Shin, Hyeon-Ji Kim, Jun-Tae Han, Daseul Kim, Hyung-Seok Chung, Kyung Yoon Mun, Junyoung Kim, Jongsoon Nam, Kyung-Wan Jung, Hun-Gi 2024-11-30T06:30:22Z 2024-11-30T06:30:22Z 2024-11-30 2025-01 1614-6832 https://pubs.kist.re.kr/handle/201004/151222 Recent studies have identified an imbalance between the electronic and ionic conductivities as the drivers of inhomogeneous reactions in composite cathodes, which cause the rapid degradation of all-solid-state battery (ASSB). To mitigate localized overcharge and utilize isolated active materials, the study proposes the coating of an argyrodite-type Li6PS5Cl solid electrolyte (SE) with graphene-like carbon (GLC@LPSCl), a 2D conductive material, to offer a continuous three-dimensionally connected electron pathway within the composite cathode to facilitate ion mobility and promote homogeneous reactions. Despite reducing the content of the conducting agent, it is observed that the GLC@LPSCl cell exhibits high initial Coulombic efficiency and discharge capacity, reducing the inhomogeneous reactivity after 200 cycles compared with when ordinary conductive agents are deployed. Additionally, the presence of GLC@LPSCI surface suppresses the interfacial reaction between SE-cathode material, thus imparting the cell with excellent capacity retention (approximate to 90%) after 200 cycles. Furthermore, the cell performance improves even after a fourfold increase in the cathode loading amount, demonstrating the criticality of a well-developed continuous electron pathway to cell performance and highlighting the key role of ensuring a balance between the electron and ion conductivities in the development of high-energy-density and high-power ASSBs. English Wiley-VCH Verlag 2D Graphene-Like Carbon Coated Solid Electrolyte for Reducing Inhomogeneous Reactions of All-Solid-State Batteries Article 10.1002/aenm.202403247 1 Advanced Energy Materials, v.15, no.1 Advanced Energy Materials 15 1 N scie scopus 001357354300001 2-s2.0-85208203825 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article IONIC-CONDUCTIVITY LITHIUM BATTERY CATHODE all-solid-state battery graphene-like carbon coating high-energy density inhomogeneous reaction sulfide solid electrolyte