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Title: A high conductivity oxide–sulfide composite lithium superionic conductor

Abstract

We fabricated a hybrid superionic conductor using the space charge effect between the LLZO and LPS interfaces. This space-charge effect resulted in an improvement over the individual bulk conductivities of the two systems. Sample with higher weight fractions of LLZO are limited by the porosity and grain boundary resistance arising from non-sintered membranes. Furthermore, by combining the properties of LLZO and LPS, the high temperature sintering step has been avoided thus facilitating easier materials processing. The interfacial resistances were also measured to be minimal at ambient conditions. Our procedure thus opens a new avenue for improving the ionic conductivity and electrochemical properties of existing solid state electrolytes. High frequency impedance analyses could aid in resolving the ionic conductivity contributions from the space charge layer in the higher conducting composites while mechanical property investigations could illustrate an improvement in the composite electrolyte in comparison with the crystalline LPS membranes.

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1121804
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 2; Journal Issue: 12; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; solid electrolytes; batteries; energy storage

Citation Formats

Rangasamy, Ezhiylmurugan, Sahu, Gayatri, Keum, Jong Kahk, Rondinone, Adam J., Dudney, Nancy J., and Liang, Chengdu. A high conductivity oxide–sulfide composite lithium superionic conductor. United States: N. p., 2014. Web. doi:10.1039/c3ta15223e.
Rangasamy, Ezhiylmurugan, Sahu, Gayatri, Keum, Jong Kahk, Rondinone, Adam J., Dudney, Nancy J., & Liang, Chengdu. A high conductivity oxide–sulfide composite lithium superionic conductor. United States. https://doi.org/10.1039/c3ta15223e
Rangasamy, Ezhiylmurugan, Sahu, Gayatri, Keum, Jong Kahk, Rondinone, Adam J., Dudney, Nancy J., and Liang, Chengdu. 2014. "A high conductivity oxide–sulfide composite lithium superionic conductor". United States. https://doi.org/10.1039/c3ta15223e.
@article{osti_1121804,
title = {A high conductivity oxide–sulfide composite lithium superionic conductor},
author = {Rangasamy, Ezhiylmurugan and Sahu, Gayatri and Keum, Jong Kahk and Rondinone, Adam J. and Dudney, Nancy J. and Liang, Chengdu},
abstractNote = {We fabricated a hybrid superionic conductor using the space charge effect between the LLZO and LPS interfaces. This space-charge effect resulted in an improvement over the individual bulk conductivities of the two systems. Sample with higher weight fractions of LLZO are limited by the porosity and grain boundary resistance arising from non-sintered membranes. Furthermore, by combining the properties of LLZO and LPS, the high temperature sintering step has been avoided thus facilitating easier materials processing. The interfacial resistances were also measured to be minimal at ambient conditions. Our procedure thus opens a new avenue for improving the ionic conductivity and electrochemical properties of existing solid state electrolytes. High frequency impedance analyses could aid in resolving the ionic conductivity contributions from the space charge layer in the higher conducting composites while mechanical property investigations could illustrate an improvement in the composite electrolyte in comparison with the crystalline LPS membranes.},
doi = {10.1039/c3ta15223e},
url = {https://www.osti.gov/biblio/1121804}, journal = {Journal of Materials Chemistry. A},
issn = {2050-7488},
number = 12,
volume = 2,
place = {United States},
year = {Tue Jan 14 00:00:00 EST 2014},
month = {Tue Jan 14 00:00:00 EST 2014}
}

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