prov:value
| - The cell of claim 23, in which the binder is derived from colloid precursors and reagents which are solutions of at least one salt such as chlorides, sulfates, nitrates, chlorates, perchlorates or metal organic compounds such as alkoxides, formates, acetates of silicon, aluminium, yttrium, cerium, thorium, zirconium, magnesium, lithium and other metals and mixtures thereof.
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