Hierarchical sulfur electrodes as a testing platform for understanding the high-loading capability of Li-S batteries

Chung, Sheng-Heng; Chang, Chi-Hao; Manthiram, Arumugam

doi:10.1016/j.jpowsour.2016.10.023

Hierarchical sulfur electrodes as a testing platform for understanding the high-loading capability of Li-S batteries

Journal Article · Wed Oct 12 00:00:00 EDT 2016 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2016.10.023· OSTI ID:1487250

Chung, Sheng-Heng ^[1]; Chang, Chi-Hao ^[2]; Manthiram, Arumugam ^[2]

Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program & Texas Materials Inst.; University of Texas at Austin
Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program & Texas Materials Inst.

Lithium-sulfur (Li-S) batteries are considered as an attractive electrochemical energy storage system due to the high theoretical capacity of sulfur (1,675 mA h g^-1). However, high-loading sulfur cathodes would need to be employed for the Li-S cells to be practical, but the resulting poor cell cyclability and severe electrode degradation hamper their development. Here in this paper, we present a hierarchical sulfur cathode as a testing platform for understanding the high-loading capability of Li-S batteries. The hierarchical cathode presents good electrochemical utilization of above 70%, stable cyclability for 500–1,000 cycles, and high sulfur loadings of 4.2–10.0 mg cm^-2. The exploration of the activation and the polysulfide-retention processes of the high-loading cathodes illustrates that the electrochemical stability mainly results from the stabilization of dissolved polysulfides within the cathode region as the electrochemically active catholyte. Therefore, the utilization of stabilized polysulfide migration might be a meaningful opportunity for designing high-loading cathodes and further improving their electrochemical stability and long-term cyclability.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0007218

OSTI ID:: 1487250

Alternate ID(s):: OSTI ID: 1397464

Journal Information:: Journal of Power Sources, Journal Name: Journal of Power Sources Journal Issue: C Vol. 334; ISSN 0378-7753

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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