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A rechargeable metal-free full-liquid sulfur–bromine battery for sustainable energy storage

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Abstract

The broad application of lithium–sulfur technology is far from viable unless the obstacles associated with the dissolution of the sulfur cathode and the dendrite-growth related battery failure arising from the use of a metallic lithium anode are addressed. Taking advantage of the highly soluble sulfur species, this work explores the possibility of using redox-active species with highly positive potential to couple with a sulfur anolyte for a redox flow battery. When paired with an aqueous bromide catholyte, a sulfur–bromine (S–Br2) battery with the desired metal-free characteristic is successfully demonstrated. The battery exhibits a cell voltage exceeding 1.8 V, a specific capacity of ∼1600 mA h g−1, coulombic efficiency approaching 100% and decent cycling efficiencies over 100 cycles. A full-liquid flow-through mode is able to be realized with a controlled depth of charge. Moreover, a high energy density can be expected with highly concentrated electrolytes, guaranteeing a promising sustainable energy storage technology candidate for both stationary and mobile applications.

Graphical abstract: A rechargeable metal-free full-liquid sulfur–bromine battery for sustainable energy storage

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Publication details

The article was received on 15 Aug 2018, accepted on 04 Oct 2018 and first published on 05 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA07951J
Citation: J. Mater. Chem. A, 2018, Advance Article
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    A rechargeable metal-free full-liquid sulfur–bromine battery for sustainable energy storage

    L. Wang, X. Wang, J. Liu, H. Yang, C. Fu, Y. Xia and T. Liu, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA07951J

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