biostudies-literatureUnknown10(36)Graßler NLithium-rich antiperovskites are promising high-capacity cathode materials for next-generation Li-ion batteries. In this study, partially Mn-substituted (Li<sub>2</sub>Fe<sub>1-<i>y</i></sub> Mn <sub><i>y</i></sub> )-SeO (<i>y</i> = 0.1-0.4) cathode materials were synthesized via solid-state reaction. Structural analysis confirmed the cubic antiperovskite phase with lattice expansion proportional to the Mn content, while thermal analysis revealed congruent melting behavior with improved thermal stability. Electrochemical characterization demonstrated good cycling stability across all Mn-substituted compositions. The (Li<sub>2</sub>Fe<sub>0.9</sub>Mn<sub>0.1</sub>)-SeO cathode exhibited an initial discharge capacity of 123 mAh/g and excellent cycling stability, but higher Mn content led to ACS omega41719-41726https://www.ebi.ac.uk/biostudies/studies/S-EPMC12444673biostudies-literaturePartially Manganese-Substituted Li-Rich Antiperovskite (Li<sub>2</sub>Fe)SeO Cathode for Li-Ion Batteries.PMC12444673Murar MGhunaim RSinger LGraßler NDjendjur DFroeschke SMohamed MAAKlingeler RHomm JHampel SDong BfalsePartially Manganese-Substituted Li-Rich Antiperovskite (Li<sub>2</sub>Fe)SeO Cathode for Li-Ion Batteries.Lithium-rich antiperovskites are promising high-capacity cathode materials for next-generation Li-ion batteries. In this study, partially Mn-substituted (Li<sub>2</sub>Fe<sub>1-<i>y</i></sub> Mn <sub><i>y</i></sub> )-SeO (<i>y</i> = 0.1-0.4) cathode materials were synthesized via solid-state reaction. Structural analysis confirmed the cubic antiperovskite phase with lattice expansion proportional to the Mn content, while thermal analysis revealed congruent melting behavior with improved thermal stability. Electrochemical characterization demonstrated good cycling stability across all Mn-substituted compositions. The (Li<sub>2</sub>Fe<sub>0.9</sub>Mn<sub>0.1</sub>)-SeO cathode exhibited an initial discharge capacity of 123 mAh/g and excellent cycling stability, but higher Mn content led to 2025-01-01T00:00:00Z2025 Sep2026-06-03T15:35:05.274Z2026-06-01T03:06:42.174ZS-EPMC124446734097839610.1021/acsomega.5c05612