TY - JOUR
T1 - Improved energy storage, magnetic and electrical properties of aligned, mesoporous and high aspect ratio nanofibers of spinel-NiMn 2 O 4
AU - Bhagwan, Jai
AU - Rani, Stuti
AU - Sivasankaran, V.
AU - Yadav, K. L.
AU - Sharma, Yogesh
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/12/31
Y1 - 2017/12/31
N2 - Spinel-NiMn 2 O 4 (NMO) nanofibers of high aspect ratio, high surface area (50 m 2 g −1 ) and homogeneous pore size distribution are fabricated by electrospinning process and characterized by XRD, FTIR, XPS, BET, FESEM, TEM techniques. Further, multifunctional properties (energy storage properties, magnetic and electrical properties) of NMO nanofibers are also examined. High specific capacitance (C s ) of 410 (±5) F g −1 at 1 A g −1 , good rate capability and high cycling stability (up to 5000 cycles) are demonstrated by NMO nanofibers. Furthermore, NMO-based solid-state symmetric supercapacitor (SSSC) shows a high C s of 170 (±5) F g −1 at 0.5 A g −1 in potential range of 0.0V–2.0 V and exhibits excellent energy density of ∼95 W h kg −1 and power density of 1030 W Kg −1 . The above storage properties i.e. high energy density and output voltage of 2.0 V are further supplemented by lighting up a red colored LED (1.8 V @ current 20 mA) at least for 5 min. The ionic diffusion coefficient of NMO based electrode is found to be ∼4.84 × 10 −11 cm 2 s −1 . Magnetic and dielectric properties of NMO nanofibers are also examined and results are discussed.
AB - Spinel-NiMn 2 O 4 (NMO) nanofibers of high aspect ratio, high surface area (50 m 2 g −1 ) and homogeneous pore size distribution are fabricated by electrospinning process and characterized by XRD, FTIR, XPS, BET, FESEM, TEM techniques. Further, multifunctional properties (energy storage properties, magnetic and electrical properties) of NMO nanofibers are also examined. High specific capacitance (C s ) of 410 (±5) F g −1 at 1 A g −1 , good rate capability and high cycling stability (up to 5000 cycles) are demonstrated by NMO nanofibers. Furthermore, NMO-based solid-state symmetric supercapacitor (SSSC) shows a high C s of 170 (±5) F g −1 at 0.5 A g −1 in potential range of 0.0V–2.0 V and exhibits excellent energy density of ∼95 W h kg −1 and power density of 1030 W Kg −1 . The above storage properties i.e. high energy density and output voltage of 2.0 V are further supplemented by lighting up a red colored LED (1.8 V @ current 20 mA) at least for 5 min. The ionic diffusion coefficient of NMO based electrode is found to be ∼4.84 × 10 −11 cm 2 s −1 . Magnetic and dielectric properties of NMO nanofibers are also examined and results are discussed.
KW - Electrical and magnetic properties
KW - Electrospinning
KW - NiMn O
KW - Supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85026772898&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2017.07.253
DO - 10.1016/j.apsusc.2017.07.253
M3 - Article
AN - SCOPUS:85026772898
SN - 0169-4332
VL - 426
SP - 913
EP - 923
JO - Applied Surface Science
JF - Applied Surface Science
ER -