Sheet, sealing material, fuel cell, electrolytic cell, method for producing sheet, and method for producing sealing material

Abstract

A sheet contains swelling clay and non-swelling clay and exhibits excellent water resistance in high-temperature environment. The swelling clay contains a first component and a second component with different structures. The non-swelling clay is clay in which ions of the first component and the second component are exchanged in a dispersion medium, and is clay that exhibits a non-swelling property by heating. The sheet includes the first component (Li-substituted swelling clay), the second component (Na-type montmorillonite or K-type montmorillonite), and optionally a third component (filler), that is optionally contained. When a total weight of all components is set to 100 wt %, a content of the first component is 25 wt % or more and 80 wt % or less, a content of the second component is 10 wt % or more and 50 wt % or less, and a content of the third component is 0 wt % or more and 80 wt % or less.

Dependencies are inferred from the claim text.