Fig. 2: Characterizations of the SSC material and its sieving-pore structure. | Nature Communications

Fig. 2: Characterizations of the SSC material and its sieving-pore structure.

From: Sieving pore design enables stable and fast alloying chemistry of silicon negative electrodes in Li-ion batteries

Fig. 2

a Schematic of the synthetic procedure of SSC materials and the comparisons between the customized-micropore, undersized-pore, and oversized-pore PC supports for fabricating sieving pores. The PC support is illustrated as a grey pore, while the yellow and black irregular shapes represent the deposited Si layers and carbon layers, respectively. b SEM images of SSC particles. c–e Spherical aberration-corrected HAADF-STEM and corresponding EDS mapping of SSC samples. f SAXS curves of PC, SC, and SSC samples. Inset: the calculated SSA of these three samples. g N2 (77 K) and CO2 (273 K) adsorption-desorption isotherms of SC, SC with different C2H2 deposition times, and SSC samples. h Pore size distributions derived from CO2 adsorption-desorption isotherms, based on the non-local density functional theory (NLDFT) model, for SC, SC samples with different C2H2 deposition times, and SSC samples.

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