scholarly journals Enhanced Storage Performance of PANI and PANI/Graphene Composites Synthesized in Protic Ionic Liquids

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4275
Author(s):  
Fatima Al-Zohbi ◽  
Fouad Ghamouss ◽  
Bruno Schmaltz ◽  
Mohamed Abarbri ◽  
Mustapha Zaghrioui ◽  
...  
Keyword(s):  
High Performance ◽  
Oxidative Polymerization ◽  
Weight Ratio ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
Storage Performance ◽  
And Storage ◽  
Supercapacitor Applications ◽  
Storage Properties

Polyaniline (PANI) was synthesized using oxidative polymerization in a mixture of water with pyrrolidinium hydrogen sulfate [Pyrr][HSO4], which is a protic ionic liquid PIL. The obtained PANI (PANI/PIL) was compared with conventional PANI (PANI/HCl and PANI/HSO4) in terms of their morphological, structural, and storage properties. The results demonstrate that the addition of this PIL to a polymerization medium leads to a fiber-like morphology, instead of a spherical-like morphology, of PANI/HSO4 or an agglomerated morphology of PANI/HCl. In addition, PAN/PIL exhibits an improvement of the charge transfer kinetic and storage capability in H2SO4 1 mol·L−1, compared to PANI/HCl. The combination of PANI/PIL and graphene oxide (GO), on the other hand, was investigated by optimizing the PANI/GO weight ratio to achieve the nanocomposite material with the best performance. Our results indicate that the PANI/PIL/GO containing 16 wt% of GO material exhibits a high performance and stability (223 F·g−1 at 10 A·g−1 in H2SO4 1 mol·L−1, 4.9 Wh·Kg−1, and 3700 W·Kg−1 @ 10 A·g−1). The obtained results highlight the beneficial role of PIL in building PANI and PANI/GO nanocomposites with excellent performances for supercapacitor applications.

scholarly journals The role of carbon nanotubes in enhanced charge storage performance of VSe2: experimental and theoretical insight from DFT simulations

RSC Advances ◽  
2020 ◽  
Vol 10 (53) ◽  
pp. 31712-31719
Author(s):  
Sree Raj K. A. ◽  
Afsal S. Shajahan ◽  
Brahmananda Chakraborty ◽  
Chandra Sekhar Rout
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Hybrid Structure ◽  
Charge Storage ◽  
Multiwalled Carbon ◽  
Storage Performance ◽  
Dft Simulations ◽  
Supercapacitor Applications ◽  
Theoretical Insight

Hybrid structure of VSe2 and multiwalled carbon nanotube for high performance supercapacitor applications.

Extraordinary energy storage performance and thermal stability in sodium niobate-based ceramics modified by the ion disorder and stabilized antiferroelectric orthorhombic R phase

2021 ◽  
Author(s):  
Ruirui Kang ◽  
Zepeng Wang ◽  
Weijie Yang ◽  
Xiaopei Zhu ◽  
Peng Shi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
High Performance ◽  
Hybrid Electric Vehicles ◽  
Sodium Niobate ◽  
Storage Efficiency ◽  
Storage Performance ◽  
Energy Storage Properties ◽  
Energy Storage Efficiency ◽  
Storage Properties

Developing high-performance dielectric capacitors is essential to meet the growing demands of hybrid electric vehicles and high-power applications. The energy storage efficiency and the temperature-variant energy storage properties should be...

