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From Sodium–Oxygen to Sodium–Air Battery: Enabled by Sodium Peroxide Dihydrate

Journal Article · · Nano Letters
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4];  [5];  [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Illinois at Chicago, IL (United States)
  3. Univ. of Hawaii at Manoa, Honolulu, HI (United States)
  4. Univ. of Illinois at Chicago, IL (United States)
  5. Argonne National Lab. (ANL), Lemont, IL (United States); Stanford Univ., CA (United States)
Metal-air batteries have attracted extensive research interests due to their high theoretical energy density. However, most of the previous studies were limited by applying pure oxygen in the cathode, sacrificing the gravimetric and volumetric energy density. Here, we develop a real sodium-"air" battery, in which the rechargeability of the battery relies on the reversible reaction of the formation of sodium peroxide dihydrate (Na2O2 ∙ 2H2O). After an oxygen evolution reaction catalyst is applied, the charge overpotential is largely reduced to achieve a high energy efficiency. The sodium-air batteries deliver high areal capacity of 4.2 mAh.cm-2 and have a decent cycle life of 100 cycles. The oxygen crossover effect is largely suppressed by replacing the oxygen with air, whereas the dense solid electrolyte interphase formed on the sodium anode further prolongs the cycle life.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Vehicle Technologies (VTO); USDOE Office of Science (SC), Office of Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1660385
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 6 Vol. 20; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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