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Title: High-Voltage Aqueous Magnesium Ion Batteries

Nonaqueous rechargeable magnesium (Mg) batteries suffer from the complicated and moisture-sensitive electrolyte chemistry. Besides electrolytes, the practicality of a Mg battery is also confined by the absence of high-performance electrode materials due to the intrinsically slow Mg 2+ diffusion in the solids. In this work, we demonstrated a rechargeable aqueous magnesium ion battery (AMIB) concept of high energy density, fast kinetics, and reversibility. Using a superconcentration approach we expanded the electrochemical stability window of the aqueous electrolyte to 2.0 V. More importantly, two new Mg ion host materials, Li superconcentration approach we expanded the electrochemical stability window of the aqueous electrolyte to 2.0 V. More importantly, two new Mg ion host materials, Li 3V 2(PO 4) 3 and poly pyromellitic dianhydride, were developed and employed as cathode and anode electrodes, respectively. Based on comparisons of the aqueous and nonaqueous systems, the role of water is identified to be critical in the Mg ion mobility in the intercalation host but remaining little detrimental to its non-diffusion controlled process. Finally, compared with the previously reported Mg ion cell delivers an unprecedented high power density of 6400 W kg ion cell delivers an unprecedented high power density of 6400 W kg while retainingmore » 92% of the initial capacity after 6000 cycles, pushing the Mg ion cell to a brand new stage.« less
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ; ORCiD logo [2] ;  [2] ;  [3] ; ORCiD logo [2]
  1. Univ. of Maryland, College Park, MD (United States). Dept. of Chemical and Biomolecular Engineering; Army Research Lab., Adelphi, MD (United States). Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division
  2. Univ. of Maryland, College Park, MD (United States). Dept. of Chemical and Biomolecular Engineering
  3. Army Research Lab., Adelphi, MD (United States). Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division
Publication Date:
Grant/Contract Number:
AR0000389
Type:
Published Article
Journal Name:
ACS Central Science
Additional Journal Information:
Journal Volume: 3; Journal Issue: 10; Journal ID: ISSN 2374-7943
Publisher:
American Chemical Society (ACS)
Research Org:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; 25 ENERGY STORAGE
OSTI Identifier:
1396421
Alternate Identifier(s):
OSTI ID: 1415275