Journal
NANOSCALE
Volume 6, Issue 16, Pages 9579-9587Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr02498b
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Funding
- National Natural Science Foundation of China [21171015, 21373195]
- Recruitment Program of Global Experts
- Program for New Century Excellent Talents in University (NCET)
- Fundamental Research Funds for the Central Universities [WK2060140014, WK2060140016]
- sofja kovalevskaja award from Alexander von Humboldt Foundation
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Flexible and free-standing sulphur/(PCNFs-CNT) composite (ScaPCNFs-CNT) electrode was successfully prepared by infiltrating sulfur into microporous carbon nanofibers-carbon nanotube (PCNFs-CNT) composite. When used as a cathode material for Li-S batteries, the S@PCNFs-CNT exhibits much better cycle performance and rate performance compared to CNT-free S@PCNFs. It delivers a reversible capacity of 637 mA h g(-1) after 100 cycles at 50 mA g(-1) and a rate capability of 437 mA h g(-1) at 1 A g(-1). The improved electrochemical performance is attributed to synergistic effect of the 3D interconnected structure, the additive of CNT, and the uniform distribution of micropores (<2 nm) in the PCNFs-CNT matrix. Our results indicate the potential suitability of PCNFs-CNT for efficient, free-standing, and high-performance batteries.
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