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Title: Anomalous interfacial stress generation during sodium intercalation/extraction in MoS 2 thin-film anodes

Abstract

Although the generation of mechanical stress in the anode material is suggested as a possible reason for electrode degradation and fading of storage capacity in batteries, only limited knowledge of the electrode stress and its evolution is available at present. Here, we show real-time monitoring of the interfacial stress of a few-layer MoS 2 system under the sodiation/desodiation process using microcantilever electrodes. During the first sodiation with a voltage plateau of 1.0 to 0.85 V, the MoS 2 exhibits a compressive stress (2.1 Nm -1), which is substantially smaller than that measured (9.8 Nm -1) during subsequent plateaus at 0.85 to 0.4 V due to the differential volume expansion of the MoS 2film. The conversion reaction to Mo below 0.1 V generates an anomalous compressive stress of 43 Nm -1with detrimental effects. These results also suggest the existence of a separate discharge stage between 0.6 and 0.1 V, where the generated stress is only approximately one-third of that observed below 0.1 V. This approach can be adapted to help resolve the localized stress in a wide range of electrode materials, to gain additional insights into mechanical effects of charge storage, and for long-lifetime battery design.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Univ. of Alberta, Edmonton, AB (Canada)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Alberta, Edmonton, AB (Canada); The State University of New York, Buffalo, NY (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1490580
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Li, Zhi, Jiang, Keren, Khan, Faheem, Goswami, Ankur, Liu, Jun, Passian, Ali, and Thundat, Thomas. Anomalous interfacial stress generation during sodium intercalation/extraction in MoS 2 thin-film anodes. United States: N. p., 2019. Web. doi:10.1126/sciadv.aav2820.
Li, Zhi, Jiang, Keren, Khan, Faheem, Goswami, Ankur, Liu, Jun, Passian, Ali, & Thundat, Thomas. Anomalous interfacial stress generation during sodium intercalation/extraction in MoS 2 thin-film anodes. United States. doi:10.1126/sciadv.aav2820.
Li, Zhi, Jiang, Keren, Khan, Faheem, Goswami, Ankur, Liu, Jun, Passian, Ali, and Thundat, Thomas. Wed . "Anomalous interfacial stress generation during sodium intercalation/extraction in MoS 2 thin-film anodes". United States. doi:10.1126/sciadv.aav2820. https://www.osti.gov/servlets/purl/1490580.
@article{osti_1490580,
title = {Anomalous interfacial stress generation during sodium intercalation/extraction in MoS 2 thin-film anodes},
author = {Li, Zhi and Jiang, Keren and Khan, Faheem and Goswami, Ankur and Liu, Jun and Passian, Ali and Thundat, Thomas},
abstractNote = {Although the generation of mechanical stress in the anode material is suggested as a possible reason for electrode degradation and fading of storage capacity in batteries, only limited knowledge of the electrode stress and its evolution is available at present. Here, we show real-time monitoring of the interfacial stress of a few-layer MoS2 system under the sodiation/desodiation process using microcantilever electrodes. During the first sodiation with a voltage plateau of 1.0 to 0.85 V, the MoS2 exhibits a compressive stress (2.1 Nm-1), which is substantially smaller than that measured (9.8 Nm-1) during subsequent plateaus at 0.85 to 0.4 V due to the differential volume expansion of the MoS2film. The conversion reaction to Mo below 0.1 V generates an anomalous compressive stress of 43 Nm-1with detrimental effects. These results also suggest the existence of a separate discharge stage between 0.6 and 0.1 V, where the generated stress is only approximately one-third of that observed below 0.1 V. This approach can be adapted to help resolve the localized stress in a wide range of electrode materials, to gain additional insights into mechanical effects of charge storage, and for long-lifetime battery design.},
doi = {10.1126/sciadv.aav2820},
journal = {Science Advances},
number = 1,
volume = 5,
place = {United States},
year = {2019},
month = {1}
}

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Works referenced in this record:

In Situ Observation of the Electrochemical Lithiation of a Single SnO2 Nanowire Electrode
journal, December 2010