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Title: Is alpha-V 2O 5 a cathode material for Mg insertion batteries?

Abstract

When designing a high energy density battery, one of the critical features is a high voltage, high capacity cathode material. In the development of Mg batteries, oxide cathodes that can reversibly intercalate Mg, while at the same time being compatible with an electrolyte that can deposit Mg reversibly are rare. Herein, we report the compatibility of Mg anodes with a-V 2O 5 by employing magnesium bis(trifluoromethane sulfonyl)imide in diglyme electrolytes at very low water levels. Electrolytes that contain a high water level do not reversibly deposit Mg, but interestingly these electrolytes appear to enable much higher capacities for an a-V 2O 5 cathode. Solid state NMR indicates that the major source of the higher capacity in high water content electrolytes originates from reversible proton insertion. In contrast, we found that lowering the water level of the magnesium bis(trifluoromethane sulfonyl)imide in diglyme electrolyte is critical to achieve reversible Mg deposition and direct evidence for reversible Mg intercalation is shown. Findings we report here elucidate the role of proton intercalation in water-containing electrolytes and clarify numerous conflicting reports of Mg insertion into a-V 2O 5.

Authors:
ORCiD logo; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Joint Center for Energy Storage Research (JCESR)
OSTI Identifier:
1325712
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 323; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Full cell; Mg anode; Mg battery; Non-aqueous Mg electrolyte; Proton intercalation; Solid state NMR

Citation Formats

Sa, Niya, Wang, Hao, Proffit, Danielle L., Lipson, Albert L., Key, Baris, Liu, Miao, Feng, Zhenxing, Fister, Timothy T., Ren, Yang, Sun, Cheng-Jun, Vaughey, John T., Fenter, Paul A., Persson, Kristin A., and Burrell, Anthony K. Is alpha-V2O5 a cathode material for Mg insertion batteries?. United States: N. p., 2016. Web. doi:10.1016/j.jpowsour.2016.05.028.
Sa, Niya, Wang, Hao, Proffit, Danielle L., Lipson, Albert L., Key, Baris, Liu, Miao, Feng, Zhenxing, Fister, Timothy T., Ren, Yang, Sun, Cheng-Jun, Vaughey, John T., Fenter, Paul A., Persson, Kristin A., & Burrell, Anthony K. Is alpha-V2O5 a cathode material for Mg insertion batteries?. United States. doi:10.1016/j.jpowsour.2016.05.028.
Sa, Niya, Wang, Hao, Proffit, Danielle L., Lipson, Albert L., Key, Baris, Liu, Miao, Feng, Zhenxing, Fister, Timothy T., Ren, Yang, Sun, Cheng-Jun, Vaughey, John T., Fenter, Paul A., Persson, Kristin A., and Burrell, Anthony K. Mon . "Is alpha-V2O5 a cathode material for Mg insertion batteries?". United States. doi:10.1016/j.jpowsour.2016.05.028.
@article{osti_1325712,
title = {Is alpha-V2O5 a cathode material for Mg insertion batteries?},
author = {Sa, Niya and Wang, Hao and Proffit, Danielle L. and Lipson, Albert L. and Key, Baris and Liu, Miao and Feng, Zhenxing and Fister, Timothy T. and Ren, Yang and Sun, Cheng-Jun and Vaughey, John T. and Fenter, Paul A. and Persson, Kristin A. and Burrell, Anthony K.},
abstractNote = {When designing a high energy density battery, one of the critical features is a high voltage, high capacity cathode material. In the development of Mg batteries, oxide cathodes that can reversibly intercalate Mg, while at the same time being compatible with an electrolyte that can deposit Mg reversibly are rare. Herein, we report the compatibility of Mg anodes with a-V2O5 by employing magnesium bis(trifluoromethane sulfonyl)imide in diglyme electrolytes at very low water levels. Electrolytes that contain a high water level do not reversibly deposit Mg, but interestingly these electrolytes appear to enable much higher capacities for an a-V2O5 cathode. Solid state NMR indicates that the major source of the higher capacity in high water content electrolytes originates from reversible proton insertion. In contrast, we found that lowering the water level of the magnesium bis(trifluoromethane sulfonyl)imide in diglyme electrolyte is critical to achieve reversible Mg deposition and direct evidence for reversible Mg intercalation is shown. Findings we report here elucidate the role of proton intercalation in water-containing electrolytes and clarify numerous conflicting reports of Mg insertion into a-V2O5.},
doi = {10.1016/j.jpowsour.2016.05.028},
journal = {Journal of Power Sources},
issn = {0378-7753},
number = C,
volume = 323,
place = {United States},
year = {2016},
month = {8}
}