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Title: A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium–sulfur batteries

Abstract

Reliable sulfur cathodes hold the key to realizing high-performance lithium–sulfur (Li–S) batteries, yet the electrochemical inefficiency and instability arising from the poor conductivity of sulfur and lithium sulfide together with polysulfide diffusion present challenges. We present here a new three-dimensional graphene aerogel embedded with in situ grown SnS2 nano-dots (SnS2-ND@G) as an efficient sulfur host. First, benefiting from a highly conductive, hierarchically porous, and mechanically self-supported architecture, the SnS2-ND@G aerogel enables the cathode to hold high sulfur content (75 wt%) and loading (up to 10 mg cm–2). Both values exceed most of the reported metal-compound-related cathode work (<60 wt% sulfur content and <3 mg cm–2 sulfur loading) in the literature. Second, this work takes advantage of a facile one-pot self-assembly fabrication, effectively guaranteeing a homogeneous deposition of SnS2 nano-dots in the graphene aerogel with a small amount of SnS2 (16 wt%). It greatly overcomes the shortcomings of physical incorporation methods to make metal-compound/carbon substrates reported in previous studies. More importantly, by rationally combining the physical entrapment from graphene and chemical adsorptivity from SnS2 nano-dots towards polysulfides, the SnS2-ND@G aerogel demonstrates remarkably improved polysulfide-trapping capability and electrochemical stability. As a result, a high peak capacity of 1234 mA h g–1, amore » high reversible capacity of 1016 mA h g–1 after 300 cycles, exceptional rate capability (C/10 – 3C rates), and impressive areal capacity (up to 11 mA h cm–2) are achieved. Furthermore, this work provides a viable path to integrate a conductive graphene network and nano-sized SnS2 as a promising cathode substrate for developing advanced Li–S batteries.« less

Authors:
 [1];  [1]; ORCiD logo [1]
  1. The Univ. of Texas at Austin, Austin, TX (United States)
Publication Date:
Research Org.:
Univ. of Texas at Austin, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1487465
Alternate Identifier(s):
OSTI ID: 1434155
Grant/Contract Number:  
EE0007218
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 6; Journal Issue: 17; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; lithium-sulfur batteries; high-loading cathodes; graphene aerogel; SnS2 nano-dots; electrochemical performance

Citation Formats

Luo, Liu, Chung, Sheng -Heng, and Manthiram, Arumugam. A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium–sulfur batteries. United States: N. p., 2018. Web. doi:10.1039/c8ta01089g.
Luo, Liu, Chung, Sheng -Heng, & Manthiram, Arumugam. A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium–sulfur batteries. United States. doi:10.1039/c8ta01089g.
Luo, Liu, Chung, Sheng -Heng, and Manthiram, Arumugam. Tue . "A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium–sulfur batteries". United States. doi:10.1039/c8ta01089g. https://www.osti.gov/servlets/purl/1487465.
@article{osti_1487465,
title = {A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium–sulfur batteries},
author = {Luo, Liu and Chung, Sheng -Heng and Manthiram, Arumugam},
abstractNote = {Reliable sulfur cathodes hold the key to realizing high-performance lithium–sulfur (Li–S) batteries, yet the electrochemical inefficiency and instability arising from the poor conductivity of sulfur and lithium sulfide together with polysulfide diffusion present challenges. We present here a new three-dimensional graphene aerogel embedded with in situ grown SnS2 nano-dots (SnS2-ND@G) as an efficient sulfur host. First, benefiting from a highly conductive, hierarchically porous, and mechanically self-supported architecture, the SnS2-ND@G aerogel enables the cathode to hold high sulfur content (75 wt%) and loading (up to 10 mg cm–2). Both values exceed most of the reported metal-compound-related cathode work (<60 wt% sulfur content and <3 mg cm–2 sulfur loading) in the literature. Second, this work takes advantage of a facile one-pot self-assembly fabrication, effectively guaranteeing a homogeneous deposition of SnS2 nano-dots in the graphene aerogel with a small amount of SnS2 (16 wt%). It greatly overcomes the shortcomings of physical incorporation methods to make metal-compound/carbon substrates reported in previous studies. More importantly, by rationally combining the physical entrapment from graphene and chemical adsorptivity from SnS2 nano-dots towards polysulfides, the SnS2-ND@G aerogel demonstrates remarkably improved polysulfide-trapping capability and electrochemical stability. As a result, a high peak capacity of 1234 mA h g–1, a high reversible capacity of 1016 mA h g–1 after 300 cycles, exceptional rate capability (C/10 – 3C rates), and impressive areal capacity (up to 11 mA h cm–2) are achieved. Furthermore, this work provides a viable path to integrate a conductive graphene network and nano-sized SnS2 as a promising cathode substrate for developing advanced Li–S batteries.},
doi = {10.1039/c8ta01089g},
journal = {Journal of Materials Chemistry. A},
number = 17,
volume = 6,
place = {United States},
year = {2018},
month = {4}
}

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Cited by: 12 works
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    Works referencing / citing this record:

    Bifunctional interlayer for capturing polysulfide in Li–S battery
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    Bifunctional interlayer for capturing polysulfide in Li–S battery
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