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Understanding and mitigating mechanical degradation in lithium–sulfur batteries: additive manufacturing of Li₂S composites and nanomechanical particle compressions

Saccone, Max A. and Greer, Julia R. (2021) Understanding and mitigating mechanical degradation in lithium–sulfur batteries: additive manufacturing of Li₂S composites and nanomechanical particle compressions. Journal of Materials Research . ISSN 0884-2914. doi:10.1557/s43578-021-00182-w. (In Press) https://resolver.caltech.edu/CaltechAUTHORS:20210409-123059226

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Abstract

Lithium–sulfur batteries are poised to outcompete lithium-ion batteries in key sectors such as transportation and grid storage due to the low cost and high theoretical energy density of sulfur as a cathode material. Widespread implementation of this technology is hindered by significant degradation during cycling, including mechanical failure via cracking or detachment of insulating lithium sulfide (Li₂S) from the conductive matrix in the cathode, causing irreversible capacity fade. We developed a technique to additively manufacture Li₂S composites to fabricate rationally designed cathodes and demonstrate the utility of a three dimensionally architected Li₂S composite cathode in a battery. We additionally measure the yet unknown material properties and deformation mechanisms of Li₂S powders via in situ scanning electron microscope (SEM) nanomechanical experiments. Measuring these mechanical properties is a first step towards understanding the process of mechanical degradation and is necessary to enable the rational design of high energy density, long-cycling, and mechanically robust sulfur cathodes.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1557/s43578-021-00182-wDOIArticle
ORCID:
AuthorORCID
Saccone, Max A.0000-0003-3846-2908
Greer, Julia R.0000-0002-9675-1508
Alternate Title:Understanding and mitigating mechanical degradation in lithium–sulfur batteries: additive manufacturing of Li2S composites and nanomechanical particle compressions
Additional Information:© The Author(s), under exclusive licence to The Materials Research Society 2021. Received 22 January 2021; Accepted 19 March 2021; Published 09 April 2021. The authors would like to acknowledge the following people: Professor K. See for productive discussions, use of the glovebox, and coin cell materials. J. H. Kang for assistance with TGA. C. Ma for assistance with SEM/EDS. H. Zhang and B. Edwards for assistance with nanomechanical measurements. Funding: This work was supported by the Resnick Sustainability Institute. Author Contributions: MAS and JRG conceived of and designed the experiments. MAS performed the experiments. MAS and JRG wrote the manuscript. The authors declare no conflicts of interest.
Group:Resnick Sustainability Institute
Funders:
Funding AgencyGrant Number
Resnick Sustainability InstituteUNSPECIFIED
Subject Keywords:Additive manufacturing; Lithium sulfide; Li–S batteries; Emulsion; Stereolithography; Nanomechanical characterization
DOI:10.1557/s43578-021-00182-w
Record Number:CaltechAUTHORS:20210409-123059226
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210409-123059226
Official Citation:Saccone, M.A., Greer, J.R. Understanding and mitigating mechanical degradation in lithium–sulfur batteries: additive manufacturing of Li2S composites and nanomechanical particle compressions. Journal of Materials Research (2021). https://doi.org/10.1557/s43578-021-00182-w
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108676
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Apr 2021 17:39
Last Modified:12 Apr 2021 17:39

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