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Issue 45, 2019
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Electrocatalysis of S-doped carbon with weak polysulfide adsorption enhances lithium–sulfur battery performance

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Abstract

Heteroatom-doped nanocarbons are beneficial for the performance improvement of lithium–sulfur batteries, and the reason is usually attributed to their strong adsorption to the soluble polysulfides. Herein, we found that, despite the weak polysulfide adsorption on hierarchical S-doped carbon nanocages (hSCNCs), the hSCNC-encapsulated sulfur cathode still exhibited better performance than the counterpart using undoped carbon nanocages, showing a high capacity of 579 mA h g−1 at 2 A g−1 after 400 cycles, and a high areal capacity of 4.7 mA h cm−2 with a high sulfur loading of 4.5 mg cm−2. The electrocatalysis-promoted mechanism of S-doped carbon was demonstrated, which facilitated polysulfide conversion and suppressed the polarization effect, thereby leading to superior performance.

Graphical abstract: Electrocatalysis of S-doped carbon with weak polysulfide adsorption enhances lithium–sulfur battery performance

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Publication details

The article was received on 17 Mar 2019, accepted on 25 Apr 2019 and first published on 26 Apr 2019


Article type: Communication
DOI: 10.1039/C9CC02134E
Chem. Commun., 2019,55, 6365-6368

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    Electrocatalysis of S-doped carbon with weak polysulfide adsorption enhances lithium–sulfur battery performance

    L. Du, X. Cheng, F. Gao, Y. Li, Y. Bu, Z. Zhang, Q. Wu, L. Yang, X. Wang and Z. Hu, Chem. Commun., 2019, 55, 6365
    DOI: 10.1039/C9CC02134E

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