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Title: Synthesis and Characterization of MgCr2S4 Thiospinel as a Potential Magnesium Cathode

Abstract

Magnesium-ion batteries are a promising energy storage technology because of their higher theoretical energy density and lower cost of raw materials. Among the major challenges has been the identification of cathode materials that demonstrate capacities and voltages similar to lithium-ion systems. Thiospinels represent an attractive choice for new Mg-ion cathode materials owing to their interconnected diffusion pathways and demonstrated high cation mobility in numerous systems. Reported magnesium thiospinels, however, contain redox inactive metals such as scandium or indium, or have low voltages, such as MgTi2S4. This article describes the direct synthesis and structural and electrochemical characterization of MgCr2S4, a new thiospinel containing the redox active metal chromium and discusses its physical properties and potential as a magnesium battery cathode. However, as chromium(III) is quite stable against oxidation in sulfides, removing magnesium from the material remains a significant challenge. Early attempts at both chemical and electrochemical demagnesiation are discussed.

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [4];  [1]
  1. Northwestern University
  2. ARGONNE NATL LAB
  3. University of Illinois at Chicago
  4. Argonne National Laboratory
  5. BATTELLE (PACIFIC NW LAB)
  6. UNIVERSITY OF ILLINOIS
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1573919
Report Number(s):
PNNL-SA-147559
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Inorganic Chemistry
Additional Journal Information:
Journal Volume: 2018; Journal Issue: 57
Country of Publication:
United States
Language:
English

Citation Formats

Wustrow, Allison E., Key, Baris, Phillips, Patrick J., Sa, Niya, Lipton, Andrew S., Klie, Robert F., Vaughey, John T., and Poeppelmeier, Kenneth R. Synthesis and Characterization of MgCr2S4 Thiospinel as a Potential Magnesium Cathode. United States: N. p., 2018. Web. doi:10.1021/acs.inorgchem.8b01417.
Wustrow, Allison E., Key, Baris, Phillips, Patrick J., Sa, Niya, Lipton, Andrew S., Klie, Robert F., Vaughey, John T., & Poeppelmeier, Kenneth R. Synthesis and Characterization of MgCr2S4 Thiospinel as a Potential Magnesium Cathode. United States. doi:10.1021/acs.inorgchem.8b01417.
Wustrow, Allison E., Key, Baris, Phillips, Patrick J., Sa, Niya, Lipton, Andrew S., Klie, Robert F., Vaughey, John T., and Poeppelmeier, Kenneth R. Wed . "Synthesis and Characterization of MgCr2S4 Thiospinel as a Potential Magnesium Cathode". United States. doi:10.1021/acs.inorgchem.8b01417.
@article{osti_1573919,
title = {Synthesis and Characterization of MgCr2S4 Thiospinel as a Potential Magnesium Cathode},
author = {Wustrow, Allison E. and Key, Baris and Phillips, Patrick J. and Sa, Niya and Lipton, Andrew S. and Klie, Robert F. and Vaughey, John T. and Poeppelmeier, Kenneth R.},
abstractNote = {Magnesium-ion batteries are a promising energy storage technology because of their higher theoretical energy density and lower cost of raw materials. Among the major challenges has been the identification of cathode materials that demonstrate capacities and voltages similar to lithium-ion systems. Thiospinels represent an attractive choice for new Mg-ion cathode materials owing to their interconnected diffusion pathways and demonstrated high cation mobility in numerous systems. Reported magnesium thiospinels, however, contain redox inactive metals such as scandium or indium, or have low voltages, such as MgTi2S4. This article describes the direct synthesis and structural and electrochemical characterization of MgCr2S4, a new thiospinel containing the redox active metal chromium and discusses its physical properties and potential as a magnesium battery cathode. However, as chromium(III) is quite stable against oxidation in sulfides, removing magnesium from the material remains a significant challenge. Early attempts at both chemical and electrochemical demagnesiation are discussed.},
doi = {10.1021/acs.inorgchem.8b01417},
journal = {Inorganic Chemistry},
number = 57,
volume = 2018,
place = {United States},
year = {2018},
month = {5}
}