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| Home > Publications database > Influence of State‐of‐Charge‐Dependent Decomposition Kinetics at the $Li_6PS_5Cl|LiNi_{0.83}Co_{0.11}Mn_{0.06}O_2$ Interface on Solid‐State Battery Performance |
| Journal Article | FZJ-2025-03465 |
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2025
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/celc.202500237 doi:10.34734/FZJ-2025-03465
Abstract: Solid-state batteries represent a new approach to energy storage, offering superior safety, higher energy density, and extended cycle life compared to conventional liquid electrolyte-based lithium-ion batteries. However, the practical application of solid-state batteries is hindered by degradation phenomena, particularly on interfaces between components, compromising their long-term performance. In this work, the kinetics of the state-of-charge-dependent electrolyte degradation at the LiNi0.83Co0.11Mn0.06O2│Li6PS5Cl interface, as well as its influence on cycling performance, are systematically studied electrochemically in solid-state battery half cells. Combining cycling and C-rate experiments with electrochemical impedance spectroscopy reveals that half cells charged to higher cutoff potentials (≥3.8 V versus In/InLi; ≥4.4 V versus Li+/Li) exhibit significantly faster degradation kinetics. These influence the cycling performance leading to a plateau in the charge capacity at ≥3.8 V versus In/InLi, while the electrolyte degradation does not affect the bulk electrode transport. Overall, this work emphasizes the importance to investigate state-of-charge-dependent decomposition kinetics in composite electrodes to better understand cycling behavior.
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