AN ELECTROCHEMICAL ASSEMBLY

Systems and methods for manufacturing a large-sized electrochemical assembly (200) are described herein. In some approaches, the electrochemical assembly (200) comprises a first gas manifold plate (202), a second gas manifold plate (206) and a plurality of electrochemical cell repeating unit (210) disposed between the first gas manifold plate (202) and the second gas manifold plate (206). Each electrochemical cell repeating unit (210) includes a large-size metal sheet substrate (220) with isolated smaller size porous metal structures (224) on the large-size metal sheet substrate (220). An anode layer (116A), an electrolyte layer (116B) and a cathode layer (116C) are fabricated on the large-size metal substrate (220) using thin film deposition technology. The electrochemical assembly (200) comprises a flow field design including a plurality of risers (232) of the electrochemical each large-size metal sheet substrate (220) and interconnect (222) of each electrochemical cell repeating unit to uniformly distribute a first feed stream (236) and a second feed stream (238) to each electrochemical cell repeating unit (210).