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

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. Here, 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.
Authors:
 [1] ;  [1] ; ORCiD logo [1]
  1. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program & Texas Materials Inst.
Publication Date:
Grant/Contract Number:
EE0007218
Type:
Accepted Manuscript
Journal Name:
Materials Horizons
Additional Journal Information:
Journal Volume: 4; Journal Issue: 2; Journal ID: ISSN 2051-6347
Publisher:
Royal Society of Chemistry
Research Org:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE
OSTI Identifier:
1430181