Publication date: 21st July 2025
Li2SnO3 (LSO) has emerged as a promising cathode material for solid-state lithium batteries due to its structural stability, thermal robustness, and lithium-containing layered framework that facilitates reversible Li-ion intercalation. In this study, LSO was synthesized via a conventional solid-state reaction route using a high-temperature furnace. The as-prepared cathode was integrated with a sulfide-based argyrodite solid electrolyte to assemble an all-solid-state battery. Electrochemical testing revealed an initial discharge capacity of approximately 80 mAh/g, demonstrating the practical potential of LSO in solid-state configurations. To further enhance the electrochemical performance, partial substitution of Sn with Mn was carried out to form Mn-doped LSO. The doping aimed to improve electronic conductivity and lithium-ion mobility through lattice distortion and enhanced defect chemistry. Mn incorporation resulted in improved battery performance, attributed to better lithium transport pathways and stabilized structural integrity during cycling. This work highlights the effectiveness of elemental doping in tuning the electrochemical behaviour of LSO and confirms the viability of solid-state synthesis for scalable cathode fabrication. The results contribute to the development of cost-effective and safe cathode materials for next-generation all-solid-state lithium batteries.
The author gratefully acknowledges the financial support from the Japan Society for the Promotion of Science (JSPS) through a Postdoctoral Fellowship (P24365) under the JSPS International Fellowship Program.
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