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- W3155022752 abstract "Abstract It is still a grand challenge to achieve high performance lithium–sulfur (Li−S) batteries of high capacity, high‐rate performance and long cycling performance, especially at lean electrolyte condition. Herein, a multi‐functional composite interlayer is developed by in‐situ polymerizing pyrrole (PPy) on graphene nanosheet (PPy/G) and examined by Fourier Transformed infrared spectroscopy, X‐ray photoelectron spectroscopy and scanning electron microscopy. The graphene layers in PPy/G assure the high conductivity of the composite interlayer, while the high content of pyrrolic nitrogen sites of PPy in PPy/G composite interlayer can effectively trap the polysulfides (PSs) and promote the redox kinetics of PSs, which is valuable to suppress PSs dissolution and enhance utilization of sulfur content in Li−S batteries. Besides, the composite interlayer also facilitates the homogenous flux of Li + and inhibits the growth of Li dendrite on Li metal anode. As a result, PPy/G interlayer delivers an impressive capacity of 535 mAh g −1 at 5 C and an area capacity of 5.18 mAh cm −2 at a sulfur load of 5.8 mg cm −2 after 100 cycles. A steady capacity of 664 mAh g −1 is also accomplished in lean‐electrolyte condition after 100 cycles." @default.
- W3155022752 created "2021-04-26" @default.
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- W3155022752 date "2021-04-16" @default.
- W3155022752 modified "2023-10-18" @default.
- W3155022752 title "Polypyrrole/Graphene Composite Interlayer: High Redox Kinetics of Polysulfides and Electrochemical Performance of Lithium–Sulfur Batteries Enabled by Unique Pyrrolic Nitrogen Sites" @default.
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- W3155022752 doi "https://doi.org/10.1002/celc.202100365" @default.
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