4.7 Article

Revealing instability and irreversibility in nonaqueous sodium-O2 battery chemistry

Journal

CHEMICAL COMMUNICATIONS
Volume 52, Issue 62, Pages 9691-9694

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cc02291j

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Funding

  1. Skoltech-MIT Center for Electrochemical Energy Storage
  2. Natural Sciences and Engineering Research Council (NSERC) of Canada
  3. China Clean Energy Research Center-Clean Vehicles Consortium
  4. US Department of Energy [DE-PI00000012]
  5. Toyota Motor Europe
  6. US Department of Defense
  7. Samsung Advanced Institute of Technology (SAIT)

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Charging kinetics and reversibility of Na-O-2 batteries can be influenced greatly by the particle size of NaO2 formed upon discharge, and exposure time (reactivity) of NaO2 to the electrolyte. Micrometer-sized NaO2 cubes formed at high discharge rates were charged at smaller overpotentials compared to nanometer-sized counterparts formed at low rates.

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