PHOSPHORIC ACID BASED FUEL CELL ELECTROLYTE AND SYSTEM

摘要

This invention relates to a gel composition suitable as a fuel cell electrolyte, consisting of: - from 30 to 89 % by weight phosphoric acid; - from 5 to 60% by weight silica; - from 1 to 7% by weight of a strong base derived from alkaline or alkaline earth hydroxides or an equivalent amount of corresponding anhydrous oxides; and - from 5 to 30% by weight water. The invention also relates to a fuel cell assembly including such electrolyte gel composition and capable of operating at a temperature ranging from 101 to 150° C.