TY  - JOUR
AU  - Rana, Moumita
AU  - Rudel, Yannik
AU  - Heuer, Philip
AU  - Schlautmann, Eva
AU  - Rosenbach, Carolin
AU  - Ali, Md Yusuf
AU  - Wiggers, Hartmut
AU  - Bielefeld, Anja
AU  - Zeier, Wolfgang G.
TI  - Toward Achieving High Areal Capacity in Silicon-Based Solid-State Battery Anodes: What Influences the Rate-Performance?
JO  - ACS energy letters
VL  - 8
IS  - 7
SN  - 2380-8195
CY  - Washington, DC
PB  - American Chemical Society
M1  - FZJ-2023-02511
SP  - 3196 - 3203
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001018988800001
DO  - DOI:10.1021/acsenergylett.3c00722
UR  - https://juser.fz-juelich.de/record/1008851
ER  -