%0 Journal Article
%A Rana, Moumita
%A Rudel, Yannik
%A Heuer, Philip
%A Schlautmann, Eva
%A Rosenbach, Carolin
%A Ali, Md Yusuf
%A Wiggers, Hartmut
%A Bielefeld, Anja
%A Zeier, Wolfgang G.
%T Toward Achieving High Areal Capacity in Silicon-Based Solid-State Battery Anodes: What Influences the Rate-Performance?
%J ACS energy letters
%V 8
%N 7
%@ 2380-8195
%C Washington, DC
%I American Chemical Society
%M FZJ-2023-02511
%P 3196 - 3203
%D 2023
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001018988800001
%R 10.1021/acsenergylett.3c00722
%U https://juser.fz-juelich.de/record/1008851