NOVELTY - A solid-state multi layer ceramic battery comprises at least one multi-layer cell structure. The cell structure comprises a porous sponge ceramic anode layer having several of pores formed within ceramic material, where pores are only partially filled and being coated with at least one anode active material; porous sponge ceramic cathode layer having several of pores formed within ceramic material, where the pores are only partially filled and being coated with at least one cathode active material; and a dense ceramic electrolyte layer positioned between the anode and cathode layer.    USE - As solid-state multi layer ceramic battery (claimed) which is useful for high energy and power applications such as in laptop computers, cell phones or electric vehicles, three-dimensional solid-state batteries.    ADVANTAGE - By utilizing a sponge structure for the anode and cathode electrodes within the cell structure, the present battery provides improved ionic conductivity in the anode and cathode thus leads to high discharge power and energy density of the battery. The structures consist of porous solid-state ion conducting layers bonded to either side of a dense middle layer. The dense middle layer provides the solid electrolyte separator for the battery while the bonded porous layers act as an effective ion manifold via a skeleton of three dimensional ion conducting webs to contain the electrode materials. The anode and cathode electrode materials are synthesized in place from liquid anode and cathode precursor materials impregnated into the porous layers. The present battery utilizing the sandwich structure has a simple trilayer cell construction or is a multi-layered device with either parallel internal cell units or cell units in series. Such cells connected in parallel provide batteries with higher capacities in proportion to the number of parallel cells and those connected in series provide batteries with higher voltages in proportion to the number of series connected cells. The cells can have internal metal current collectors, which join to external current collectors or battery poles, or if the anode and cathodes are sufficiently electronically conductive, internal current collectors can be eliminated. Thus the multi-layered structure of the present invention offers an extremely compact ceramic construction, which can comprise dozens or even hundreds of layers of internal parallel or series battery cell plates. The ceramic battery structure itself would form its own hermetic housing. The use of the present multi-layer ceramic battery (MLCB) would include batteries of dependable solid-state construction, which would provide extremely compact devices capable of standard solderable surface mount placement like other ceramic chip components. As there are no hazardous or flammable electrolytes, the MLCB would be safer than a typical Li ion battery. If the present device were crushed or punctured, the battery would be expected to shatter into many fragments maintaining separation of opposite electrodes. Another potential advantage of the present solid-state electrolyte is the expectation of enhanced current capabilities at high temperatures, due to an expected solid-state ionic conduction mechanism compared to a liquid conduction as in other batteries. Due to the absence of liquid electrolyte and moisture or oxygen sensitive materials, it is expected that processing of the present devices would be achieved under normal ambient conditions using equipment used in the multilayer capacitor industry.