Evaluation of aluminium doped lanthanum ferrite based electrodes for supercapacitor design
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
We report Al doped ferrites La1 - xAlxFeO 3(x = 0, 0.3) as an electrode material for supercapacitor design. The La1 - xAlxFeO3 has been synthesized via chemical route. Structural and microstructural evolution has been carried out by X-ray diffraction (XRD) analysis and field emission scanning electron microscopy (FESEM) respectively. The electrode property of La 1 - xAlxFeO3 has been evaluated by using three electrode systems, glassy carbon (working), Pt (counter) and Ag/AgCl (reference electrode) with H2SO4 as the electrolyte. The Al doped ferrites show better cycle life (~ 250) and columbic efficiency (?) (~ 96%) in comparison to un-doped lanthanum ferrite sample. An increase in specific capacitance (~ 1.5 times) has also been observed in Al doped lanthanum ferrite in comparison to lanthanum ferrite. The maximum specific capacitance for Al doped lanthanum ferrite is ~ 260 F/g as compared to lanthanum ferrite ~ 200 F/g. The improved specific capacitance, columbic efficiency and cycle life of Al doped ferrites may be related to a relative decrease in equivalent series resistance (95 ? for LFO to 55 ? LAFO) and lower M.W. of Al doped lanthanum ferrite. ? 2013 Elsevier B.V.
Description
Keywords
Cyclic voltammetry, Electric resistance, Electrochemical electrodes, Electrolytic capacitors, Ferrites, Field emission microscopes, Iron oxides, Cycle, Cycle lives, EIS, Equivalent series resistance, Field emission scanning electron microscopy, Reference electrodes, Super capacitor, Three electrode-system, Aluminum
Citation
Rai, A., Sharma, A. L., & Thakur, A. K. (2014). Evaluation of aluminium doped lanthanum ferrite based electrodes for supercapacitor design. Solid State Ionics, 262, 230-233. doi: 10.1016/j.ssi.2013.10.024