▎ 摘　　要

NOVELTY - Electrochemical cell has a cathode, an anode, an electrolyte separator 30 located between the cathode and the anode, and comprising a ceramic material, and a cathode current collector 20, where the cathode is located between the cathode current collector and the electrolyte separator, the cathode comprises a three dimensional (3D) porous cathode structure including ionically conducting electrolyte strands extending through the cathode from the cathode current collector to the electrolyte separator, pores extending through the cathode from the cathode current collector to the electrolyte separator, and an electronically conducting network extending on sidewall surfaces of the pores from the cathode current collector to the electrolyte separator. USE - Electrochemical cell for lithium-ion battery. ADVANTAGE - The electrochemical cell provides high cathode utilization efficiency, high capacity and high energy density for lithium-ion battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for forming 3D porous cathode structure for the electrochemical cell, which involves: a. mixing a first, second and third precursor materials together to form a mixture; b. depositing the mixture as a layer where the cathode is to be formed; and c. sintering the mixture to form the 3D porous cathode structure. DESCRIPTION OF DRAWING(S) - The drawing shows a sub-cell housing of solid-state cell. Cathode layer (10) Current collectors (20) Separator (30) Porous anode receptive space (41) Anode active material (43)