Patent ID: 6489050
Filing Date: 2002-12-03
Classification: H01M,Y02E

Abstract:
An electrochemical apparatus comprising:a stack of at least two compact cells; wherein the cell maximum thermal pathway length is up to about 4 centimeters; wherein the cell has a solid electrolyte layer disposed between an oxygen electrode layer and a fuel electrode layer, and a separator layer contacting the surface of opposing electrodes of adjacent cells opposite the electrolyte; wherein the cell defines internal feed passages for providing reactant gases to said electrodes including airflow of about 1 to about 3 times stoichiometric which has been preheated close to stack temperature, and a stack outer surface for radiating cell heat outside the cell; wherein at least one layer of the cell, selected from the group consisting of a solid electrolyte layer, an oxygen electrode layer, a fuel electrode layer and a separator layer, removes cell heat by conduction within the stack to the stack outer surface for transfer by radiative cooling from the stack outer surface.