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A Novel Synthetic Route for Cathode Materials of Li-S Batteries: from Organic Sulfides to Sulfur/Nitrogenous Carbon Composites

Abstract

Despite the promising high energy density at low cost, lithium sulfur batteries suffer from the fatal shuttle effect caused by intermediates dissolution during cycling, significantly shortening its cycle life. Herein, we report a facile synthesis of sulfur/carbon composite. Through a one-step calcination, nano-sized ZnS particles coated with nitrogenous carbon are directly prepared from the cheap industrial rubber vulcanization accelerators (a kind of organic sulfide), and then in-situ oxidized to obtain nitrogenous carbon coated sulfur composite, with a three dimensional cell-stacked structure. The particular frame with high level of in-situ introduced polar functional groups distribution provides rich space obstacles and chemical traps to effectively immobilize the intermediates, allowing for excellent storage performance and long-term cycle life. Outstandingly, the composite exhibits a remarkably low decay rate of 0.028% per cycle after 120 cycles at 0.1 C-rate, under the sulfur loading of 3.6 mg cm-2.

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Publication details

The article was received on 09 Jun 2017, accepted on 07 Jul 2017 and first published on 08 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA05029A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    A Novel Synthetic Route for Cathode Materials of Li-S Batteries: from Organic Sulfides to Sulfur/Nitrogenous Carbon Composites

    Q. Wang, Z. Wang, M. Yang, C. Li and D. Gu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05029A

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