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10–11 Dec 2019
Marriott
Europe/Berlin timezone

Combining SANS with VSANS to extend q-range for morphology investigation of silicon-graphite anodes

11 Dec 2019, 13:30
3h
Marriott Conference room - Munich (Marriott)

Marriott Conference room - Munich

Marriott

Berliner Str. 93 80805 München Germany
300
Show room on map
Board: 27
Poster Materials Science Poster session

Speaker

Dr Neelima Paul (Technical University of Munich, Heinz Maier-Leibnitz Zentrum (MLZ))

Description

Silicon-based electrodes are attractive candidates as anodes for Li-ion batteries due to their high theoretical specific capacity. However, repeated lithiation/delithiation causes significant morphological changes of the silicon particles which results in formation of highly porous silicon structures and severe side reactions at the silicon/electrolyte interface. To quantify such morphological changes in the micrometer as well as on the nanometer scale, we combine very small-angle neutron scattering (VSANS) and small-angle neutron scattering (SANS) techniques. While conventional and contrast-matched SANS data provide insights into the solid-electrolyte-interphase (SEI) coverage around the silicon particles and filling of the evolving porosity within the electrode, VSANS data provide information on the micrometer-sized graphite particles.

Primary authors

Dr Neelima Paul (Technical University of Munich, Heinz Maier-Leibnitz Zentrum (MLZ)) Henrich Frielinghaus (JCNS) Dr Sebastian Busch (GEMS at MLZ, HZG) Vitaliy Pipich Ralph Gilles

Presentation materials

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