Microscopic Study of Solid–Solid Interfacial Reactions in All-Solid-State Batteries
The sulfide-based solid-state electrolyte has garnered attention as a potential material for next-generation all-solid-state batteries. However, during cycling, interfacial reactions between the sulfide solid-state electrolytes and the cathode can occur, which is a serious issue that needs to be add...
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Published in | Journal of physical chemistry. C Vol. 127; no. 29; pp. 14336 - 14343 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
27.07.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The sulfide-based solid-state electrolyte has garnered attention as a potential material for next-generation all-solid-state batteries. However, during cycling, interfacial reactions between the sulfide solid-state electrolytes and the cathode can occur, which is a serious issue that needs to be addressed. Therefore, resolving interfacial reactions has become a crucial issue in the development of solid-state batteries. A sulfide-based all-solid-state battery paired with LiFePO4 has shown poor first-cycle discharge capacity and efficiency, which have been attributed to LiFePO4/Li6PS5Cl interfacial reactions. Thus, in this study, the microscopic LiFePO4/Li6PS5Cl interface reactions were visualized using nano-beam X-ray fluorescence (nano-XRF) mapping and nano-beam X-ray absorption spectroscopy (nano-XAS). The mapping evolution of the Fe valence state of LFP in a different state of charge was observed. The nano-XRF and nano-XAS tools at the nanoscale allowed for the decoupling of the interfacial reactions on the cathode/sulfide, which can shed light on new directions for an in-depth understanding of the interfacial phenomena of solid-state batteries. This study paves the way for the development of all-solid-state batteries with improved performance and stability. |
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ISSN: | 1932-7447 1932-7455 |
DOI: | 10.1021/acs.jpcc.3c03045 |