Synthesis of model sodium sulfide films

Rebecca D. McAuliffe; Victoria Petrova; Matthew J. McDermott; Jameson Landon Tyler; Ethan C. Self; Kristin A. Persson; Ping Liu; Gabriel M. Veith

doi:10.1116/6.0001069

Synthesis of model sodium sulfide films

Rebecca D. McAuliffe, Victoria Petrova, Matthew J. McDermott, Jameson Landon Tyler, Ethan C. Self, Kristin A. Persson, Ping Liu, Gabriel M. Veith

Energy Storage & Conversion

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5 Scopus citations

Abstract

We report the direct deposition of model sodium sulfide films by RF magnetron sputtering from Na₂S and Na₂S₂ deposition targets. Analytical characterization and electrochemical cycling indicate that the deposited films are amorphous with stoichiometries that correspond to Na₂S₃ and Na₂S₂ formed from the Na₂S and Na₂S₂ targets, respectively. We propose that the loss of Na in the case of the Na₂S target is due to preferential sputtering of Na resulting from the higher energy required to break the Na-S bonds in Na₂S. The development of thin film sodium sulfides opens a new route to understanding their fundamental properties, such as Na⁺ transport, conductivity, and reactivity.

Original language	English
Article number	053404
Journal	Journal of Vacuum Science and Technology, Part A: Vacuum, Surfaces and Films
Volume	39
Issue number	5
DOIs	https://doi.org/10.1116/6.0001069
State	Published - Sep 1 2021

Funding

This work was supported as part of GENESIS: A Next Generation Synthesis Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-SC0019212. This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/ doe-public-access-plan). This work was performed in part at the San Diego Nanotechnology Infrastructure (SDNI) of UCSD, a member of the National Nanotechnology Coordinated Infra-structure (NNCI), which is supported by the National Science Foundation (Grant No. ECCS-1542148). The authors would like to thank Ryan Kingsbury for assistance with the calculated thermodynamic data and Shyam Dwarkanath for helpful discussions.

Funders	Funder number
NNCI
National Nanotechnology Coordinated Infra-structure
National Science Foundation	ECCS-1542148
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-AC05-00OR22725, DE-SC0019212

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abstract = "We report the direct deposition of model sodium sulfide films by RF magnetron sputtering from Na2S and Na2S2 deposition targets. Analytical characterization and electrochemical cycling indicate that the deposited films are amorphous with stoichiometries that correspond to Na2S3 and Na2S2 formed from the Na2S and Na2S2 targets, respectively. We propose that the loss of Na in the case of the Na2S target is due to preferential sputtering of Na resulting from the higher energy required to break the Na-S bonds in Na2S. The development of thin film sodium sulfides opens a new route to understanding their fundamental properties, such as Na+ transport, conductivity, and reactivity.",

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AU - McAuliffe, Rebecca D.

AU - Petrova, Victoria

AU - McDermott, Matthew J.

AU - Tyler, Jameson Landon

AU - Self, Ethan C.

AU - Persson, Kristin A.

AU - Liu, Ping

AU - Veith, Gabriel M.

PY - 2021/9/1

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AB - We report the direct deposition of model sodium sulfide films by RF magnetron sputtering from Na2S and Na2S2 deposition targets. Analytical characterization and electrochemical cycling indicate that the deposited films are amorphous with stoichiometries that correspond to Na2S3 and Na2S2 formed from the Na2S and Na2S2 targets, respectively. We propose that the loss of Na in the case of the Na2S target is due to preferential sputtering of Na resulting from the higher energy required to break the Na-S bonds in Na2S. The development of thin film sodium sulfides opens a new route to understanding their fundamental properties, such as Na+ transport, conductivity, and reactivity.

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Synthesis of model sodium sulfide films

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