Abstract
The widespread application of Li–S batteries is severely hampered due to the inferior intrinsic conductivity of sulfur, shuttling effects of polysulfides, and volume change of sulfur cathodes. To boost the performance, a highly microporous Schiff-base polymer (HMSP) with linear structure has been synthesized through a facile synthetic strategy and was employed as the hosts for sulfur cathodes. The HMSP offered an impressive specific surface area of 239.2 m2 g−1 with abundant micropores at 1.5 nm, ensuring fast ion and charge transport, and resisting volume change of the electrode. The high N and O contents are beneficial to absorb the polysulfides, reducing the shuttling effect. Benefiting from the above advantages, the HMSP/S cathode generated an initial discharge capacity of 935.5 mAh g−1 at 0.2 C, and robust durability. This work not only developed a facile synthetic route for HMSP but also expanded the application of HMSP in Li–S batteries.
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Acknowledgements
The authors sincerely thank the support from the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJA460002) and the Natural Science Foundation of Jiangsu University of Technology (No. KYY18041).
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Hu, M., Chen, Y., Jia, H. et al. A facile synthetic strategy for highly microporous Schiff-base polymer as sulfur hosts for lithium-sulfur batteries. Ionics 27, 4259–4267 (2021). https://doi.org/10.1007/s11581-021-04210-x
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DOI: https://doi.org/10.1007/s11581-021-04210-x