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The Strategies of Constructing Stable and High Sulfur Loading Cathodes based on Blade-Casting Technique

Abstract

Although high energy lithium sulfur (Li-S) battery technology has been vigorously revisited in recent years, the practical application of Li-S batteries is still hindered due to the gap in scientific knowledge between the fundamental research and the real application need. Generally, sulfur fraction and sulfur mass loading of the sulfur electrode along with electrolyte/sulfur ratio are the crucial factors to achieve high-energy-density Li−S batteries. Here, we construct a micro-nano structured CS@CTAB/ABS+CNT electrode with a high sulfur fraction of 76 wt% and high sulfur mass loading of 6.7~11.1 mg cm-2 for Li-S battery application via the blade-casting technique. Benefiting from the unique sulfur composite design, the sulfur electrode demonstrated low polarization, high sulfur utilization and promising electrochemical stability with the thick sulfur electrodes. A high areal capacity of 6.0 mA h cm-2 over 50 cycle was achieved with a sulfur mass loading of 6.7 mg cm−2. Even the sulfur mass loading increased to 11.1 mg cm−2, the sulfur electrode still can deliver a high areal capacity of 11.22 mA h cm-2 at a low electrolyte/sulfur ratio (4:1, μL:mg). Hence, this kind of sulfur composite would put forward the possibility for the practical utilization of the high-energy-density Li−S batteries.

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Publication details

The article was received on 23 Feb 2017, accepted on 18 May 2017 and first published on 18 May 2017


Article type: Paper
DOI: 10.1039/C7TA01675A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    The Strategies of Constructing Stable and High Sulfur Loading Cathodes based on Blade-Casting Technique

    F. Zeng, A. Wang, W. Wang, Z. Jin and Y. Yang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA01675A

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