Abstract
Porous α-Fe2O3 nanostructures have been synthesized by sol-gel route. The effect of preparation temperature on the morphology, structure, and electrochemical stability upon cycling has been studied for supercapacitor application. The discharge capacitance of α-Fe2O3 prepared at 300°C is 193 F g -1, when the electrodes are cycled in 0.5 M Na2SO 3 at a specific current of 1 A g-1. The capacitance retention after 1,000 cycles is about 92 % of the initial capacitance at a current density of 2 A g-1. The high discharge capacitance as well as stability of α-Fe2O3 electrodes is attributed to large surface area and porosity of the material. There is a decrease in specific capacitance (SC) on increasing the preparation temperature. As iron oxides are inexpensive, the synthetic route adopted for α-Fe2O3 in the present study is convenient and the SC is high with good cycling stability, the porous α-Fe2O3 is a potential material for supercapacitors.
| Original language | English |
|---|---|
| Pages (from-to) | 1057-1066 |
| Number of pages | 10 |
| Journal | Journal of Solid State Electrochemistry |
| Volume | 18 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2014 |
| Externally published | Yes |
Bibliographical note
Funding Information:S S and T R P acknowledge the financial support from the University Grant Commission (UGC), Government of India, under Dr. D.S. Kothari fellowship program [Ref. No. F.4-2/2006(BSR)/13-626/2012(BSR)] and senior research fellowship, respectively.
Funding
S S and T R P acknowledge the financial support from the University Grant Commission (UGC), Government of India, under Dr. D.S. Kothari fellowship program [Ref. No. F.4-2/2006(BSR)/13-626/2012(BSR)] and senior research fellowship, respectively.
| Funders | Funder number |
|---|---|
| University Grants Commission | F.4-2/2006(BSR)/13-626/2012(BSR) |
Keywords
- Iron oxides
- Porous nanostructures
- Supercapacitors