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Title: A rationally designed polysulfide-trapping interface on the polymeric separator for high-energy Li–S batteries

Abstract

A coating layer consisting of a layer of graphene oxide (GO) inserted in between two layers of multi-walled carbon nanotubes (MWCNT) forms a multifunctional polysulfide-trapping triple-interface on the polymeric separator for lithium–sulfur (Li–S) batteries. The top and bottom highly conductive MWCNT interfaces are able to physically inhibit polysulfide diffusion and effectively reutilize the trapped active material during cycling. The inserted ultrathin GO layer with negatively charged carboxyl groups, on the other hand, electrostatically repels the migrating polysulfide anions. The stacked GO sheets also extensively prolong the migration routes of the polysulfides. Additionally, the “buffer zones” interspersed within the triple-interface accommodate the migrating polysulfides. Thus, the sandwiched separators enable Li–S cells with a high-sulfur-loading (10 mg cm -2), high areal capacity (10.9 mA h cm -2), and stable cycling ability even though the coating layer is ultra-thin (~17 μm) and light-weight (~0.23 mg cm -2).

Authors:
 [1];  [1];  [1];  [1]
  1. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program and Texas Materials Inst.
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1487265
Grant/Contract Number:  
EE0007218
Resource Type:
Accepted Manuscript
Journal Name:
Materials Today Energy
Additional Journal Information:
Journal Volume: 6; Journal Issue: C; Journal ID: ISSN 2468-6069
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Chang, Chi-Hao, Chung, Sheng-Heng, Nanda, Sanjay, and Manthiram, Arumugam. A rationally designed polysulfide-trapping interface on the polymeric separator for high-energy Li–S batteries. United States: N. p., 2017. Web. doi:10.1016/j.mtener.2017.09.001.
Chang, Chi-Hao, Chung, Sheng-Heng, Nanda, Sanjay, & Manthiram, Arumugam. A rationally designed polysulfide-trapping interface on the polymeric separator for high-energy Li–S batteries. United States. doi:10.1016/j.mtener.2017.09.001.
Chang, Chi-Hao, Chung, Sheng-Heng, Nanda, Sanjay, and Manthiram, Arumugam. Mon . "A rationally designed polysulfide-trapping interface on the polymeric separator for high-energy Li–S batteries". United States. doi:10.1016/j.mtener.2017.09.001. https://www.osti.gov/servlets/purl/1487265.
@article{osti_1487265,
title = {A rationally designed polysulfide-trapping interface on the polymeric separator for high-energy Li–S batteries},
author = {Chang, Chi-Hao and Chung, Sheng-Heng and Nanda, Sanjay and Manthiram, Arumugam},
abstractNote = {A coating layer consisting of a layer of graphene oxide (GO) inserted in between two layers of multi-walled carbon nanotubes (MWCNT) forms a multifunctional polysulfide-trapping triple-interface on the polymeric separator for lithium–sulfur (Li–S) batteries. The top and bottom highly conductive MWCNT interfaces are able to physically inhibit polysulfide diffusion and effectively reutilize the trapped active material during cycling. The inserted ultrathin GO layer with negatively charged carboxyl groups, on the other hand, electrostatically repels the migrating polysulfide anions. The stacked GO sheets also extensively prolong the migration routes of the polysulfides. Additionally, the “buffer zones” interspersed within the triple-interface accommodate the migrating polysulfides. Thus, the sandwiched separators enable Li–S cells with a high-sulfur-loading (10 mg cm-2), high areal capacity (10.9 mA h cm-2), and stable cycling ability even though the coating layer is ultra-thin (~17 μm) and light-weight (~0.23 mg cm-2).},
doi = {10.1016/j.mtener.2017.09.001},
journal = {Materials Today Energy},
number = C,
volume = 6,
place = {United States},
year = {2017},
month = {9}
}

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Cited by: 8 works
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Figures / Tables:

Scheme 1 Scheme 1: Fabrication processes of (a) the poached-egg-shaped, (b) the edge-free, and (c) the vacuum-filtration-free cathodes.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.