derived from vinylidene fluoride, or a polymer having a repeating unit derived from carbonic acid ester, and a second conductive filler.

9. The positive electrode for a lithium battery according to claim 8 , wherein the conductive filler used for the electron conductive layer is a carbon-based filler.

10. The positive electrode for a lithium battery according to claim 8 , wherein an oxidation resistance of the electron conductive layer at room temperature (25° C.) is 4.2 V or higher based on Li.

11. A lithium battery comprising the positive electrode for a lithium battery according to claim 8 .

12. A positive electrode for a lithium battery comprising a resin current collector containing a polyolefin-based resin matrix and a conductive filler, and a positive electrode active material layer,
wherein the polyolefin-based resin matrix is polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), or a copolymer or a mixture thereof,
wherein an electron conductive layer is disposed to have a direct contact with a surface of the resin current collector, and
wherein the electron conductive layer contains a p type conductive polymer.

13. The positive electrode for a lithium battery according to claim 12 , wherein an oxidation resistance of the electron conductive layer at room temperature (25° C.) is 4.2 V or higher based on Li.

14. A lithium battery comprising the positive electrode for a lithium battery according to claim 12 .

15. The bipolar type electrode for a lithium battery according to claim 1 , wherein the electron conductive layer is the first electron conductive layer comprising the epoxy resin and the second conductive filler.

16. The bipolar type electrode for a lithium battery according to claim 1 , wherein the electron conductive layer is the second electron conductive layer consisting of the polymer having the repeating unit derived from vinylidene fluoride and the third conductive filler.

17. The bipolar type electrode for a lithium battery according to claim 1 , wherein the electron conductive layer is the third electron conductive layer comprising the polymer having the repeating unit derived from carbonic acid ester and the fourth conductive filler.

18. The bipolar type electrode for a lithium battery according to claim 1 , wherein the first conductive filler is a carbon-based filler.

19. The bipolar type electrode for a lithium battery according to claim 2 , wherein the first conductive filler is a carbon-based filler.

Assignees

• Nissan Motor

Inventors

• Ohsawa Yasuhiko
• Satou Hajime
• Akama Hiroshi
• Horie Hideaki
• Mizuno Yusuke
• Fukumoto Hiroshi
• Okura Masatoshi
• Shindo Yasuhiro
• Tsudo Yasuhiro

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M6/48

  with bipolar electrodes · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/668

  Composites of electroconductive material and synthetic resins · CPC title