Air

2020 ◽  
pp. 139-177
Author(s):  
John Evans
Keyword(s):  
Carbon Capture ◽  
High Performance ◽  
Internal Combustion Engines ◽  
Atmospheric Oxygen ◽  
Carbon Capture And Storage ◽  
Chemical Properties ◽  
Energy Capture ◽  
Physical And Chemical ◽  
And Storage

The chemical properties of the volatile elements in groups 15 to 18 are outlined, showing how the the periodicicty of the properties of the elements shapes their chemistry. The manufacture of hydrogen and chlorine is described, showing how mercury-free methods have been developed for the latter. The effect of the formation of atmospheric CO2 on atmospheric oxygen content is explained in terms of dissolution in the oceans. Remediation of the exhaust gases from internal combustion engines by catalysts to remove CO2, NOx and carbonaceous particulates is explained. Options for carbon capture and storage by physical and chemical processes are evaluated, and examples provided of these processes in operation. Exploitation of the atmosphere for energy capture using wind turbines has been aided by the development of high performance magnets. The basis of these magnets and the role of rare earth elements is explained.

Role of Cation in Enhancing the Conversion of the Alzheimer’s Peptide into Amyloid Fibrils Using Protic Ionic Liquids

2012 ◽  
Vol 65 (11) ◽  
pp. 1502 ◽  
Author(s):  
Natalie Debeljuh ◽  
Swapna Varghese ◽  
Colin J. Barrow ◽  
Nolene Byrne
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Primary Amine ◽  
Amyloid Fibrils ◽  
Tertiary Amines ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
The Difference ◽  
The Impact

We report on the impact of changes in the protic ionic liquid (pIL) cation on the fibrilisation kinetics and the conversion of the Aβ 16–22 from monomers to amyloid fibrils. When we compare the use of primary, secondary, and tertiary amines we find that the primary amine results in the greatest conversion into amyloid fibrils. We show that the pIL is directly interacting with the peptide and this likely drives the difference in conversion and kinetics observed.

scholarly journals Citric Acid Tunes the Formation of Antimicrobial Melanin-Like Nanostructures

Biomimetics ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 40 ◽  
Author(s):  
Pietro Melone ◽  
Giuseppe Vitiello ◽  
Michela Di Napoli ◽  
Anna Zanfardino ◽  
Maria Federica Caso ◽  
...  
Keyword(s):  
Citric Acid ◽  
High Performance ◽  
Oxidative Polymerization ◽  
Antimicrobial Properties ◽  
Multifunctional Materials ◽  
Paramagnetic Resonance ◽  
Adhesive Ability ◽  
Set Up ◽  
Dopa Melanin

Nature has provided a valuable source of inspiration for developing high performance multifunctional materials. Particularly, catechol-containing amino acid l-3,4-dihydroxyphenylalanine (l-DOPA) has aroused the interest to design hybrid multifunctional materials with superior adhesive ability. DOPA oxidative polymerization mediated by either melanogenic enzymes or an alkaline environment involving catechol intermolecular cross-linking, ultimately leads to melanin oligomers. Recently, relevant studies disclosed the ability of Ti-based nanostructures to tune melanin’s supramolecular structure during its formation, starting from melanogenic precursors, thus improving both antioxidant and antimicrobial properties. In this work, we propose a novel biomimetic approach to design hybrid DOPA melanin-like nanostructures through a hydrothermal synthesis opportunely modified by using citric acid to control hydrolysis and condensation reactions of titanium alkoxide precursors. UV-Vis and Electron paramagnetic resonance (EPR) spectroscopic evidences highlighted the key role of citrate–Ti(IV) and DOPA–Ti(IV) complexes in controlling DOPA polymerization, which specifically occurred during the hydrothermal step, mediating and tuning its conversion to melanin-like oligomers. Trasmission electron microscopy (TEM) images proved the efficacy of the proposed synthesis approach in tuning the formation of nanosized globular nanostructures, with high biocide performances. The obtained findings could provide strategic guidelines to set up biomimetic processes, exploiting the catechol-metal complex to obtain hybrid melanin-like nanosystems with optimized multifunctional behavior.

