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Issue 2, 2017
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Highly flexible, freestanding tandem sulfur cathodes for foldable Li–S batteries with a high areal capacity

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Abstract

Li–S batteries with a high theoretical capacity are considered as the most promising candidate to satisfy the increasing demand for batteries with a high areal capacity. However, the low sulfur loading (<2 mg cm−2) and poor flexibility of current Li–S batteries limit their application in establishing foldable Li–S batteries with a high areal capacity. To solve this problem, we employ here a free-standing flexible tandem sulfur cathode with a remarkably high sulfur loading to demonstrate foldable, high-areal-capacity Li–S batteries. The design of the tandem cathode readily increases the sulfur loading and effectively retards the migration of polysulfides. Therefore, the Li–S cell employing the tandem cathode exhibits a high initial areal capacity of 12.3 mA h cm−2 with stable cycling stability even with a high sulfur loading of up to 16 mg cm−2. These tandem cathodes are promising for foldable Li–S cells with a high areal capacity and energy density.

Graphical abstract: Highly flexible, freestanding tandem sulfur cathodes for foldable Li–S batteries with a high areal capacity

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Supplementary files

Article information


Submitted
16 Oct 2016
Accepted
04 Jan 2017
First published
05 Jan 2017

Mater. Horiz., 2017,4, 249-258
Article type
Communication

Highly flexible, freestanding tandem sulfur cathodes for foldable Li–S batteries with a high areal capacity

C. Chang, S. Chung and A. Manthiram, Mater. Horiz., 2017, 4, 249
DOI: 10.1039/C6MH00426A

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