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ARTICLE COMMUNICATIONS CHEMISTRY | https://doi.org/10.1038/s42004-022-00626-2 Fig. 6 Post-mortem SEM and TEM analysis of γS-CNFs after charge–discharge cycles. a SEM images of γS-CNFs after 20 discharge cycles. b SEM images of γS-CNFs after 20 charge cycles. c TEM image after 1000 cycles. d HRTEM image after discharge cycle. Fig. 7 Post-mortem XRD and XPS analysis of γ-S/CNFs after charge–discharge cycles. a–c XRD pattern of a. pristine γS-CNFs. b Discharged γS-CNFs showing conversion to Li2S. c Charged XRD pattern showing conversion to monoclinic cyclo-hexa-cyclo-deca sulfur. d–f High-resolution S2p XPS spectra of (d). Pristine γS-CNFs. e Discharged γS-CNFs displaying Li2S peak. f Charged γS-CNFs showing the presence of sulfur peak. g–f High-resolution F1s spectra of g discharged γS-CNFs, f charged γS-CNFs. did not demonstrate the formation of spherical agglomerates on the surface of CNFs often associated with LiF formation, further suggesting low LiF deposition originating from scattered sites41. It is important to note that the carbonate electrolyte is expected to be stable and not decompose in the 0.8–4.2 V vs. Li/Li+ range and the formation of LiF can be attributed to the decomposition of the salt and not the organic electrolyte as no organic species can be seen in the cycled C1s and O1s spectra (Supplementary Fig. 10). Also, at lower scan rates, no current response was recorded corresponding to possible salt decomposition (Fig. 4b). After the complete charge, S 2p spectra shows diminished Li2S peak at 161.8 eV and sulfur doublet peaks dominate the overall spectrum indicating reversible conversion of Li2S back to sulfur in the charge cycle. The presence of some Li2S even after charge may be associated with incomplete conversion due to the fast charge rate. The F1s spectra (Supplementary Fig. 9b) continue to show the 8 COMMUNICATIONS CHEMISTRY | (2022)5:17 | https://doi.org/10.1038/s42004-022-00626-2 | www.nature.com/commschem Content courtesy of Springer Nature, terms of use apply. Rights reservedPDF Image | Stabilization of gamma sulfur at room temperature
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Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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