Exact(14)
Moreover, an excellent electronic conductivity is also crucial for high sulfur utilization.
The low electronic conductivity, however, is unfavorable for high sulfur utilization.
The composite electrode exhibits high sulfur utilization and maintains superior cycling stability in Li-S batteries with a high sulfur areal mass.
The carbon shell prevents the NanoLi2S core from directly contacting the liquid electrolyte, which improves the performance of Li/S cells to provide longer cycle life and high sulfur utilization.
To suppress the dissolution of polysulfides and maintain a high sulfur utilization of lithium-sulfur (Li-S) batteries, double-shelled hollow carbon sphere with a microporous outer carbon shell (m-DSHCS) is designed and fabricated as an efficient sulfur host.
Based on systematic electrochemical studies, the soluble polysulfide to insoluble Li2S2/Li2S conversion was identified to be the major barrier for high loading sulfur electrodes to achieve high sulfur utilization.
Similar(46)
This performance enhancement of the cell was attributed to the suppression of the polysulfide shuttle effect by a collective effect of S/GNS composite cathode and GPE, providing a higher sulfur utilization.
In particular, the nanocomposite with a loading of 60 wt% sulfur (OMC/S-60) presents the highest sulfur utilization ca. 70%, an excellent high rate capability ca. 6 C and a good cycling stability for up to 400 full charge discharge cycles.
This integrally-designed flexible host facilitates high sulfur loading, improves sulfur utilization, and suppresses effectively the parasitic shuttle.
Herein, we propose a 3D nanocarbon architecture with robust electrical "highway" network for high sulfur mass loading and efficient sulfur utilization.
However, their commercial applications are still far away mainly due to fast capacity decay in a high sulfur content caused by low utilization of active material and severe polysulfide dissolution during electrochemical cycling.
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