US Patent 7901730 - Nanoporous proton conducting electrolyte

http://www.freepatentsonline.com/7901730.html

This patent is from Johnson Research & Development and teaches a fuel cell proton conducting electrolyte capable of operate at a temperature range of 200-600 C in which polymer based electrolytes such as Nafion would be destroyed. Claim 1 reads:

1. A method of manufacturing a proton only conducting electrolyte comprising the steps of:

(a) providing a nanoporous supporting substrate;

(b) filling the nanopores of the nanoporous supporting substrate with a filler material; and

(c) depositing a proton only conducting ceramic layer upon the filled nanoporous supporting substrate.