Kim, Hun Min, Kyeong-Jun Jeong, Min-Gi Jung, Hun-Gi Sun, Yang-Kook 2024-01-19T11:02:12Z 2024-01-19T11:02:12Z 2022-10-20 2022-10 1944-8244 https://pubs.kist.re.kr/handle/201004/114490 Lithium-oxygen batteries (LOBs) have attracted worldwide attention due to their high specific energy. However, the poor rechargeability and cycling stability of LOBs hinders their practical use in applications. Here, we explore the incomplete charging behavior of redox-mediated LOBs operated at a feasible capacity for a practical level (3.25 mAh cm-2) and resolve it using a sustainable lithium protection strategy. The incomplete charging behavior, promoted by self-discharge of redox mediators (RMs), hampers the reversible cycling of LOBs, which was investigated through multiangle in situ and ex situ analyses. Meanwhile, the proposed lithium protection strategy, introducing an inorganic/ organic hybrid artificial composite layer with a preformed stable interface between the lithium metal and the composite layer, enhances the stability of the lithium metal anode during the prolonged cycling by preventing the chemical/electrochemical interactions of RMs on the lithium metal surface, thus improving the overall rechargeability of LOBs. This work provides guidelines for the effective use of RMs with an adequate lithium protection strategy to achieve sustainable cycling of LOBs, creating a feasible approach for the practical use of LOBs with high areal capacity. English American Chemical Society Resolving the Incomplete Charging Behavior of Redox-Mediated Li-O2 Batteries via Sustainable Protection of Li Metal Anode Article 10.1021/acsami.2c14349 1 ACS Applied Materials & Interfaces, v.14, no.40, pp.45945 - 45953 ACS Applied Materials & Interfaces 14 40 45945 45953 N scie scopus 000864723300001 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article STABILITY LAYER LIMITATIONS DISCHARGE LITHIUM-OXYGEN BATTERIES ELECTROLYTE lithium-oxygen batteries lithium metal protection artificial protection layer redox mediator incomplete charging behavior