Journal Article

FZJ-2023-02511

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Toward Achieving High Areal Capacity in Silicon-Based Solid-State Battery Anodes: What Influences the Rate-Performance?

Rana, M. (Corresponding author) ; Rudel, Y. ; Heuer, P. ; Schlautmann, E. ; Rosenbach, C. ; Ali, M. Y. ; Wiggers, H. ; Bielefeld, A. (Corresponding author) ; Zeier, W. G. (Corresponding author)FZJ*

2023
American Chemical Society Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsenergylett.3c00722  doi:10.34734/FZJ-2023-02511

Abstract: Achieving high areal capacity and rate performance in solid-state battery electrodes is challenging due to sluggish charge carrier transport through thick all-solid composite electrodes, as the transport strongly relies on the microstructure and porosity of the compressed composite. Introducing a high-capacity material like silicon for such a purpose would require fast ionic and electronic transport throughout the electrode. In this work, by designing a composite electrode containing Si nanoparticles, a superionic solid electrolyte (SE), and a carbon additive, the possibility of achieving areal capacities over 10 mAh·cm–2 and 4 mAh·cm–2 at current densities of 1.6 mA·cm–2 and 8 mA·cm–2, respectively, at room temperature is demonstrated. Using DC polarization measurements, impedance spectroscopy, microscopic analyses, and microstructure modeling, we establish that the route to achieve high-performance anode composites is microstructure modulation through attaining high silicon/solid electrolyte interface contacts, particle size compatibility of the composite components, and their well-distributed compact packing in the compressed electrode.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 20 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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