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Title: Enhanced lithium ion transport in garnet-type solid state electrolytes

Abstract

Al-substituted Li 7La 3Zr 2O 12 samples processed under argon show enhanced Li-ion transport and interfacial properties in symmetrical cells with lithium electrodes, compared to those prepared in air. In particular, the samples prepared under argon have higher ionic conductivities and lower interfacial impedances in symmetrical lithium cells, and show better DC cycling characteristics. The electronic conductivities are also somewhat higher. Pellets subjected to thermal treatment under the two types of atmospheres have different colors but exhibit similar microstructures. X-ray diffraction experiments suggest that there are slight structural differences between the two types of samples, but few dissimilarities were observed in elemental composition, distribution of ions, oxidation states, or bond lengths using laser-induced breakdown spectroscopy (LIBS), x-ray photoelectron spectroscopy (XPS), and extended x-ray absorption fine structure spectroscopy (EXAFS) to analyze the materials. Additionally, there was no evidence that La or Zr were reduced during the processing under Ar. Possible explanations for the improved electrochemical properties of the sample prepared under Ar compared to the one prepared in air include differences in grain boundary chemistries and conductivities and/or a small concentration of oxygen vacancies in the former.

Authors:
 [1];  [2];  [3];  [3];  [4];  [3];  [4]; ORCiD logo [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); The Peac Inst. of Multiscale Sciences, Chengdu (China)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1532252
Grant/Contract Number:  
AC02-05CH11231; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Electroceramics
Additional Journal Information:
Journal Volume: 38; Journal Issue: 2-4; Journal ID: ISSN 1385-3449
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; All solid state batteries; Solid electrolytes; Li7La3Zr2O12; Garnet

Citation Formats

Cheng, Lei, Hou, Huaming, Lux, Simon, Kostecki, Robert, Davis, Ryan, Zorba, Vassilia, Mehta, Apurva, and Doeff, Marca. Enhanced lithium ion transport in garnet-type solid state electrolytes. United States: N. p., 2017. Web. doi:10.1007/s10832-017-0080-3.
Cheng, Lei, Hou, Huaming, Lux, Simon, Kostecki, Robert, Davis, Ryan, Zorba, Vassilia, Mehta, Apurva, & Doeff, Marca. Enhanced lithium ion transport in garnet-type solid state electrolytes. United States. doi:10.1007/s10832-017-0080-3.
Cheng, Lei, Hou, Huaming, Lux, Simon, Kostecki, Robert, Davis, Ryan, Zorba, Vassilia, Mehta, Apurva, and Doeff, Marca. Wed . "Enhanced lithium ion transport in garnet-type solid state electrolytes". United States. doi:10.1007/s10832-017-0080-3. https://www.osti.gov/servlets/purl/1532252.
@article{osti_1532252,
title = {Enhanced lithium ion transport in garnet-type solid state electrolytes},
author = {Cheng, Lei and Hou, Huaming and Lux, Simon and Kostecki, Robert and Davis, Ryan and Zorba, Vassilia and Mehta, Apurva and Doeff, Marca},
abstractNote = {Al-substituted Li7La3Zr2O12 samples processed under argon show enhanced Li-ion transport and interfacial properties in symmetrical cells with lithium electrodes, compared to those prepared in air. In particular, the samples prepared under argon have higher ionic conductivities and lower interfacial impedances in symmetrical lithium cells, and show better DC cycling characteristics. The electronic conductivities are also somewhat higher. Pellets subjected to thermal treatment under the two types of atmospheres have different colors but exhibit similar microstructures. X-ray diffraction experiments suggest that there are slight structural differences between the two types of samples, but few dissimilarities were observed in elemental composition, distribution of ions, oxidation states, or bond lengths using laser-induced breakdown spectroscopy (LIBS), x-ray photoelectron spectroscopy (XPS), and extended x-ray absorption fine structure spectroscopy (EXAFS) to analyze the materials. Additionally, there was no evidence that La or Zr were reduced during the processing under Ar. Possible explanations for the improved electrochemical properties of the sample prepared under Ar compared to the one prepared in air include differences in grain boundary chemistries and conductivities and/or a small concentration of oxygen vacancies in the former.},
doi = {10.1007/s10832-017-0080-3},
journal = {Journal of Electroceramics},
number = 2-4,
volume = 38,
place = {United States},
year = {2017},
month = {3}
}

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Works referenced in this record:

Fast Lithium Ion Conduction in Garnet-Type Li7La3Zr2O12
journal, October 2007

  • Murugan, Ramaswamy; Thangadurai, Venkataraman; Weppner, Werner
  • Angewandte Chemie International Edition, Vol. 46, Issue 41, p. 7778-7781
  • DOI: 10.1002/anie.200701144

Al-doped Li7La3Zr2O12 synthesized by a polymerized complex method
journal, October 2011


Crystal Chemistry and Stability of “Li7La3Zr2O12 ” Garnet: A Fast Lithium-Ion Conductor
journal, February 2011

  • Geiger, Charles A.; Alekseev, Evgeny; Lazic, Biljana
  • Inorganic Chemistry, Vol. 50, Issue 3, p. 1089-1097
  • DOI: 10.1021/ic101914e