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Title: High-Voltage Aqueous Magnesium Ion Batteries

Journal Article · · ACS Central Science
 [1];  [2];  [2];  [2];  [2]; ORCiD logo [2];  [2];  [3]; ORCiD logo [2]
  1. Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States, Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States
  2. Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
  3. Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States

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 Mg2+ 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, Li3V2(PO4)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. 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 retaining 92% of the initial capacity after 6000 cycles, pushing the Mg ion cell to a brand new stage.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); National Science Foundation (NSF)
Grant/Contract Number:
AR0000389
OSTI ID:
1396421
Alternate ID(s):
OSTI ID: 1415275; OSTI ID: 1507705
Journal Information:
ACS Central Science, Journal Name: ACS Central Science Vol. 3 Journal Issue: 10; ISSN 2374-7943
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 219 works
Citation information provided by
Web of Science

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