Electrospun NiO nanofibers as cathode materials for high performance asymmetric supercapacitors

2015 ◽  
Vol 3 (14) ◽  
pp. 7513-7522 ◽  
Author(s):  
Muhamed Shareef Kolathodi ◽  
Milan Palei ◽  
Tirupattur Srinivasan Natarajan
Keyword(s):  
Electrochemical Properties ◽  
Cathode Materials ◽  
High Performance ◽  
Asymmetric Supercapacitors

Highly granulated NiO nanofibers were prepared by electrospinning and their electrochemical properties as cathode materials were investigated for asymmetrical supercapacitors.

Hierarchical NiCo2O4 nanosheets@hollow microrod arrays for high-performance asymmetric supercapacitors

2014 ◽  
Vol 2 (13) ◽  
pp. 4706-4713 ◽  
Author(s):  
Xue-Feng Lu ◽  
Dong-Jun Wu ◽  
Run-Zhi Li ◽  
Qi Li ◽  
Sheng-Hua Ye ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Thermal Annealing ◽  
High Performance ◽  
Cycle Stability ◽  
Asymmetric Supercapacitors ◽  
Environmental Friendly ◽  
Nico2o4 Nanosheets

Novel NiCo2O4 NSs@HNRAs are fabricated via a simple and environmental friendly template-assisted electrodeposition followed by thermal annealing and they exhibit predominant electrochemical properties and long-term cycle stability.

Engineering Rhynchostylis retusa-like heterostructured α-nickel molybdate with enhanced redox properties for high-performance rechargeable asymmetric supercapacitors

2019 ◽  
Vol 7 (47) ◽  
pp. 26893-26904 ◽  
Author(s):  
Ganji Seeta Rama Raju ◽  
Eluri Pavitra ◽  
Goli Nagaraju ◽  
Nilesh R. Chodankar ◽  
Sujaya Kumar Vishwanath ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
High Performance ◽  
Cost Effective ◽  
Single Step ◽  
Redox Properties ◽  
Asymmetric Supercapacitors ◽  
Wet Chemistry ◽  
Nickel Molybdate ◽  
Superior Electrochemical Properties

Rhynchostylis retusa-like α-NiMoO4 was synthesized using a simple, single-step, and cost-effective wet-chemistry approach, and it exhibited the superior electrochemical properties.

Facile synthesis of manganese carbonate quantum dots/Ni(HCO3)2–MnCO3 composites as advanced cathode materials for high energy density asymmetric supercapacitors

2015 ◽  
Vol 3 (44) ◽  
pp. 22102-22117 ◽  
Author(s):  
Qi Xun Xia ◽  
Kwan San Hui ◽  
Kwun Nam Hui ◽  
Sung Dae Kim ◽  
Jae Hong Lim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Density ◽  
Cathode Materials ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Manganese Carbonate ◽  
Facile Synthesis ◽  
Asymmetric Supercapacitors ◽  
Cathode Electrode

Well dispersed MnCO3 quantum dots (∼1.2 nm) decorated on Ni(HCO3)2–MnCO3 as a cathode electrode for high performance supercapacitors.

Hierarchical multi-shelled nanoporous mixed copper cobalt phosphide hollow microspheres as a novel advanced electrode for high-performance asymmetric supercapacitors

2017 ◽  
Vol 5 (35) ◽  
pp. 18429-18433 ◽  
Author(s):  
Seyyed Ebrahim Moosavifard ◽  
Saeid Kamari Kaverlavani ◽  
Javad Shamsi ◽  
Ali Bakouei
Keyword(s):  
Electrochemical Properties ◽  
High Performance ◽  
Hollow Microspheres ◽  
Asymmetric Supercapacitors ◽  
Cobalt Phosphide ◽  
First Time ◽  
Superior Electrochemical Properties

Hierarchical multi-shelled nanoporous mixed copper cobalt phosphide microspheres have been for the first time developed as a novel advanced electrode with superior electrochemical properties.

scholarly journals A Comparative Study on Na2Fe0.6Mn0.4PO4F/C Cathode Materials Synthesized With Various Carbon Sources for Na-ion Batteries

2021 ◽  
Vol 8 ◽  
Author(s):  
Shibao Tang ◽  
Xiaoping Zhang ◽  
Yulei Sui ◽  
Bingjue Wang ◽  
Jiangpeng Li ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Composite Materials ◽  
Electrochemical Properties ◽  
Cathode Materials ◽  
High Performance ◽  
Carbon Sources ◽  
Electrochemical Analysis ◽  
High Discharge ◽  
Structure Morphology ◽  
Discharge Capacities

Na2Fe0.6Mn0.4PO4F/C composite materials are synthesized with various carbon sources via a simple spray-drying method in this study, and the effect of carbon sources on structure, morphology, and electrochemical properties of Na2Fe0.6Mn0.4PO4F/C materials are investigated in detail. XRD and SEM results indicate that the reduction ability of carbon sources has a key impact on the structure and morphology of Na2Fe0.6Mn0.4PO4F/C composite materials. Among these Na2Fe0.6Mn0.4PO4F/C materials, the sample prepared with ascorbic acid presents a uniform hollow spherical architecture. Electrochemical analysis demonstrates that the Na2Fe0.6Mn0.4PO4F/C sample prepared with ascorbic acid has optimal electrochemical performance. The sample shows high discharge capacities of 95.1 and 48.1 mAh g−1 at 0.05C and 1C rates, respectively, and it exhibits an improved cycle stability (91.7% retention after 100 cycles at 0.5C), which are superior to Na2Fe0.6Mn0.4PO4F/C materials prepared with other carbon sources. This study demonstrates that the reduction ability of carbon sources significantly influences the electrochemical properties of fluorophosphate/C composite materials. This work also provides a promising strategy to obtain high performance cathode materials for sodium-ion batteries.

Electrochemical Properties of Pristine and Vanadium Doped LiFePO4 Nanocrystallized Glasses

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8042
Author(s):  
Justyna E. Frąckiewicz ◽  
Tomasz K. Pietrzak ◽  
Maciej Boczar ◽  
Dominika A. Buchberger ◽  
Marek Wasiucionek ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Cathode Materials ◽  
Nanocrystalline Materials ◽  
High Performance ◽  
Glassy Matrix ◽  
Capacity Fade ◽  
X Ray ◽  
Relative Capacity

In our recent papers, it was shown that the thermal nanocrystallization of glassy analogs of selected cathode materials led to a substantial increase in electrical conductivity. The advantage of this technique is the lack of carbon additive during synthesis. In this paper, the electrochemical performance of nanocrystalline LiFePO4 (LFP) and LiFe0.88V0.08PO4 (LFVP) cathode materials was studied and compared with commercially purchased high-performance LiFePO4 (C-LFP). The structure of the nanocrystalline materials was confirmed using X-ray diffractometry. The laboratory cells were tested at a wide variety of loads ranging from 0.1 to 3 C-rate. Their performance is discussed with reference to their microstructure and electrical conductivity. LFP exhibited a modest electrochemical performance, while the gravimetric capacity of LFVP reached ca. 100 mAh/g. This value is lower than the theoretical capacity, probably due to the residual glassy matrix in which the nanocrystallites are embedded, and thus does not play a significant role in the electrochemistry of the material. The relative capacity fade at high loads was, however, comparable to that of the commercially purchased high-performance LFP. Further optimization of the crystallites-to-matrix ratio could possibly result in further improvement of the electrochemical performance of nanocrystallized LFVP glasses.

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