A fibrous microcell structure comprising: (1) an inner electrode, (2) a hollow
fibrous membrane separator in contact with the inner electrode, (3) an electrolyte
embedded in the hollow fibrous membrane separator, and (4) an outer electrode,
wherein at least one of the inner and outer electrodes comprises a metal clad composite
having two or more metal layers bonded together by solid-phase bonding. Preferably,
such fibrous microcell structure is a fuel cell that comprises inner current collector,
an inner catalyst layer, a hollow fibrous membrane separator in contact with the
inner catalyst layer and the inner current collector, an electrolyte embedded in
the hollow fibrous membrane separator, an outer catalyst layer, and an outer current collector.
