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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Interfaces and Thin Films II (joint session CPP/DY/O)

CPP 37.8: Vortrag

Dienstag, 17. März 2020, 11:45–12:00, ZEU 260

Revealing Lithium Transport Processes in Lithium-Ion Battery Anodes Using Neutron Depth Profiling — •Markus Trunk^1,2, Fabian Linsenmann³, Philip Rapp³, Jamie Weaver⁴, Lukas Werner¹, Roman Gernhäuser¹, Ralph Gilles², Bastian Märkisch¹, Zsolt Revay², and Hubert Gasteiger³ — ¹TUM, Physik-Department, Garching — ²TUM, Heinz Maier-Leibnitz Zentrum, Garching — ³TUM, Lehrstuhl für Technische Elektrochemie, Chemie Department, Garching — ⁴Material Measurement Laboratory, NIST, Gaithersburg, Maryland

Neutron Depth Profiling (NDP) is a non-destructive, isotope-specific, high-resolution nuclear analytical technique, which is often used to probe lithium or boron concentration profiles in different thin substrates. NDP provides depth sensitivities up to a few ten nanometers and the maximum viewing depth is limited to tens of micrometers. The non-destructive nature of the measurement is of special interest for lithium-ion batteries, where the lithium transport processes can be studied during operation. However, due to the limited viewing depth a special battery cell design is required, which is transparent for the charged particles while ensuring an undisturbed battery performance even at low ambient pressures. We present NDP measurements on lithium-ion batteries performed using a newly developed cell design and discuss insights into the lithium transport processes occurring in the anode material during battery operation.