Dresden 2026 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 16: Energy Storage Materials and Devices II
CPP 16.2: Vortrag
Montag, 9. März 2026, 17:45–18:00, ZEU/0260
Insight into SEI formation and dendrite growth in all-solid-state lithium metal batteries by Operando nWAXS — •Yingying Yan1, Liangzhen Liu2, Yuxin Liang1, Lyuyang Cheng1, Fabian A.C. Apfelbeck1, Guangjiu Pan1, Anton Davydok3, Christina Krywka3, Roland A. Fischer2, and Peter Müller-Buschbaum1 — 1TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany — 2TUM School of Natural Sciences, Chair of Inorganic and Metal-Organic Chemistry, Garching, Germany — 3Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, Geesthacht, Germany
Composite solid polymer electrolytes (CSPEs) have emerged as promising candidates for next-generation all-solid-state lithium batteries (ASSLBs). However, the limited ionic conductivity and poor interphase stability have seriously hindered their practical application. Herein, the anion-trapping layered double hydroxide (LDH) was introduced to enhance ionic conductivity and interfacial compatibility in poly(ethylene oxide) (PEO)-based CSPEs for stabilizing lithium metal anodes. Importantly, operando nano-focus Wide-angle X-ray scattering (nWAXS) was employed to spatially map the distribution of both the solid electrolyte interphase (SEI) layer and lithium dendrites across micron-scale lateral and vertical dimensions. Therefore, this study provides a novel strategy for designing high-performance CSPEs with stabilized interfaces and establishes an innovative approach for real-time visualization of SEI evaluation and dendrite growth in ASSLBs.
Keywords: lithium metal battery; LDH-enhanced CPEs; Operando study; nano-focus WAXS; lithium dendrite growth