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Synthesis of the Se-HPCF composite via a liquid-solution route and its stable cycling performance in Li–Se batteries

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Abstract

In pursuit of a one-dimensional (1D) porous carbon framework to restrain selenium for advanced lithium–selenium batteries, the Se-hierarchical porous carbon fiber composite (Se-HPCF) is synthesized via a liquid-solution route followed by calcination treatment. The unique architecture of the HPCF, which exhibits a large surface area and high pore volume, is fabricated using sodium lignosulfonate (LN) as a green pore-forming agent via electrospinning. As a cathode material for Li–Se batteries, the Se-HPCF composite exhibits superior electrochemical performance. A reversible capacity of 533 mA h g−1 is maintained at a rate of 0.2C after 50 cycles. In addition, the Se-HPCF composite delivers high rate performance with a high specific capacity of 351 mA h g−1 at 5C. The enhanced capacity retention and rate performance of Se-HPCF is generated by the 1D structure characteristics, and the liquid phase melting diffusion method could be applied to produce other related materials.

Graphical abstract: Synthesis of the Se-HPCF composite via a liquid-solution route and its stable cycling performance in Li–Se batteries

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Supplementary files

Article information


Submitted
30 Aug 2020
Accepted
24 Sep 2020
First published
24 Sep 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

Synthesis of the Se-HPCF composite via a liquid-solution route and its stable cycling performance in Li–Se batteries

X. Chen, L. Xu, L. Zeng, Y. Wang, S. Zeng, H. Li, X. Li, Q. Qian, M. Wei and Q. Chen, Dalton Trans., 2020, Advance Article , DOI: 10.1039/D0DT03035J

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