Riken Corporation

Emi Muto

Toyoki Kunitake

Yoshitaka Aoki

Yuanzhi Li

A novel ion conductive material is provided. The ion conductive material composed of an amorphous material is employed.

Ion conductive material, conductive film for fuel cell, film electrode bonded body and fuel cell

A proton conducting membrane comprising, as a main component, a ceramic structure in which an oxygen atom of a metal oxide is bonded through the oxygen atom with at least one group derived an oxygen acid selected from &#x2014;B(O)&#x2014;, &#x2014;S(&#x2550;O)(O)&#x2014;, &#x2014;P(&#x2550;O)(O)&#x2014;, &#x2014;C(&#x2550;O)(O)&#x2014;, and &#x2014;N(O)&#x2014;, wherein the metal oxide and said at least one group derived from the oxygen acid share the oxygen atom, the proton conducting membrane being made by a sol-gel reaction of the oxygen acid or its precursor and a precursor of the metal oxide in order to obtain a sol-gel reaction product, followed by heating of the sol-gel reaction product at a temperature in a range of 100&#xb0; C. to 600&#xb0; C., the oxygen acid or its precursor being selected from a boric acid, a sulfuric acid, a phosphoric acid, a carbonic acid, a nitric acid, and precursors thereof. Thus, a novel proton conducting membrane is provided.

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Wako, Japan

Emi Muto