Hyun, Gayea Park, Mihui Bae, Gwangmin Chung, Jong-woan Ham, Youngjin Cho, Seonyong Jung, Seungwon Kim, Suhwan Lee, Yong Min Kang, Yong-Mook Jeon, Seokwoo 2024-01-19T08:03:59Z 2024-01-19T08:03:59Z 2023-08-17 2023-12 1616-301X https://pubs.kist.re.kr/handle/201004/113074 The reaction kinetics at a triple-phase boundary (TPB) involving Li+, e(-), and O-2 dominate their electrochemical performances in Li-O-2 batteries. Early studies on catalytic activities at Li+/e(-)/O-2 interfaces have enabled great progress in energy efficiency; however, localized TPBs within the cathode hamper innovations in battery performance toward commercialization. Here, the effects of homogenized TPBs on the reaction kinetics in air cathodes with structurally designed pore networks in terms of pore size, interconnectivity, and orderliness are explored. The diffusion fluxes of reactants are visualized by modeling, and the simulated map reveals evenly distributed reaction areas within the periodic open structure. The 3D air cathode provides highly active, homogeneous TPBs over a real electrode scale, thus simultaneously achieving large discharge capacity, unprecedented energy efficiency, and long cyclability via mechanical/electrochemical stress relaxation. Homogeneous TPBs by cathode structural engineering provide a new strategy for improving the reaction kinetics beyond controlling the intrinsic properties of the materials. English John Wiley & Sons Ltd. Unraveling the Significance of Li+/e(-)/O-2 Phase Boundaries with a 3D-Patterned Cu Electrode for Li-O-2 Batteries Article 10.1002/adfm.202303059 1 Advanced Functional Materials, v.33, no.49 Advanced Functional Materials 33 49 N scie scopus 001040679000001 2-s2.0-85166218698 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article CATHODE ARCHITECTURE RATE CAPABILITY LI2O2 MICROSCOPY MORPHOLOGY REDUCTION MECHANISM 3D microstructures electrode structural engineering Li-O-2 batteries Li plus e- O-2 phase boundaries porous electrodes