Large-scale Co9S8@C hybrids with tunable carbon thickness for high-rate and long-term performances of an aqueous battery

Nanoscale ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 3741-3747 ◽  
Author(s):  
Cuihua An ◽  
Mengying Wang ◽  
Weiqin Li ◽  
Li Xu ◽  
Yijing Wang
Keyword(s):  
Active Sites ◽  
Large Scale ◽  
Electrode Materials ◽  
High Rate ◽  
Rechargeable Battery ◽  
Aqueous Battery ◽  
Stable Structures

To realize high-rate and long-term performances of an aqueous rechargeable battery, the most effective approach is to build electrode materials with more reaction active sites and stable structures.

scholarly journals Flower-Like Nanostructured ZnCo2O4/RuO2 Electrode Materials for High Performance Asymmetric Supercapacitors

2021 ◽  
Author(s):  
jinjin wang ◽  
Tianfeng Ye ◽  
Yanqun Shao ◽  
zhiyuan lu ◽  
yuting lin ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Electrode Materials ◽  
Rate Capability ◽  
High Rate ◽  
Density Of State ◽  
Asymmetric Supercapacitors ◽  
Redox Active ◽  
First Time

Abstract RuO2 is well known to be an active and expensive metal oxide. In the paper, ZnCo2O4/RuO2 nanocomposites had been synthesized by simple hydrothermal, impregnation and calcination methods. Due to the multifunctional bridge structure, RuO2 could not only effectively inhibit the volume change of ZnCo2O4 in long-term work but also provide more redox active sites. The forbidden bandwidth was reduced and the conductivity was improved after doping RuO2. Comparing with ZnCo2O4, the density of state of ZnCo2O4/RuO2 tended to a higher energy level. ZnCo2O4/3wt% RuO2 electrode exhibited the excellent specific capacitance (1346.56 F g−1), high rate capability and cyclic stability in 6 M KOH aqueous solution. For the first time, the electrochemical performance of ZnCo2O4/RuO2//IrO2-ZnO ASC has been evaluated in two-electrode configurations. The supercapacitor exhibited an excellent energy density of 40.89 W h kg-1 at the power density of 740 W kg-1 and a high capacitance retention of 87.5 % even after 7000 cycles at a scanning rate of 100 mV s-1. The ZnCo2O4/RuO2 was a promising electrode material for supercapacitors.

Hierarchical Ti3C2@TiO2 MXene hybrids with tunable interlayer distance for highly durable lithium-ion batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (18) ◽  
pp. 10369-10379 ◽  
Author(s):  
Li Li ◽  
Gaoxue Jiang ◽  
Cuihua An ◽  
Zhengjun Xie ◽  
Yijing Wang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Hybrid Material ◽  
Active Sites ◽  
Lithium Ion ◽  
Rechargeable Batteries ◽  
High Rate ◽  
Interlayer Distance ◽  
Long Term Performance ◽  
Term Performance

To realize high-rate and long-term performance of rechargeable batteries, the most effective approach is to develop an advanced hybrid material with a stable structure and more reaction active sites.

scholarly journals Electrochemical Investigation of Phenethylammonium Bismuth Iodide as Anode in Aqueous Zn2+ Electrolytes

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 656
Author(s):  
Stylianos Daskalakis ◽  
Mingyue Wang ◽  
Claire J. Carmalt ◽  
Dimitra Vernardou
Keyword(s):  
Large Scale ◽  
Specific Capacity ◽  
Research Work ◽  
Rate Capability ◽  
Chemical Vapor ◽  
High Rate ◽  
New Class ◽  
Bismuth Iodide ◽  
Aqueous Battery ◽  
Safety And Stability

Despite the high potential impact of aqueous battery systems, fundamental characteristics such as cost, safety, and stability make them less feasible for large-scale energy storage systems. One of the main barriers encountered in the commercialization of aqueous batteries is the development of large-scale electrodes with high reversibility, high rate capability, and extended cycle stability at low operational and maintenance costs. To overcome some of these issues, the current research work is focused on a new class of material based on phenethylammonium bismuth iodide on fluorine doped SnO2-precoated glass substrate via aerosol-assisted chemical vapor deposition, a technology that is industrially competitive. The anode materials were electrochemically investigated in Zn2+ aqueous electrolytes as a proof of concept, which presented a specific capacity of 220 mAh g−1 at 0.4 A g−1 with excellent stability after 50 scans and capacity retention of almost 100%.

