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Title: In-operando optical imaging of temporal and spatial distribution of polysulfides in lithium-sulfur batteries

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1252069
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 11; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-01-04 16:49:41; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Sun, Yongming, Seh, Zhi Wei, Li, Weiyang, Yao, Hongbin, Zheng, Guangyuan, and Cui, Yi. In-operando optical imaging of temporal and spatial distribution of polysulfides in lithium-sulfur batteries. Netherlands: N. p., 2015. Web. doi:10.1016/j.nanoen.2014.11.001.
Sun, Yongming, Seh, Zhi Wei, Li, Weiyang, Yao, Hongbin, Zheng, Guangyuan, & Cui, Yi. In-operando optical imaging of temporal and spatial distribution of polysulfides in lithium-sulfur batteries. Netherlands. doi:10.1016/j.nanoen.2014.11.001.
Sun, Yongming, Seh, Zhi Wei, Li, Weiyang, Yao, Hongbin, Zheng, Guangyuan, and Cui, Yi. Thu . "In-operando optical imaging of temporal and spatial distribution of polysulfides in lithium-sulfur batteries". Netherlands. doi:10.1016/j.nanoen.2014.11.001.
@article{osti_1252069,
title = {In-operando optical imaging of temporal and spatial distribution of polysulfides in lithium-sulfur batteries},
author = {Sun, Yongming and Seh, Zhi Wei and Li, Weiyang and Yao, Hongbin and Zheng, Guangyuan and Cui, Yi},
abstractNote = {},
doi = {10.1016/j.nanoen.2014.11.001},
journal = {Nano Energy},
number = C,
volume = 11,
place = {Netherlands},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nanoen.2014.11.001

Citation Metrics:
Cited by: 26works
Citation information provided by
Web of Science

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  • Lithium–sulfur (Li–S) battery is one of the most promising energy storage systems because of its high specific capacity of 1675 mAh g –1 based on sulfur. However, the rapid capacity degradation, mainly caused by polysulfide dissolution, remains a significant challenge prior to practical applications. This work demonstrates that a novel Ni-based metal organic framework (Ni-MOF), Ni 6(BTB) 4(BP) 3 (BTB = benzene-1,3,5-tribenzoate and BP = 4,4'-bipyridyl), can remarkably immobilize polysulfides within the cathode structure through physical and chemical interactions at molecular level. The capacity retention achieves up to 89% after 100 cycles at 0.1 C. Finally, the excellent performance ismore » attributed to the synergistic effects of the interwoven mesopores (~2.8 nm) and micropores (~1.4 nm) of Ni-MOF, which first provide an ideal matrix to confine polysulfides, and the strong interactions between Lewis acidic Ni(II) center and the polysulfide base, which significantly slow down the migration of soluble polysulfides out of the pores, leading to the excellent cycling performance of Ni-MOF/S composite.« less
  • Copper powder was introduced into the lithium sulfur battery system to capture intermediate polysulfides and Cu xS (x = 1 or 2) species was generated depending on the chain length of polysulfides. This phenomenon was verified by X-ray absorption near edge structure technique. The results indicated that copper can be oxidized to CuS by Li 2S x (x ≥ 6), and a mixture of Cu 2S and CuS was obtained when x ranges from 3 to 6. While Cu 2S is eventually formed in the presence of Li 2S 3. After several cycles activation, the polysulfide-shuttle effect and self-discharge phenomenonmore » which hinder the application of lithium sulfur batteries are found nearly eliminated Further experiments demonstrated that in the case of Cu 2S generation, a high specific sulfur capacity of 1300 mAh g –1 could be delivered, corresponding to 77.6% sulfur utilization, while the Coulombic efficiency approximates around 100%. As a result, self-discharge experiment further demonstrated that polysulfides almost disappear in the electrolyte, which verified the polysulfide-capture capability of copper.« less