NOVELTY - The process of fabricating a basic planar electrochemical cell, comprises preparing structures comprising a powder layer of a first electrode material and a second electrode material between which a powder material electrolyte layer is inserted, and simultaneously sintering the powder layers under a pulsed electrical field. The electrochemical cell comprises first and second electrodes between which an electrolyte is inserted. The first and second electrode materials comprise a ceramic having electronic conduction or ionic conduction, and heat decomposable pore forming agents.    USE - The process is useful for fabricating a basic planar electrochemical fuel cell to produce energy or hydrogen, where the fuel cells have solid oxide or high temperature electrolyzers (all claimed).    ADVANTAGE - The process is capable of simply, rapidly and economically fabricating the basic planar electrochemical fuel cells with reduced size and less consumption of energy thus effectively producing the energy or hydrogen with high purity.    DETAILED DESCRIPTION - The process of fabricating a basic planar electrochemical cell, comprises preparing structures comprising a powder layer of a first electrode material and a second electrode material between which a powder material electrolyte layer is inserted, and simultaneously sintering the powder layers under a pulsed electrical field. The electrochemical cell comprises first and second electrodes between which an electrolyte is inserted. The first and second electrode materials comprise a ceramic having electronic conduction or ionic conduction, and heat decomposable pore forming agents. The structures comprise interconnecting material layers that are distributed on both sides of the powder layers of the first and second electrode materials, and are superimposed on each other while separating one another by a separating element. The interconnecting material comprises metal alloys and ceramics, and is present in the form of a powder. The separating element is a graphite sheet covered on both sides of a carbon diffusion barrier, and comprises an interconnecting material layer.