Electrochemical stability of garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 with and without atomic layer deposited-Al2O3 under CO2 and humidity

Kyle Hofstetter; Alfred Junio Samson; Jiaqi Dai; Jack Evans Gritton; Liangbing Hu; Eric D. Wachsman; Venkataraman Thangadurai

doi:10.1149/2.0201910jes

Electrochemical stability of garnet-type Li₇La_2.75Ca_0.25Zr_1.75Nb_0.25O₁₂ with and without atomic layer deposited-Al₂O₃ under CO₂ and humidity

Kyle Hofstetter, Alfred Junio Samson, Jiaqi Dai, Jack Evans Gritton, Liangbing Hu, Eric D. Wachsman, Venkataraman Thangadurai^*

^*Corresponding author for this work

School of Chemistry

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Interest toward developing all-solid-state batteries incorporating lithium-stuffed garnet electrolytes (LSGEs) has been on the constant rise. However, LSGEs are known to react with humidity, and subsequently, CO₂ during preparation or storage, leading to Li₂CO₃ formation. In this study, we report the long-term exposure effects of CO₂ and humidity on the lithium-ion conductivity of typical garnet-type Li₇La_2.75Ca_0.25Zr_1.75Nb_0.25O₁₂ with and without Al₂O₃ deposited by atomic layer deposition (ALD). The ionic conductivity of the samples was investigated by electrochemical impedance spectroscopy as a function of time for up to 1000 h. The impedance spectra of ALD-coated garnet-type Li₇La_2.75Ca_0.25Zr_1.75Nb_0.25O₁₂ sample was unaffected by long-term exposure to 400 ppm up to pure CO₂ while the uncoated garnet-type sample show at least 8% increase in total resistance. Both samples show increased resistance in the presence of humidity, but the resistance recovers upon removal of the humidity.

Original language	English
Pages (from-to)	A1844-A1852
Journal	Journal of The Electrochemical Society
Volume	166
Issue number	10
DOIs	https://doi.org/10.1149/2.0201910jes
Publication status	Published - 5 Jun 2019

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Cite this

@article{bdcaa87e049941349e4fd99dfb95bc80,

title = "Electrochemical stability of garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 with and without atomic layer deposited-Al2O3 under CO2 and humidity",

abstract = "Interest toward developing all-solid-state batteries incorporating lithium-stuffed garnet electrolytes (LSGEs) has been on the constant rise. However, LSGEs are known to react with humidity, and subsequently, CO2 during preparation or storage, leading to Li2CO3 formation. In this study, we report the long-term exposure effects of CO2 and humidity on the lithium-ion conductivity of typical garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 with and without Al2O3 deposited by atomic layer deposition (ALD). The ionic conductivity of the samples was investigated by electrochemical impedance spectroscopy as a function of time for up to 1000 h. The impedance spectra of ALD-coated garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 sample was unaffected by long-term exposure to 400 ppm up to pure CO2 while the uncoated garnet-type sample show at least 8% increase in total resistance. Both samples show increased resistance in the presence of humidity, but the resistance recovers upon removal of the humidity.",

author = "Kyle Hofstetter and Samson, {Alfred Junio} and Jiaqi Dai and Gritton, {Jack Evans} and Liangbing Hu and Wachsman, {Eric D.} and Venkataraman Thangadurai",

note = "This work was supported by the US Department of Energy ARPA-E (Contract No. DE-AR0000384). We acknowledge Drs. Amanda Mus-grove and Max Anikovskiy at the University of Calgary for their valuable help with AFM study.",

year = "2019",

month = jun,

day = "5",

doi = "10.1149/2.0201910jes",

language = "English",

volume = "166",

pages = "A1844--A1852",

journal = "Journal of The Electrochemical Society",

issn = "0013-4651",

publisher = "IOP Publishing Ltd.",

number = "10",

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TY - JOUR

T1 - Electrochemical stability of garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 with and without atomic layer deposited-Al2O3 under CO2 and humidity

AU - Hofstetter, Kyle

AU - Samson, Alfred Junio

AU - Dai, Jiaqi

AU - Gritton, Jack Evans

AU - Hu, Liangbing

AU - Wachsman, Eric D.

AU - Thangadurai, Venkataraman

N1 - This work was supported by the US Department of Energy ARPA-E (Contract No. DE-AR0000384). We acknowledge Drs. Amanda Mus-grove and Max Anikovskiy at the University of Calgary for their valuable help with AFM study.

PY - 2019/6/5

Y1 - 2019/6/5

N2 - Interest toward developing all-solid-state batteries incorporating lithium-stuffed garnet electrolytes (LSGEs) has been on the constant rise. However, LSGEs are known to react with humidity, and subsequently, CO2 during preparation or storage, leading to Li2CO3 formation. In this study, we report the long-term exposure effects of CO2 and humidity on the lithium-ion conductivity of typical garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 with and without Al2O3 deposited by atomic layer deposition (ALD). The ionic conductivity of the samples was investigated by electrochemical impedance spectroscopy as a function of time for up to 1000 h. The impedance spectra of ALD-coated garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 sample was unaffected by long-term exposure to 400 ppm up to pure CO2 while the uncoated garnet-type sample show at least 8% increase in total resistance. Both samples show increased resistance in the presence of humidity, but the resistance recovers upon removal of the humidity.

AB - Interest toward developing all-solid-state batteries incorporating lithium-stuffed garnet electrolytes (LSGEs) has been on the constant rise. However, LSGEs are known to react with humidity, and subsequently, CO2 during preparation or storage, leading to Li2CO3 formation. In this study, we report the long-term exposure effects of CO2 and humidity on the lithium-ion conductivity of typical garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 with and without Al2O3 deposited by atomic layer deposition (ALD). The ionic conductivity of the samples was investigated by electrochemical impedance spectroscopy as a function of time for up to 1000 h. The impedance spectra of ALD-coated garnet-type Li7La2.75Ca0.25Zr1.75Nb0.25O12 sample was unaffected by long-term exposure to 400 ppm up to pure CO2 while the uncoated garnet-type sample show at least 8% increase in total resistance. Both samples show increased resistance in the presence of humidity, but the resistance recovers upon removal of the humidity.

U2 - 10.1149/2.0201910jes

DO - 10.1149/2.0201910jes

M3 - Article

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SN - 0013-4651

VL - 166

SP - A1844-A1852

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

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