1B-4
Liquid-Phase-Assisted Co-Sintering of LCO/LLZTO Bilayers for Garnet-based Solid-State Batteries, V. APRILIA (NIMS) et al.

Garnet-based all-solid-state lithium-ion batteries face high interfacial resistance between the LLZTO electrolyte and LCO cathode. This study investigates LiOH · H2O as a sintering aid to promote liquid-phase co-sintering at reduced temperatures. We evaluate how temperature and LiOH · H2O content during single-step co-sintering influence the densification and interfacial microstructural evolution that facilitates lithium-ion transport. The LLZTO layer in the co-sintered bilayer achieved an ionic conductivity of 6.33 × 10^-4 S cm^-1. Furthermore, the assembled LCO/LLZTO/In-Li cell delivered an initial charge capacity of approximately 100 mAh g^-1 at 25 °C, demonstrating a promising strategy for simplifying the fabrication of garnet-based solid-state batteries.