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Cells with CBC/TiO2 modified separator show an initial discharge capacity of 1314 mAh g− 1 at 0.2C, and the capacity retention is 1048.5 mAh g− 1 after 50 cycles.
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The outstanding electrochemical performance of LiS cells with CBC/TiO2 modified separator shows a new approach for the application of LiS batteries.
With the N-PCNW modified separator, the pure sulfur cathode exhibits enhanced electrochemical performance, showing a high initial discharge capacity of 1430 mA h g− 1 at 0.2 C (1 C = 1675 mA h g− 1) and good long-term cycling stability at 0.5 C with 0.08% capacity fading per cycle.
The battery performances of the modified separator were also conducted.
Despite recent progress in designing modified separators for lithium-sulfur (Li-S) batteries, detail in optimizing the synergistic effect between chemical and physical immobilization for lithium polysulfides (LiPS) in modified separator hasn't been investigated totally.
Hence, the ion selective MWCNT/SPANI modified separator is promising for developing high-performance Li-S batteries employing cathodes with high sulfur loading and high sulfur content.
Moreover, the trapping of soluble polysulfide species in the cathode side was also confirmed in our designed in-operando lithium-sulfur cell with a Nafion modified separator.
Herein, we design a titanium nitride (TiN) modified separator to improve the long-term cycle stability and discharge capacity of Li-S batteries.
Herein, a carbonized bacterial cellulose/titania (CBC/TiO2) modified separator is designed to restrain the shuttle effect of LiS cells with its strong physical and chemical adsorption of polysulfides.
Regarding the modified separator, the fouling is evidently due to deposition onto outer surface.
In the case of modified separator, precipitation occurs directly onto the outer surface in opposite to the pristine membrane, for which deposition inside pores was found.
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