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Title: A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry

Abstract

Lithium–sulfur batteries are among the most promising low-cost, high-energy-density storage devices. However, the inability to host a sufficient amount of sulfur in the cathode while maintaining good electrochemical stability under a lean electrolyte condition has limited the progress. The main cause of these challenges is the sensitivity of the sulfur cathode to the cell-design parameters (i.e., the amount of sulfur and electrolyte) and the experimental testing conditions (i.e., cycling rates and analysis duration). Here, a hot-pressing method is presented that effectively encapsulates a high amount of sulfur in the cathode within only 5 s, resulting in high sulfur loading and content of, respectively, 10 mg cm -2 and 65 wt%. The hot-pressed sulfur (HPS) cathodes exhibit superior dynamic and static electrochemical performance under a broad cycling-rate (C/20–1C rates) and low electrolyte/sulfur ratio (6 µL mg -1) conditions. The dynamic cell stability is demonstrated by high gravimetric and areal capacities of, respectively, 415–730 mAh g -1 and 7–12 mAh cm -2 at C/20–1C rates with a high capacity retention of over 70% after 200 cycles. As a result, the static cell stability is demonstrated by excellent shelf life with low self-discharge and stable cycle life on storing for over one year.

Authors:
 [1];  [1]; ORCiD logo [1]
  1. 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:
1488291
Alternate Identifier(s):
OSTI ID: 1479580
Grant/Contract Number:  
EE0007218
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 46; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; electrochemical stability; high loading; hot‐pressing; lean electrolyte; lithium–sulfur batteries

Citation Formats

Chung, Sheng -Heng, Lai, Ke -Yu, and Manthiram, Arumugam. A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry. United States: N. p., 2018. Web. doi:10.1002/adma.201805571.
Chung, Sheng -Heng, Lai, Ke -Yu, & Manthiram, Arumugam. A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry. United States. doi:10.1002/adma.201805571.
Chung, Sheng -Heng, Lai, Ke -Yu, and Manthiram, Arumugam. Thu . "A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry". United States. doi:10.1002/adma.201805571.
@article{osti_1488291,
title = {A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry},
author = {Chung, Sheng -Heng and Lai, Ke -Yu and Manthiram, Arumugam},
abstractNote = {Lithium–sulfur batteries are among the most promising low-cost, high-energy-density storage devices. However, the inability to host a sufficient amount of sulfur in the cathode while maintaining good electrochemical stability under a lean electrolyte condition has limited the progress. The main cause of these challenges is the sensitivity of the sulfur cathode to the cell-design parameters (i.e., the amount of sulfur and electrolyte) and the experimental testing conditions (i.e., cycling rates and analysis duration). Here, a hot-pressing method is presented that effectively encapsulates a high amount of sulfur in the cathode within only 5 s, resulting in high sulfur loading and content of, respectively, 10 mg cm-2 and 65 wt%. The hot-pressed sulfur (HPS) cathodes exhibit superior dynamic and static electrochemical performance under a broad cycling-rate (C/20–1C rates) and low electrolyte/sulfur ratio (6 µL mg-1) conditions. The dynamic cell stability is demonstrated by high gravimetric and areal capacities of, respectively, 415–730 mAh g-1 and 7–12 mAh cm-2 at C/20–1C rates with a high capacity retention of over 70% after 200 cycles. As a result, the static cell stability is demonstrated by excellent shelf life with low self-discharge and stable cycle life on storing for over one year.},
doi = {10.1002/adma.201805571},
journal = {Advanced Materials},
number = 46,
volume = 30,
place = {United States},
year = {Thu Oct 04 00:00:00 EDT 2018},
month = {Thu Oct 04 00:00:00 EDT 2018}
}

Journal Article:
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Works referenced in this record:

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