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Issue 21, 2017
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Enhanced electrochemical performance of sulfur on Y2O3-modified porous carbon aerogels for high performance lithium–sulfur batteries

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Abstract

Ultrafine Y2O3 modified carbon aerogels (Y-CAs) were successfully fabricated via in situ and sol–gel methods. The Y-CA materials exhibit interconnected porous structures and high adsorption ability. The Y-CA/S composites loaded with sulfur served as cathode materials in lithium–sulfur batteries to suppress the polysulfide diffusion and offer high electrical conductivity during the charge/discharge process. In particular, the designed Y2-CA/S cathode exhibits a high initial discharge capacity of 1369 mA h g−1 and retained 1108 mA h g−1 after 100 cycles at 0.2C. The Y2-CA/S cathode presents a good rate capability of 994 mA h g−1 up to 2C and nice long-term cycling stability with a high reversible capacity of 892 mA h g−1 after 300 cycles at 0.5C. The excellent electrochemical performance of the batteries is attributed to high adsorption ability and the uniform Y2O3 distribution on the porous and interrelated carbon spheres.

Graphical abstract: Enhanced electrochemical performance of sulfur on Y2O3-modified porous carbon aerogels for high performance lithium–sulfur batteries

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Publication details

The article was received on 26 Jul 2017, accepted on 13 Sep 2017 and first published on 02 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02714A
Citation: New J. Chem., 2017,41, 12726-12735
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    Enhanced electrochemical performance of sulfur on Y2O3-modified porous carbon aerogels for high performance lithium–sulfur batteries

    Z. Ding, X. Li, P. Zhang, J. Yu and Y. Hua, New J. Chem., 2017, 41, 12726
    DOI: 10.1039/C7NJ02714A

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