Hydrogen-releasing film

Patent metadata

Field	Value
Publication number	US-2017133646-A1
Application number	US-201515318845-A
Country	US
Kind code	A1
Filing date	Jun 12, 2015
Priority date	Jun 16, 2014
Publication date	May 11, 2017
Grant date	—

Abstract

The present invention provides a hydrogen-releasing film and a hydrogen-releasing laminated film that have high reliability as a safety valve since defects such as cracks do not occur before the internal pressure of an electrochemical element reaches a predetermined pressure. The hydrogen-releasing film contains an alloy having Pd as an essential metal, and the size of the crystal grains in the alloy is 0.028 μm or more.

First claim

1 . A hydrogen-releasing film containing an alloy having Pd as an essential metal, wherein the size of the crystal grains in the alloy is 0.028 μm or more.

2 . The hydrogen-releasing film according to claim 1 , wherein the alloy contains a Group 11 element in an amount of 20 to 65 mol %.

3 . The hydrogen-releasing film according to claim 2 , wherein the Group 11 element is at least one kind selected from the group consisting of gold, silver, and copper.

4 . The hydrogen-releasing film according to claim 2 , wherein the hydrogen permeation coefficient at 50° C. is 1.0×10 −13 to 2.0×10 −9 (mol·m −1 ·sec −1 ·Pa −1/2 ), and the film thickness t and the film areas satisfy the following expression 1.
t/s< 32.9 m −1   <Expression 1>

5 . A hydrogen-releasing laminated film, comprising a support on one surface or both surfaces of the hydrogen-releasing film according to claim 1 .

6 . The hydrogen-releasing laminated film according to claim 5 , wherein the support is a porous body having an average pore diameter of 100 μm or less.

7 . The hydrogen-releasing laminated film according to claim 5 , wherein a raw material of the support is at least one kind selected from the group consisting of polytetrafluoroethylene, polysulfone, polyimide, polyamide-imide, and aramid.

8 . A safety valve for an electrochemical element, wherein the valve is provided with the hydrogen-releasing film according to claim 1 .

9 . An electrochemical element, wherein the element is provided with the safety valve according to claim 8 .

10 . The electrochemical element according to claim 9 , wherein the electrochemical element is an aluminum electrolytic capacitor or a lithium ion battery.

Assignees

• Nitto Denko Corp

Inventors

• Fukuoka Takahiro
• Kira Yoshiko
• Ishii Kyoko
• Hata Kenta
• Yukawa Hiroshi
• Nanbu Tomonori

Classifications

• H01M2/1241

  Electricity · mapped topic

• C23C14/14

  Metallic material, boron or silicon · CPC title

• C22C5/04

  Alloys based on a platinum group metal · CPC title

• H01M2/1264 Primary

  Electricity · mapped topic

• H01G9/12 Primary

  Vents or other means allowing expansion · CPC title