scholarly journals Properties and Medical Applications of Biocompatible Polyamide in Additive Manufacturing

2021 ◽  
Vol 58 (1) ◽  
pp. 113-120
Author(s):  
Dan Ioan Stoia ◽  
Cosmina Vigaru ◽  
Carmen Opris ◽  
Marius Vasilescu
Keyword(s):  
Energy Density ◽  
Structural Characteristics ◽  
Selective Laser Sintering ◽  
High Energy ◽  
Low Energy ◽  
High Energy Density ◽  
Medical Applications ◽  
Rectangular Shape ◽  
Custom Made ◽  
Intermediate Value

The paper presents the structural and dimensional differences of rectangular shape samples manufactured by selective laser sintering (SLS) according to three process sinterization energies. In this study we determine the geometrical and structural characteristics of biocompatible PA2200 polyamide manufactured at a low energy density E1, and intermediate value E2 and a high energy density E3. Relaying on these results, four custom-made medical parts have been built using biocompatible polyamide PA2200 powder, in order to evaluate their performances.

Transportation: Fuel Energies

2017 ◽  
Author(s):  
Peter Rez
Keyword(s):  
Energy Density ◽  
Fossil Fuels ◽  
High Energy ◽  
Ease Of Use ◽  
Low Energy ◽  
High Energy Density ◽  
Nuclear Fuels ◽  
Liquid Hydrocarbons ◽  
Transportation Fuel ◽  
Journey Time

Transportation efficiency can be measured in terms of the energy needed to move a person or a tonne of freight over a given distance. For passengers, journey time is important, so an equally useful measure is the product of the energy used and the time taken for the journey. Transportation requires storage of energy. Rechargeable systems such as batteries have very low energy densities as compared to fossil fuels. The highest energy densities come from nuclear fuels, although, because of shielding requirements, these are not practical for most forms of transportation. Liquid hydrocarbons represent a nice compromise between high energy density and ease of use.

Core–Shell Structured NiCo2O4@ZnCo2O4 Nanomaterials with High Energy Density for Hybrid Capacitors

2021 ◽  
Vol 16 (7) ◽  
pp. 1134-1142
Author(s):  
Wenduo Yang ◽  
Jun Xiang ◽  
Sroeurb Loy ◽  
Nan Bu ◽  
Duo Cui ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrode Material ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Structural Characteristics ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
Shell Composite ◽  
Hybrid Capacitors

NiCo2O4 as an electrode material for supercapacitors (SCs) has been studied by a host of researchers due to its unique structural characteristics and high capacitance. However, its performance has not yet reached the level of practical applications.it is an effective strategy to synthesize composite electrode materials for tackling the problem. Herein, NiCo2O4@ZnCo2O4 as a novel core–shell composite electrode material has been fabricated through a two-step simple hydrothermal method. The as-prepared sample can be directly used as cathode material of a supercapacitor, and its specific capacitance is 463.1 C/g at 1 A/g. An assembled capacitor has an energy density of 77 Wh·kg−1 at 2700 W·kg−1, and after 8000 cycles, 88% of the initial capacity remains.

scholarly journals Ultra-high energy density supercapacitors using a nickel phosphide/nickel/titanium carbide nanocomposite capacitor electrode

Nanoscale ◽  
2020 ◽  
Vol 12 (25) ◽  
pp. 13618-13625
Author(s):  
Jing Xu ◽  
Nianjun Yang ◽  
Siyu Yu ◽  
Anna Schulte ◽  
Holger Schönherr ◽  
...  
Keyword(s):  
Energy Density ◽  
Titanium Carbide ◽  
High Energy ◽  
Nickel Titanium ◽  
Low Energy ◽  
High Energy Density ◽  
Nickel Phosphide ◽  
Ultra High Energy

The low energy density of traditional supercapacitors has strongly restricted their applications.

Electrochemically Reduced Ultra-high Mass Loading Three-Dimensional Carbon Nanofiber Network: A Reproducible and Stable Cell Voltage of 2.0 V and High Energy Density Symmetric Supercapacitor

Nanoscale ◽  
2021 ◽  
Author(s):  
Gunendra Prasad Ojha ◽  
Bishweshwar Pant ◽  
Jiwan Acharya ◽  
Mira Park
Keyword(s):  
Energy Density ◽  
Carbon Nanofiber ◽  
Three Dimensional ◽  
Cell Voltage ◽  
High Energy ◽  
Low Energy ◽  
High Energy Density ◽  
High Mass ◽  
Mass Loading ◽  
Symmetric Supercapacitor

Commercial supercapacitors need high mass loading of more than 10 mg cm-2 and a high working potential window to resolve the low energy density concern. Herein, we have demonstrated a...

scholarly journals Low Energy Neutron Measurements in High Energy Density Plasmas using the National Ignition Facility

2014 ◽  
Vol 9 (0) ◽  
pp. 4404101-4404101 ◽  
Author(s):  
Lee A. BERNSTEIN ◽  
Darren L. BLEUEL ◽  
Joseph A. CAGGIANO ◽  
Charles CERJAN ◽  
Richard J. FORTNER ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Low Energy ◽  
High Energy Density ◽  
National Ignition Facility ◽  
Energy Neutron ◽  
High Energy Density Plasmas

scholarly journals Improved Energy Storage Performance of Linear Dielectric Polymer Nanodielectrics with Polydopamine coated BN Nanosheets

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1349 ◽  
Author(s):  
Jian Wang ◽  
Yunchuan Xie ◽  
Jingjing Liu ◽  
Zhicheng Zhang ◽  
Qiang Zhuang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Surface Coating ◽  
Breakdown Strength ◽  
High Energy ◽  
Low Energy ◽  
High Energy Density ◽  
Storage Performance ◽  
2D Structure ