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Title: Effect of doping on the performance of high-crystalline SrMnO3 perovskite nanofibers as a supercapacitor electrode

Journal Article · · Ceramics International
 [1];  [1];  [1];  [2];  [3];  [3];  [3];  [1]
  1. Fayetteville State Univ., Fayetteville, NC (United States)
  2. Kunming Univ. of Science and Technology, Kunming (People's Republic of China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)

Perovskite oxides are promising multi-functional materials with enhanced physical and chemical properties. In this study, high-crystalline SrMnO3 perovskite oxide nanofibers have been successfully synthesized by sol–gel electrospinning followed by calcination at different temperatures, using polyvinylpyrrolidone as a sacrificial polymeric binder. The change in porosity and grain size with calcination temperature imparted a substantial effect on the electrochemical properties of the obtained SrMnO3 nanofibers. The SrMnO3 nanofiber electrode calcined at 700 °C exhibits an electrochemical capacitance of 321.7 F g–1 at a discharge current density of 0.5 A g–1. Here, the effect of doping Ba/Ca on Sr, and Co/Fe/Ni on Mn, respectively, on the specific capacitance of SrMnO3 nanofibers is studied. 20 mol% Ba loading shows the best performance as a supercapacitor electrode with a specific capacitance of 446.8 F g–1 at a discharge current density of 0.5 A g–1. The nanofibers retained 87% its initial capacitance after 5000 successive cycles. The device fabricated using the nanofibers show an energy density of 37.3 W h kg–1 at a power density of 400 W kg–1, and it is retained as 15.7 W h kg–1 even at a high-power density of 8006 W kg–1, indicating the potential of this electrode material for high-rate charge/discharge operations in supercapacitors.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); U.S. Department of Defense (DOD); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1572464
Alternate ID(s):
OSTI ID: 1693768
Journal Information:
Ceramics International, Vol. 44, Issue 17; ISSN 0272-8842
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 75 works
Citation information provided by
Web of Science

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