Journal Article

FZJ-2020-03937

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Combining SANS and VSANS to Extend Q-Range for Morphology Investigation of Silicon-Graphite Anodes

Paul, N. (Corresponding author) ; Frielinghaus, H.FZJ* ; Busch, S. ; Pipich, V.FZJ* ; Gilles, R.

2020
Gordon and Breach New York, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/25946  doi:10.1134/S1027451020070368

Abstract: 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.

Keyword(s): Energy (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Neutronenstreuung (JCNS-1)
3. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
2. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)

Experiment(s):

1. KWS-3: Very small angle scattering diffractometer with focusing mirror (NL3auS)
2. SANS-1: Small angle neutron scattering (NL4a)

Appears in the scientific report 2020

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Database coverage:
; Emerging Sources Citation Index ; SCOPUS ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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