Design of nickel cobalt molybdate regulated by boronizing for high-performance supercapacitor applications

Nanoscale ◽  
2020 ◽  
Vol 12 (34) ◽  
pp. 17849-17857 ◽  
Author(s):  
Gang Zhao ◽  
Yumeng Chen ◽  
Pengxiao Sun ◽  
Shuhua Hao ◽  
Xiaoke Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Synergistic Effect ◽  
Hierarchical Structure ◽  
Electrode Material ◽  
High Performance ◽  
Hybrid Architectures ◽  
Storage Performance ◽  
Nickel Cobalt ◽  
Cobalt Molybdate ◽  
Supercapacitor Applications

Here, we have successfully synthesized hierarchical structure by boronizing NixCoyMoO4 nanosheets. Benefitting from the synergistic effect among Ni3B, Ni(BO2)2 and NixCoyMoO4 in hybrid architectures, the electrode material possesses higher energy storage performance.

Core–shell ZnO/ZnFe2O4@C mesoporous nanospheres with enhanced lithium storage properties towards high-performance Li-ion batteries

2015 ◽  
Vol 3 (40) ◽  
pp. 20389-20398 ◽  
Author(s):  
Changzhou Yuan ◽  
Hui Cao ◽  
Siqi Zhu ◽  
Hui Hua ◽  
Linrui Hou
Keyword(s):  
High Performance ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Next Generation ◽  
Lithium Storage ◽  
Storage Performance ◽  
Li Ion ◽  
Storage Properties ◽  
Li Storage

Core–shell ZnO/ZnFe2O4@C nanospheres were rationally fabricated and exhibited exceptional electrochemical Li-storage performance for next-generation Li-ion batteries.

scholarly journals Effects of Infusion and Storage on Antioxidant Activity and Total Phenolic Content of Black Tea

2020 ◽  
Vol 10 (8) ◽  
pp. 2685 ◽  
Author(s):  
Min-Yun Chang ◽  
Yin-Yi Lin ◽  
Yu-Chia Chang ◽  
Wen-Ying Huang ◽  
Wen-Shin Lin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
High Performance ◽  
Phenolic Content ◽  
Weight Ratio ◽  
Black Tea ◽  
Storage Conditions ◽  
Total Phenolic ◽  
Dpph Scavenging ◽  
And Storage

This study determined antioxidant activity in terms of the 1,1-Diphenyl-2-picrylhydrazyl (DPPH) scavenging ability and total phenolic content of black tea under different infusion and storage conditions. High performance liquid chromatography analysis identified caffeine, (−)-epigallocatechin, (−)-epicatechin-3-gallate, (−)-epigallocatechin-3-gallate and (−)-gallocatechin-3-gallate in the tea sample. The water–tea leaves weight ratio did not affect the DPPH scavenging ability. However, infusion temperature affected the DPPH scavenging activity and the total phenolic content. In the present study, the 50% inhibitory concentrations (IC50) for DPPH of black tea infused at 60 to 100 °C ranged from 100.0 ± 13.7 to 28.4 ± 4.8 μg/mL. The total phenolic content of black tea steeped at 60 to 100 °C ranged from 50.4 ± 5.2 to 178.6 ± 16.4 mg gallic acid equivalent/g dry leaf. Black tea exhibited increased antioxidant activity when the infusion temperature was increased. Regarding short-term storage, the DPPH scavenging ability and total phenolic content of black tea did not significantly change within 15 days. This result was consistent for storage temperatures of 4, 9, and 25 °C.

Delicate lattice modulation enables superior Na storage performance of Na3V2(PO4)3 as both an anode and cathode material for sodium-ion batteries: understanding the role of calcium substitution for vanadium

2019 ◽  
Vol 7 (16) ◽  
pp. 9807-9814 ◽  
Author(s):  
Lina Zhao ◽  
Hailei Zhao ◽  
Zhihong Du ◽  
Jie Wang ◽  
Xuanyou Long ◽  
...  
Keyword(s):  
Cathode Material ◽  
High Performance ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Storage Performance ◽  
Ca Substitution ◽  
Sodium Storage

High-performance sodium storage in Na3V2(PO4)3 is realized by elaborate lattice modulation by Ca substitution for V.

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