Description
ABSTRACTCharacterizing and understanding the dynamic processes at the solid/solid interface in solid-state Li-ion
batteries SSBs is crucial for designing resilient, durable, and high-energy density SSBs [1][2]. X-ray
photoelectron spectroscopy (XPS) is one of the most widely used surface analysis techniques for a
broad range of battery materials and provides valuable quantitative and chemical state information from
the surface. Unfortunately, the XPS results of SSBs are often convoluted due to the complex chemistry
involved. Operando XPS is a combined approach that enables monitoring of the chemical and electronic
properties of the electrolyte-electrode interface in SSBs [3][4][5]. Besides the surface analysis
techniques, electrochemical impedance spectroscopy (EIS) is a powerful technique for characterizing
the state of charge and state of health of battery materials. The in-house developed operando odd
random phase EIS (ORP- EIS) allows for achieving valid EIS measurements in dynamic conditions and
can reveal the continuous evolution of the interfacial phenomena [6].
In this work, we couple Operando/in-situ XPS with Operando ORP-EIS to study solid-state Li-ion
batteries. This approach provides a unique way of exploring dynamic interfacial chemistry concurrently.
Cross-section samples on the cross-section of SSBs (full-cell configuration) are prepared to enable
access to the buried interfaces. A dedicated electrochemical cell is capable of maintaining a mechanical
stuck pressure and heating the cross-section SSB samples. The control over these two parameters
allows for more realistic operating conditions during the operando characterizations. This approach
remains essential for a better understanding of the interfacial chemistry and future development of next generation
SSB systems.
| Periode | 9 jun 2024 → 14 jun 2024 |
|---|---|
| Evenementstitel | ECASIA2024 |
| Evenementstype | Conference |
| Locatie | Gothenborg, Sweden |
| Mate van erkenning | International |