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currents (C/20, C/10), the little “dip” should be found at about 370 – 380 mAh g-1*. One can also see the significant impact of the error of NwC weight on the capacity of the lower discharge plateau, which can end up with a practical discharge capacity ranging from 950 mAh g-1 to 1270 mAh g-1 for 1 mg overestimated and underestimated sulfur masses, respectively. Therefore, the capacity variation in such situation may be as high as 320 mAh g-1. 3.3. Morphology of the electrode: before and after cycling Figure 3-4 shows typical Scanning Electron Microscope (SEM) images of ‘S-on-NwC’ electrode. From the top view (Figure 3-4 a,b), very big particles of sulfur (active material was used as received, without any pretreatment) wrapped by the conductive carbon nano-particles can be seen. Carbon fibers are not visible, as they are completely covered by the coating. Figure 3-4. SEM photos of ‘S-on-NwC’ electrode before cycling: top view (a,b), bottom side (c), and cross-section image (d). Electrode morphology resembles to the aluminum-based electrode. Images of the electrode from the bottom side, as well as the cross-section view (Figure 3-4 c,d), show that the ink rather remains on the NwC surface, without any deeper penetration throughout the collector * Based on reproducibility tests performed on a large number of ‘S-on-NwC’ electrodes, with precisely known active mass. Chapter 3: S8 electrode on NwC 76PDF Image | Accumulateur Lithium Soufre
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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
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