Conductive member, cell stack, electrochemical module, and electrochemical device

Patent metadata

Field	Value
Publication number	US-9786927-B2
Application number	US-201314401535-A
Country	US
Kind code	B2
Filing date	May 17, 2013
Priority date	May 17, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

To provide a conductive member and a cell stack, where a concave groove of a conductive base substrate can be covered with a cover layer, as well as an electrochemical module and an electrochemical device.

First claim

The invention claimed is:

1. A conductive member comprising:
a conductive base substrate comprising an alloy containing Cr;
a chromium oxide covering the conductive base substrate; and
a cover layer covering the chromium oxide,
wherein the conductive base substrate comprises a concave groove extending from the surface toward the inside, the chromium oxide is filled in the concave groove, and
the surface of the chromium oxide is covered with the cover layer in the concave groove; and
wherein the concave groove comprises:
a concave portion present on the surface side of the conductive base substrate; and
a crack extending linearly from the concave portion toward the inside of the conductive base substrate in cross-sectional view of the conductive base substrate.

2. The conductive member according to claim 1 , wherein
the chromium oxide is filled in the concave portion and the crack.

3. The conductive member according to claim 1 , wherein
the surface of the chromium oxide is dented in the concave portion, and
a part of the cover layer digs into the dented portion.

4. The conductive member according to claim 1 , wherein
the chromium oxide extends linearly in the crack in cross-sectional view of the conductive base substrate.

5. The conductive member according to claim 1 , wherein
the chromium oxide comprises dots located linearly in the crack in cross-sectional view of the conductive base substrate.

6. The conductive member according to claim 3 , wherein
no material constituting the cover layer is present in the concave groove 20 μm or more inside from the surface of the conductive base substrate.

7. A cell stack comprising a plurality of electrochemical cells electrically connected to each other with the conductive members according to claim 1 therebetween.

8. An electrochemical module comprising the cell stack according to claim 7 in a storage container.

9. An electrochemical device comprising the electrochemical module according to claim 8 and an accessory machine to operate the electrochemical module in an outer case.

Assignees

• Kyocera Corp

Inventors

• Higashi Masahiko

Classifications

• H01M8/2425

  High-temperature cells with solid electrolytes · CPC title

• H01M8/0232 Primary

  Metals or alloys · CPC title

• H01M8/0228 Primary

  in the form of layered or coated products · CPC title

• H01M8/0208

  Alloys · CPC title

• H01M8/0256

  Vias, i.e. connectors passing through the separator material · CPC title