| abstract |
A dope ( 24 ) containing a solvent and a precursor of a solid electrolyte is cast onto a belt ( 94 ) to form a casting membrane ( 61 ). The casting membrane ( 61 ) is immersed in a contact liquid ( 100 ) in a liquid bath ( 83 ) and peeled as a wet precursor membrane ( 67 ) from the belt ( 94 ) when having a self-supporting property. The solvent contained in the wet precursor membrane ( 67 ) is substituted by the contact liquid ( 100 ), and the wet precursor membrane ( 67 ) is transported out of the liquid bath ( 83 ). After being dried in a tenter device ( 85 ), the wet precursor membrane ( 67 ) is contacted with a proton solution ( 110 ) in a proton substitution chamber ( 86 ) to perform proton substitution to the precursor contained in the wet precursor membrane ( 67 ), and then dried in a drying chamber ( 87 ) to be a solid electrolyte membrane ( 77 ). |