Fabrication of Three-Dimensional Battery Using Ceramic Electrolyte with Honeycomb Structure by Sol–Gel Process

(LLT) with a honeycomb structure, which has microsized holes on both sides of a membrane, was prepared as an electrolyte for three-dimensional all-solid-state rechargeable lithium-ion batteries. In this study, and were used as cathode and anode materials, respectively, and their particles were fabricated by the sol–gel method, which provided not only small particles to inject into the microsized holes of the honeycomb electrolyte (0.6 and for and , respectively) but also particles with high discharge capacities (98.6 and 90.2% of their theoretical capacities for and , respectively). The impregnation of active material particles mixed with the precursor sol into the honeycomb holes provided a good contact between the LLT electrolyte and the active materials, which reduced the internal resistance of the cell and improved the discharge capacity. Accordingly, the all-solid-state battery was successfully operated at 1.1 V with a discharge capacity of .