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Title: In-situ Multimodal Imaging and Spectroscopy of Mg Electrodeposition at Electrode-Electrolyte Interfaces

Journal Article · · Scientific Reports
DOI: https://doi.org/10.1038/srep42527 · OSTI ID:1379730
 [1];  [2];  [3];  [4];  [3];  [5];  [6];  [7];  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Materials Sciences and Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division; Xiamen Univ. (China). College of Energy
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Univ. of Illinois, Chicago, IL (United States). Dept. of Chemistry
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division; Xiamen Univ. (China). College of Chemistry and Chemical Engineering
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division; National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering
  7. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering
+ Show Author Affiliations

We report the study of Mg cathodic electrochemical deposition on Ti and Au electrode using a multimodal approach by examining the sample area in-situ using liquid cell transmission electron microscopy (TEM), scanning transmission X-ray microscopy (STXM) and X-ray absorption spectroscopy (XAS). Magnesium Aluminum Chloride Complex was synthesized and utilized as electrolyte, where non-reversible features during in situ charging-discharging cycles were observed. During charging, a uniform Mg film was deposited on the electrode, which is consistent with the intrinsic non-dendritic nature of Mg deposition in Mg ion batteries. The Mg thin film was not dissolvable during the following discharge process. We found that such Mg thin film is hexacoordinated Mg compounds by in-situ STXM and XAS. This study provides insights on the non-reversibility issue and failure mechanism of Mg ion batteries. Also, our method provides a novel generic method to understand the in situ battery chemistry without any further sample processing, which can preserve the original nature of battery materials or electrodeposited materials. This multimodal in situ imaging and spectroscopy provides many opportunities to attack complex problems that span orders of magnitude in length and time scale, which can be applied to a broad range of the energy storage systems.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0012583
OSTI ID:
1379730
Journal Information:
Scientific Reports, Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Lithium Electrode Morphology during Cycling in Lithium Cells journal January 1988
Room Temperature Magnesium Electrodeposition from Glyme-Coordinated Ammonium Amide Electrolytes journal January 2015
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Cited By (2)

In Situ Transmission Electron Microscopy Studies of Electrochemical Reaction Mechanisms in Rechargeable Batteries journal June 2019
Simultaneous activity and surface area measurements on single mesoporous nanoparticle aggregates journal January 2018

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