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Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
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A rechargeable Mg|O2 battery.

Kok Long Ng1, Kewei Shu2, Gisele Azimi1,2

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Researchers developed a new rechargeable magnesium-oxygen battery (RMOB) with improved performance. This advancement aims to overcome previous limitations and reignite interest in Mg-O2 battery technology.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Rechargeable magnesium-oxygen batteries (RMOBs) offer advantages like Mg's abundance and high theoretical energy density.
  • Research in RMOBs has stagnated due to poor electrochemical performance.

Purpose of the Study:

  • To present a novel RMOB system with significantly improved performance.
  • To overcome the decade-long stagnation in RMOB research.

Main Methods:

  • Utilized a magnesium (Mg) anode.
  • Employed a Mg((CF3SO2)2N)2-MgCl2 in diglyme (G2) electrolyte.
  • Used a commercial Pt/C on carbon fiber paper (Pt/C@CFP) oxygen cathode.

Main Results:

  • Achieved a discharge capacity exceeding 1.6 mAh cm⁻².
  • Demonstrated cycle lives up to 35 cycles.
  • Reached a cumulative energy density of approximately 3.2 mWh cm⁻² at room temperature.

Conclusions:

  • The developed RMOB system shows unparalleled improvement over existing technologies.
  • This work aims to revitalize the pursuit of novel Mg-O2 battery chemistries.