Collector having multiple resin layers for bipolar lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-9077040-B2
Application number	US-201013395565-A
Country	US
Kind code	B2
Filing date	Dec 6, 2010
Priority date	Jan 29, 2010
Publication date	Jul 7, 2015
Grant date	Jul 7, 2015

Abstract

To provide a method that is capable of suppressing absorption of lithium ions into the inner portion of a resin collector that is used in a bipolar lithium ion secondary battery. The collector for a bipolar lithium ion secondary battery of the invention has at least two conductive layers. One of the conductive layers that constitute the collector (a first conductive layer) is configured by adding a conductive filler into a base material that contains an imide group-containing resin. The other of the conductive layers that constitute the collector (a second conductive layer) is configured by adding a conductive filler into a base material that contains a polar resin containing no imide group. The collector for a bipolar lithium ion secondary battery is further characterized in that when a bipolar electrode is formed, the first conductive layer is arranged on the positive electrode side.

First claim

The invention claimed is:

1. A collector for a bipolar lithium ion secondary battery comprising:
a first conductive layer that is configured by adding a conductive filler into a base material that contains an imide group-containing resin; and
a second conductive layer that is configured by adding a conductive filler into a base material that contains a polar resin containing no imide group,
wherein the first conductive layer is arranged on a positive electrode side.

2. The collector for a bipolar lithium ion secondary battery according to claim 1 , wherein the secondary conductive layer is thicker than the first conductive layer.

3. The collector for a bipolar lithium ion secondary battery according to claim 1 , wherein the resin containing no imide group is crystalline.

4. An electrode for a bipolar lithium ion secondary battery comprising:
the collector according to claim 1 ;
a positive electrode active material layer formed on the first conductive layer side surface of the collector; and
a negative electrode active material layer formed on the second conductive layer side surface of the collector.

5. A bipolar lithium ion secondary battery comprising an electric power generating element in which the electrode described in claim 4 and an electrolyte layer are laminated.

6. The collector for a bipolar lithium ion secondary battery according to claim 2 , wherein the resin containing no imide group is crystalline.

Assignees

• Honda Takashi
• Tanaka Yasuyuki
• Ibuka Shigeo
• Ichikawa Satoru
• Nissan Motor

Inventors

• Honda Takashi
• Tanaka Yasuyuki
• Ibuka Shigeo
• Ichikawa Satoru

Classifications

• H01M4/666

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

• H01M4/667 Primary

  in the form of layers, e.g. coatings · CPC title

• H01M10/0418

  with bipolar electrodes · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title