PDF Publication Title:
Text from PDF Page: 021
specific capacity in this work has been calculated based on the mass of sulfur in the electrodes before cycling without considering the S loss during the cycling. The performance of NGNS/S composites is much better as compared to the control sample pure S, indicating that NGNS with N-functional groups are not just the contributor of improving conductivity, but have positive effect on the immobilization of S and its discharge products. However, the capacity drop with cycling indicates that the confinement effect of NGNS to S and polysulfides was still not excellent enough in the RT Na-S batteries owing to inherent structural nature of graphene as well as limited N content in NGNS. The S consumption as polysulfides which dissolved into the electrolyte could be the main reason which led to the capacity loss during cycling test. We believe by optimizing the structure and N content of NGNS, the confinement effect of S and polysulfides will be enhanced. This investigation will be conducted as our future work. Figure 7. (a) SEM image of NGNS/S-H25 electrode after 300th cycles (inset is in low resolution). (b) TEM image of Na2S in NGNS/S-H25 electrode after 300th cycles (in fully charged condition). To examine the charge transfer resistance and Na+ diffusion kinetics, electrochemical impedance spectroscopy (EIS) of the NGNS/S-H25 NGNS/S-H45, NGNS/S-H65 and NGNS/S- H86 cells has been conducted before the 1st cycle and after the 300th cycle. As the Nyquist plots 20 This article is protected by copyright. All rights reservedPDF Image | Nitrogen-Doped Graphene Nanosheets Composites as Cathode in Sodium-Sulfur Batteries
PDF Search Title:
Nitrogen-Doped Graphene Nanosheets Composites as Cathode in Sodium-Sulfur BatteriesOriginal File Name Searched:
slct-201701951.pdfDIY PDF Search: Google It | Yahoo | Bing
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
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |