材料科学
阴极
电化学
三相边界
电极
电池(电)
电化学动力学
动力学
扩散
化学工程
化学动力学
化学物理
电解质
物理化学
热力学
功率(物理)
化学
物理
量子力学
工程类
固体氧化物燃料电池
作者
Gayea Hyun,Mihui Park,Gwangmin Bae,J. N. Chung,Youngjin Ham,Seonyong Cho,Seungwon Jung,Suhwan Kim,Yong Min Lee,Yong‐Mook Kang,Seokwoo Jeon
标识
DOI:10.1002/adfm.202303059
摘要
Abstract 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.
科研通智能强力驱动
Strongly Powered by AbleSci AI