Quantitative analysis of microstructures and reaction interfaces on composite cathodes in all-solid-state batteries using a three-dimensional reconstruction technique
- Quantitative analysis of microstructures and reaction interfaces on composite cathodes in all-solid-state batteries using a three-dimensional reconstruction technique
- 이종호; 김형철; 정훈기; 최성민; 김지수; 전민재; 최성준; 정으뜸; 안준성; 임재민; 장용준; 상병인
- 3D reconstruction; composite cathode; microstructure; two-phase boundary; all-solid-state battery
- Issue Date
- ACS Applied Materials & Interfaces
- VOL 10, NO 28-23747
- The composite cathode of an all-solid-state battery composed of various solid-state components requires a dense microstructure and a highly percolated solid-state interface different from that of a conventional liquid-electrolyte-based Li-ion battery. Indeed, the preparation of such a system is particularly challenging. In this study, quantitative analyses of composite cathodes by three-dimensional reconstruction analysis were performed beyond the existing qualitative analysis, and their microstructures and reaction interfaces were successfully analyzed. Interestingly, various quantitative values of structure properties (such as the volume ratio, connectivity, tortuosity, and pore formation) associated with material optimization and process development were predicted, and they were found to result in limited electrochemical charge/discharge performances. We also verified that the effective two-phase boundaries were significantly suppressed to ∼23% of the total volume because of component dispersion and packing issues.
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