Advanced Energy Materials, volume 5, issue 11, pages 1500096

A Tale of Two Sites: On Defining the Carrier Concentration in Garnet‐Based Ionic Conductors for Advanced Li Batteries

Travis Thompson 1
Asma Sharafi 1
Michelle Johannes 2
Ashfia Huq 3
Jan Allen 4
Jeff Wolfenstine 4
2
 
Center for Computational Materials Science; Naval Research Laboratory; Anacostia VA 20375 USA
4
 
RDRL-SED-C; Army Research Laboratory; 2800 Powder Mill Road Adelphi MD 20783 USA
Publication typeJournal Article
Publication date2015-03-21
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor27.8
ISSN16146832, 16146840
General Materials Science
Renewable Energy, Sustainability and the Environment
Abstract

Solid electrolytes based on the garnet crystal structure have recently been identified as a promising material to enable advance Li battery cell chemistries because of the unprecedented combination of high ionic conductivity and electrochemical stability against metallic Li. To better understand the mechanisms that give rise to high conductivity, the goal of this work is to correlate Li site occupancy with Li‐ion transport. Toward this goal, the Li site occupancy is studied in cubic garnet as a function of Li concentration over the compositions range: Li7−xLa3Zr2−xTaxO12 (x = 0.5, 0.75, and 1.5). The distribution of Li between the two interstitial sites (24d and 96h) is determined using neutron and synchrotron diffraction. The bulk conductivity is measured on >97% relative density polycrystalline specimens to correlate Li‐ion transport as a function of Li site occupancy. It is determined that the conductivity changes nonlinearly with the occupancy of the octahedral (96h) Li site. It is shown that the effective carrier concentration is dependent on the Li site occupancy and suggests that this is a consequence of significant carrier–carrier coulombic interactions. Furthermore, the observation of maximum conductivity near Li = 6.5 mol is explained.

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Thompson T. et al. A Tale of Two Sites: On Defining the Carrier Concentration in Garnet‐Based Ionic Conductors for Advanced Li Batteries // Advanced Energy Materials. 2015. Vol. 5. No. 11. p. 1500096.
GOST all authors (up to 50) Copy
Thompson T., Sharafi A., Johannes M., Huq A., Allen J., Wolfenstine J., Sakamoto J. A Tale of Two Sites: On Defining the Carrier Concentration in Garnet‐Based Ionic Conductors for Advanced Li Batteries // Advanced Energy Materials. 2015. Vol. 5. No. 11. p. 1500096.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1002/aenm.201500096
UR - https://onlinelibrary.wiley.com/doi/10.1002/aenm.201500096
TI - A Tale of Two Sites: On Defining the Carrier Concentration in Garnet‐Based Ionic Conductors for Advanced Li Batteries
T2 - Advanced Energy Materials
AU - Thompson, Travis
AU - Sharafi, Asma
AU - Johannes, Michelle
AU - Huq, Ashfia
AU - Allen, Jan
AU - Wolfenstine, Jeff
AU - Sakamoto, Jeff
PY - 2015
DA - 2015/03/21 00:00:00
PB - Wiley
SP - 1500096
IS - 11
VL - 5
SN - 1614-6832
SN - 1614-6840
ER -
BibTex |
Cite this
BibTex Copy
@article{2015_Thompson,
author = {Travis Thompson and Asma Sharafi and Michelle Johannes and Ashfia Huq and Jan Allen and Jeff Wolfenstine and Jeff Sakamoto},
title = {A Tale of Two Sites: On Defining the Carrier Concentration in Garnet‐Based Ionic Conductors for Advanced Li Batteries},
journal = {Advanced Energy Materials},
year = {2015},
volume = {5},
publisher = {Wiley},
month = {mar},
url = {https://onlinelibrary.wiley.com/doi/10.1002/aenm.201500096},
number = {11},
pages = {1500096},
doi = {10.1002/aenm.201500096}
}
MLA
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MLA Copy
Thompson, Travis, et al. “A Tale of Two Sites: On Defining the Carrier Concentration in Garnet‐Based Ionic Conductors for Advanced Li Batteries.” Advanced Energy Materials, vol. 5, no. 11, Mar. 2015, p. 1500096. https://onlinelibrary.wiley.com/doi/10.1002/aenm.201500096.
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