Song, Hyeon-Ju Kim, Suji Choi, Yoo-Jung Yoo, Jung-Keun Kim, Jinsoo Ryu, Won-Hee 2025-08-20T08:35:09Z 2025-08-20T08:35:09Z 2025-08-20 2025-09 1385-8947 https://pubs.kist.re.kr/handle/201004/153008 All-solid-state batteries (ASSBs) are attracting considerable attention for use in altering conventional Li-ion batteries, owing to their high energy density and safety. However, sulfide-based solid electrolytes suffer from having a narrow electrochemical stability window and consequent side reactions with high-Ni layered cathode materials and carbon-based conductive carbon agents at high voltages, underscoring the need for a stable alternative to existing carbon agent. This causes interfacial degradation and deteriorates the cycling performance. This study introduces a highly conductive and durable cathode-framework-stabilizing additive employing black WO3-x particles for obtaining high-performance carbon-free sulfide-based ASSBs. Using black WO3-x as cathode composite layer additive stabilized the cathode/ electrolyte interface and provided both electronic and ionic conductivity in the cathode layer. In addition, the cathode composite layer with black WO3-x improved the electrochemical performance and cycle stability in ASSB cells without a carbon agent. These findings demonstrate that simply incorporating highly conductive and durable metal oxides into cathode composite layer additives can improve the cycling stability of ASSBs. English Elsevier BV Highly conductive and durable metal oxide particles as cathode composite layer additives for carbon-free all-solid-state batteries Article 10.1016/j.cej.2025.165949 1 Chemical Engineering Journal, v.520 Chemical Engineering Journal 520 N scie scopus 001541138000008 2-s2.0-105011142462 Engineering, Environmental Engineering, Chemical Engineering Article ELECTROCHEMICAL REDOX ARGYRODITE LI6PS5CL INTERFACE STABILITY OXYGEN VACANCIES ELECTROLYTE SURFACE WO3