scholarly journals The Value of Comparative Animal Research: Krogh’s Principle Facilitates Scientific Discoveries

2017 ◽  
Vol 5 (1) ◽  
pp. 118-125 ◽  
Author(s):  
Tyler J. Stevenson ◽  
Beau A. Alward ◽  
Francis J. P. Ebling ◽  
Russell D. Fernald ◽  
Aubrey Kelly ◽  
...  
Keyword(s):  
Large Scale ◽  
Cichlid Fish ◽  
Vocal Learning ◽  
Well Being ◽  
High Rate ◽  
Prairie Voles ◽  
Obesity Epidemic ◽  
Seasonally Breeding ◽  
Molecular Sequencing

Biomedical research is dominated by relatively few nonhuman animals to investigate healthy and disease conditions. Research has overrelied on these models due to their well-described genomes, the capability to control specific genes, and the high rate of reproduction. However, recent advances in large-scale molecular sequencing experiments have revealed, in some cases, the limited similarities in experimental outcomes observed in common rodents (i.e., mice) compared with humans. The value of more varied comparative animal models includes examples such as long-term body weight regulation in seasonally breeding hamsters as a means to help understand the obesity epidemic, vocal learning in songbirds to illuminate language acquisition and maintenance, and reproduction in cichlid fish to discover novel genes conserved in humans. Studying brain genes in prairie voles and cichlids advanced knowledge about social behavior. Taken together, experiments on diverse animal species highlight nontraditional systems for advancing our understanding of human health and well-being.

NOVEL ANODE Li-ION SECONDARY BATTERIES DERIVED FROM NANOCRYSTALLINE Li4Ti5O12/POLYACENE MATERIALS

2009 ◽  
Vol 08 (04n05) ◽  
pp. 333-336
Author(s):  
ABRAHAM F. JALBOUT ◽  
HAI-MING XIE ◽  
RONG-SHUN WANG ◽  
LING-YUN ZHANG ◽  
HAI-YING YU ◽  
...  
Keyword(s):  
Large Scale ◽  
Electrode Materials ◽  
Phenol Formaldehyde ◽  
Lithium Titanate ◽  
High Rate ◽  
Cycle Performance ◽  
Scale Production ◽  
Large Scale Production ◽  
Spinel Lithium Titanate ◽  
Li Ion

Spinel lithium titanate ( Li4Ti5O12 ), shown to be a superior anode material for energy storage battery, has attracted a great deal of attention because of the excellent Li-ion insertion and extraction reversibility. The high rate characteristics must be amplified before large scale production. A method to overcome this is to prepare electrode materials coated with carbon. A Li4Ti5O12 /Polyacene (PAS) composite were first prepared via an in situ carbonization of phenol-formaldehyde (PF) resin route using TiO2 -anatase, Li2CO3 , and PF resin as precursors by a solid-state reaction. With increasing the current density, the sample still keeps the excellent cycle performance.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

A novel ligand with –NH2 and –COOH-decorated Co/Fe-based oxide for an efficient overall water splitting: dual modulation roles of active sites and local electronic structure

2020 ◽  
Vol 10 (18) ◽  
pp. 6266-6273
Author(s):  
Yalan Zhang ◽  
Zebin Yu ◽  
Ronghua Jiang ◽  
Jung Huang ◽  
Yanping Hou ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Water Splitting ◽  
Energy Demand ◽  
Active Sites ◽  
Electrode Materials ◽  
Global Energy ◽  
Overall Water Splitting ◽  
Local Electronic Structure ◽  
Electrochemical Water Splitting

Excellent electrochemical water splitting with remarkable durability can provide a solution to satisfy the increasing global energy demand in which the electrode materials play an important role.

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