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Title: Ionic liquid hybrids: Progress toward non-corrosive electrolytes with high-voltage oxidation stability for magnesium-ion based batteries

Abstract

Magnesium – ion batteries have the potential for high energy density but require new types of electrolytes for practical application. Ionic liquid (IL) electrolytes offer the opportunity for increased safety and broader voltage windows relative to traditional electrolytes. We present here a systematic study of both the conductivity and oxidative stability of hybrid electrolytes consisting of eleven ILs mixed with dipropylene glycol dimethylether (DPGDME) or acetonitrile (ACN) cosolvents and magnesium bis(trifluoromethylsulfonyl)imide (Mg(TFSI) 2). Our study finds a correlation of higher conductivity of ILs with unsaturated rings and short carbon chain lengths, but by contrast, these ILs also exhibited lower oxidation voltage limits. For the cosolvent additive, although glymes have a demonstrated capability of coordination with Mg 2+ ions, a decrease in conductivity compared to acetonitrile hybrid electrolytes was observed. Lastly, when cycled within the appropriate voltage range, the IL-hybrid electrolytes that show the highest conductivity provide the best cathode magnesiation current densities and lowest polarization as demonstrated with a Mg 0.15MnO 2 and Mg 0.07V 2O 5 cathodes.

Authors:
 [1];  [2]; ORCiD logo [2];  [2];  [3];  [3];  [4]
  1. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  2. Stony Brook Univ., NY (United States). Dept. of Chemistry
  3. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering; Stony Brook Univ., NY (United States). Dept. of Chemistry
  4. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering; Stony Brook Univ., NY (United States). Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); USDOE Office of Electricity Delivery and Energy Reliability (OE)
OSTI Identifier:
1341693
Alternate Identifier(s):
OSTI ID: 1398589
Report Number(s):
BNL-113438-2017-JA
Journal ID: ISSN 0013-4686
Grant/Contract Number:  
SC0012704; SC0012673; 1109408; 1275961
Resource Type:
Accepted Manuscript
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 219; Journal Issue: C; Journal ID: ISSN 0013-4686
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; ionic liquid; hybrids; oxidation; magnesium-ion; batteries; magnesium-ion battery; ionic liquid electrolyte; electrolyte oxidation; electrolyte conductivity; high-voltage Mg-ion cathode

Citation Formats

Huie, Matthew M., Cama, Christina A., Smith, Paul F., Yin, Jiefu, Marschilok, Amy C., Takeuchi, Kenneth J., and Takeuchi, Esther S. Ionic liquid hybrids: Progress toward non-corrosive electrolytes with high-voltage oxidation stability for magnesium-ion based batteries. United States: N. p., 2016. Web. doi:10.1016/j.electacta.2016.09.107.
Huie, Matthew M., Cama, Christina A., Smith, Paul F., Yin, Jiefu, Marschilok, Amy C., Takeuchi, Kenneth J., & Takeuchi, Esther S. Ionic liquid hybrids: Progress toward non-corrosive electrolytes with high-voltage oxidation stability for magnesium-ion based batteries. United States. doi:10.1016/j.electacta.2016.09.107.
Huie, Matthew M., Cama, Christina A., Smith, Paul F., Yin, Jiefu, Marschilok, Amy C., Takeuchi, Kenneth J., and Takeuchi, Esther S. Sat . "Ionic liquid hybrids: Progress toward non-corrosive electrolytes with high-voltage oxidation stability for magnesium-ion based batteries". United States. doi:10.1016/j.electacta.2016.09.107. https://www.osti.gov/servlets/purl/1341693.
@article{osti_1341693,
title = {Ionic liquid hybrids: Progress toward non-corrosive electrolytes with high-voltage oxidation stability for magnesium-ion based batteries},
author = {Huie, Matthew M. and Cama, Christina A. and Smith, Paul F. and Yin, Jiefu and Marschilok, Amy C. and Takeuchi, Kenneth J. and Takeuchi, Esther S.},
abstractNote = {Magnesium – ion batteries have the potential for high energy density but require new types of electrolytes for practical application. Ionic liquid (IL) electrolytes offer the opportunity for increased safety and broader voltage windows relative to traditional electrolytes. We present here a systematic study of both the conductivity and oxidative stability of hybrid electrolytes consisting of eleven ILs mixed with dipropylene glycol dimethylether (DPGDME) or acetonitrile (ACN) cosolvents and magnesium bis(trifluoromethylsulfonyl)imide (Mg(TFSI)2). Our study finds a correlation of higher conductivity of ILs with unsaturated rings and short carbon chain lengths, but by contrast, these ILs also exhibited lower oxidation voltage limits. For the cosolvent additive, although glymes have a demonstrated capability of coordination with Mg2+ ions, a decrease in conductivity compared to acetonitrile hybrid electrolytes was observed. Lastly, when cycled within the appropriate voltage range, the IL-hybrid electrolytes that show the highest conductivity provide the best cathode magnesiation current densities and lowest polarization as demonstrated with a Mg0.15MnO2 and Mg0.07V2O5 cathodes.},
doi = {10.1016/j.electacta.2016.09.107},
journal = {Electrochimica Acta},
number = C,
volume = 219,
place = {United States},
year = {2016},
month = {10}
}

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