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Compact High Volumetric and Areal Capacity Lithium Sulfur Battery through Rock Salt induced Nano-Architectured Sulfur Host

Abstract

Tremendous efforts have been put into designing high gravimetric energy density lithium sulfur batteries (LIS) through increasing the areal sulfur loading in the cathode, however little to no attention has been paid to the volumetric energy density of LIS. Due to the low tap density of porous carbon as common sulfur hosts, an excessively high electrode thickness per sulfur loading severely decreases the volumetric energy density to the point of little practical use. For the first time, a sulfur host with an engineered polymodal particle size distribution was utilized for compact high areal capacity sulfur electrodes. This material demonstrated the highest reported blade casted volumetric capacity of 495 mAh cm-3 at 5.4 mAh cm-2 while remaining true to traditional blade casting battery manufacturing processes. Its superior electrochemical activity was demonstrated at 0.1 C by delivering capacity of 1010 mAh g-1 at 10.2 mg cm-2 and 1350 mAh g-1 at 4 mg cm-2 with good stability. Furthermore, even with its thin electrode profile of 86 µm at 4 mg cm-2, a capacity of 1103 mAh g-1 and 972 mAh g-1 at 0.2 C and 0.5 C was achieved respectively.

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Publication details

The article was received on 28 Jul 2017, accepted on 29 Aug 2017 and first published on 29 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA06657K
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Compact High Volumetric and Areal Capacity Lithium Sulfur Battery through Rock Salt induced Nano-Architectured Sulfur Host

    M. Li, Y. Zhang, F. M. Hassan, W. Ahn, X. Wang, W. Liu, G. Jiang and Z. Chen, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06657K

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