| Autor: |
Jin, Feng, Fadillah, Laras, Nguyen, Hung Quoc, Sandvik, Torgeir Matre, Liu, Yu, García-Martín, Adrián, Salagre, Elena, Michel, Enrique G., Stoian, Dragos, Marshall, Kenneth, Van Beek, Wouter, Redhammer, Günther, Mehraj Ud Din, Mir, Rettenwander, Daniel |
| Zdroj: |
Chemistry of Materials; 20240101, Issue: Preprints |
| Abstrakt: |
Li6PS5Cl has attracted significant attention due to its high Li-ion conductivity and processability, facilitating large-scale solid-state battery applications. However, when paired with high-voltage cathodes, it experiences adverse side reactions. Li3InCl6(LIC), known for its higher stability at high voltages and moderate Li-ion conductivity, is considered a catholyte to address the limitations of Li6PS5Cl. To extend the stability of Li6PS5Cl toward LiNi0.8Co0.15Al0.05O2(NCA), we applied nanocrystalline LIC as a 180 nm-thick protective coating in a core–shell-like fashion (LIC@NCA) via mechanofusion. Solid-state batteries with LIC@NCA allow an initial discharge specific capacity of 148 mA h/g at 0.1C and 80% capacity retention for 200 cycles at 0.2C with a cutoff voltage of 4.2 V (vs Li/Li+), while cells without LIC coating suffers from low initial discharge capacity and poor retention. Using a wide spectrum of advanced characterization techniques, such as operando XRD, XPS, FIB-SEM, and TOF-SIMS, we reveal that the superior performance of solid-state batteries employing LIC@NCA is related to the suppression of detrimental interfacial reactions of NCA with Li6PS5Cl, delamination, and particle cracking compared to uncoated NCA. |
| Databáze: |
Supplemental Index |
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