| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogen discharge film hardly dropping in hydrogen discharging property even in the case where it is used for a long term, and to provide an electrochemical element safety valve having said hydrogen discharge film, and an electrochemical element having said safety valve.SOLUTION: In a hydrogen discharge film having a metal layer, at least one face of said hydrogen discharge film has a water contact angle of 85 degrees or more.SELECTED DRAWING: Figure 1 |
