Solid state battery with surface ion-diffusion enhancement coating and method for manufacturing thereof.

A solid state battery cell comprising an anode, a cathode and a solid electrolyte matrix, wherein at least the anode or the cathode comprises a functional battery material (10) having pores and wherein an inner surface of the pores is coated with a first surface-ion diffusion enhancement (SIDE) coating (20) and wherein the solid electrolyte matrix comprises an electronically insulating matrix (30) for a solid electrolyte, the electronically insulating matrix having pores or passages and wherein an inner surface of the pores or the passages is coated with a second SIDE coating (40).