| abstract |
The present invention relates to a hydrogen discharge film, a composite hydrogen discharge film, a hydrogen discharge laminated film, and a hydrogen discharge film and a composite hydrogen discharge film that are not easily embrittled at an environmental temperature of use of an electrochemical element and are not easily deteriorated by a gas released from an organic material. , Providing safety valves for electrochemical devices with hydrogen-discharging laminated films. A hydrogen discharge film 2 comprising an alloy containing Pd and Au, wherein the Au content in the alloy containing Pd and Au is 40 to 55 mol%, and the film thickness t and the film area s satisfy the following formula 1. And hydrogen discharge film 1 having hydrogen discharge film 2 on one or both sides of metal layer 4, hydrogen discharge film 2, or hydrogen discharge laminated film 1 having support 4 on one or both sides of composite hydrogen discharge film 1, and A safety valve for electrochemical devices equipped with these membranes. <Formula 1> t / s <41.1 m <-1> [Selection] Figure 1 |