| Autor: |
Ma, Yuan, Zhang, Ruizhuo, Ma, Yanjiao, Diemant, Thomas, Tang, Yushu, Payandeh, Seyedhosein, Goonetilleke, Damian, Kitsche, David, Liu, Xu, Lin, Jing, Kondrakov, Aleksandr, Brezesinski, Torsten |
| Zdroj: |
Chemistry of Materials; March 2024, Vol. 36 Issue: 5 p2588-2598, 11p |
| Abstrakt: |
Solid-state batteries (SSBs) utilizing superionic thiophosphate solid electrolytes (SEs), such as argyrodite Li6PS5Cl, are attracting great interest as a potential solution for safe, high-energy-density electrochemical energy storage. However, the development of high-capacity cathodes remains a major challenge. Herein, we present an effective design strategy to improve the cyclability of the layered Co-free oxide cathode active material (CAM) LiNiO2, consisting of surface modification and electrode microstructure engineering. After optimization, the SSB cells were found to deliver high capacities (qdis≈ 200 mAh/gCAM) and to cycle stably for hundreds of hours. A combination of operando and ex situ characterization techniques was employed to reveal the mechanism of optimization in overcoming several issues of LiNiO2, including poor SE compatibility, outgassing, and state-of-charge heterogeneity. Tailoring the microstructure of the composite cathode and increasing the CAM|SE interface stability enable superior electrochemical performance. |
| Databáze: |
Supplemental Index |
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