@article {47030,
	title = {Fabrication of high energy density supercapacitor device based on hollow iridium oxide nanofibers by single nozzle electrospinning},
	journal = {Applied Surface Science},
	volume = {546},
	year = {2021},
	month = {APR },
	pages = {149102},
	type = {Article},
	abstract = {<p>Herein, we have synthesized iridium oxide (IrO2) nanofibers using electrospinning technique and optimization of annealing temperature is undertaken in order to obtain high quality IrO2 nanofibers. The annealing temperature is varied as 200, 300, 400 and 500 degrees C. The synthesized material has hollow nanofibrous morphology with average diameter similar to 45 nm. The formed nanofibers are amorphous in nature. The X-ray Photoelectron Spectroscopy (XPS) result revealed that synthesized iridium is in +4 oxidation state. The electrochemical performance of IrO2 electrodes showed 2 V potential window in three electrode system using 1 M Sodium sulphate (Na2SO4) aqueous electrolyte. The maximum specific capacitance is obtained for sample annealed at 400 degrees C (705F/g at 1 mA/cm(2)) which is due to the well-developed morphology with complete removal of polymer content. Moreover, a novel solid state symmetric IrO2/IrO2 supercapacitor with a high operating voltage of 2 V is built. The symmetric supercapacitor exhibits an energy density of 59 Wh/kg at a power density of 714 W/kg and an excellent cycling stability. These results demonstrate the potentialities of using IrO2 for symmetric supercapacitor for building high energy and power density devices.</p>
},
	keywords = {Aqueous electrolyte, Hollow iridium oxide nanofibers, Symmetric supercapacitor},
	issn = {0169-4332},
	doi = {10.1016/j.apsusc.2021.149102},
	author = {Beknalkar, S. A. and Teli, A. M. and Harale, N. S. and Patil, D. S. and Pawar, S. A. and Shin, J. C. and Patil, P. S.}
}
@article {48988,
	title = {Evaluation of Fe3O4 incorporated functionalized carbon nanotube self-standing buckypaper as electrodes for solid-state symmetric supercapacitor},
	journal = {Journal of Energy Storage },
	volume = {73},
	year = {2023},
	month = {DEC },
	pages = {109-101},
	type = {Article},
	abstract = {<p>
	Iron (II, III) oxide and carbonaceous materials drawn considerable attention in energy storage owing to their special features. In this study, simple reverse co-precipitation, acid functionalization and vacuum filtration methods adopted to synthesis Fe3O4 nanoparticles of size 11 nm and -COOH acid functionalized multi-wall carbon nanotubes (FMWCNT). And further used them to prepare and optimize Fe3O4 in FMWCNT as 15 wt\% and 25 wt\% self-standing buckypapers of around 30-mu m thickness as electrodes for solid-state symmetric capacitor in the form of coin cell. The results show that 15 wt\% and 25 wt\% of Fe3O4-FMWCNT buckypapers hybrid nanostructures have Fe3O4 nanoparticles successfully incorporated in FMWCNT. The 25 wt\% Fe3O4-FMWCNT electrodes with charge transfer resistance of 140 Ohm showed high areal specific capacitance (Cs) 78.5 mF/cm2 and retained 80 \% of its Cs until 800 cycles even at high current density of 1 mA/cm2, scan rate of 100 mV/s whereas 15 wt\% Fe3O4-FMWCNT showed low Cs of 47 mF/cm2 and retained 80 \% of its Cs over 5000 cycles whereas only FMWCNT show Cs is 36 mF/cm2 with 54 Ohm. Finally, a solid-state symmetric supercapacitor coin cell with self-standing 25 wt\% Fe3O4-FMWCNT buckypaper showed an excellent power density of 129.5 mW cm-3 and energy density of 3.6 mWh cm-3 is the innovation of the current work. This is mainly attributed to the combined effect of pseudocapacitive behavior from Fe3O4 by faradaic reaction with additional charge transfer resistance and electric double layer (EDLC) behavior from FMWCNTs by non-faradaic of electronic, ionic transport during charging-discharging. As-made solid-state symmetric supercapacitor appears as a high-performance storage device without extra support of current collectors for practical applications and for fabri-cation of planar capacitors.</p>
},
	keywords = {Buckypaper, Power density, specific capacitance, Symmetric supercapacitor},
	issn = {2352-152X},
	doi = {10.1016/j.est.2023.109101},
	author = {Bhaviripudi, Vijayabhaskara Rao and Dwivedi, Pravin K. and Pabba, Durga Prasad and Aepuru, Radhamanohar and Nakate, Umesh T. and Espinoza-Gonzalez, Rodrigo and Shelke, V, Manjusha}
}
