Effect of doping on the performance of high-crystalline SrMnO3 perovskite nanofibers as a supercapacitor electrode
Journal Article
·
· Ceramics International
- Fayetteville State Univ., Fayetteville, NC (United States)
- Kunming Univ. of Science and Technology, Kunming (People's Republic of China)
- 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 Lab. (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) (SC-22)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1572464
- Alternate ID(s):
- OSTI ID: 1693768
- Journal Information:
- Ceramics International, Journal Name: Ceramics International Journal Issue: 17 Vol. 44; ISSN 0272-8842
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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