Solid-state lithium batteries are promising for safety and energy density compared to traditional lithium-ion batteries. However, the large interfacial resistance between the electrode and electrolyte is a bottleneck to have high performance solid-state batteries. Engineered electrode structures with a porous scaffold of the solid electrolyte material are promising to lower the interfacial resistance, and provide a mechanical support for a thin solid electrolyte layer. This talk will involve three ceramic processes to fabricate porous/dense architectures based on Li_6.25Al_0.25La₃Zr₂O₁₂ garnet material, including phase inversion, high shear compaction and fugitive tape casting.