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Title: Systems and methods of preparing lithium sulfur electrode using sacrificial template

Abstract

Embodiments described herein relate generally to lithium sulfur batteries and methods of producing the same. As described herein, preventing coarsening of sulfur during the well-known melt-diffusion processing of cathodes allows a high areal capacity of 10.7 mAh/cm2 at current density of 3.4 mA/cm2 (C-rate of 1/5 h−1). The addition of a lithium salt, such as LiTFSI, prior to melt-diffusion can prevent coarsening of molten sulfur and allows creation of a sulfur electrode with a high concentration of triple-phase junctions for electrochemical reaction. In some embodiments, approximately 60-70% utilization of the theoretical capacity of sulfur is reached at a high loading (e.g., greater than 7.5 mg S/cm2). The electrodes are prepared in lean-electrolyte environment of 3 mlelectrolyte/gsulfur (˜70 vol % of electrolyte in the electrode) for high areal capacity in Li—S batteries.

Inventors:
; ;
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1568465
Patent Number(s):
10,319,989
Application Number:
15/905,017
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Patent
Resource Relation:
Patent File Date: 02/26/2018
Country of Publication:
United States
Language:
English

Citation Formats

Chen, Xinwei, Luo, Jiayan, and Chiang, Yet -Ming. Systems and methods of preparing lithium sulfur electrode using sacrificial template. United States: N. p., 2019. Web.
Chen, Xinwei, Luo, Jiayan, & Chiang, Yet -Ming. Systems and methods of preparing lithium sulfur electrode using sacrificial template. United States.
Chen, Xinwei, Luo, Jiayan, and Chiang, Yet -Ming. Tue . "Systems and methods of preparing lithium sulfur electrode using sacrificial template". United States. https://www.osti.gov/servlets/purl/1568465.
@article{osti_1568465,
title = {Systems and methods of preparing lithium sulfur electrode using sacrificial template},
author = {Chen, Xinwei and Luo, Jiayan and Chiang, Yet -Ming},
abstractNote = {Embodiments described herein relate generally to lithium sulfur batteries and methods of producing the same. As described herein, preventing coarsening of sulfur during the well-known melt-diffusion processing of cathodes allows a high areal capacity of 10.7 mAh/cm2 at current density of 3.4 mA/cm2 (C-rate of 1/5 h−1). The addition of a lithium salt, such as LiTFSI, prior to melt-diffusion can prevent coarsening of molten sulfur and allows creation of a sulfur electrode with a high concentration of triple-phase junctions for electrochemical reaction. In some embodiments, approximately 60-70% utilization of the theoretical capacity of sulfur is reached at a high loading (e.g., greater than 7.5 mg S/cm2). The electrodes are prepared in lean-electrolyte environment of 3 mlelectrolyte/gsulfur (˜70 vol % of electrolyte in the electrode) for high areal capacity in Li—S batteries.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

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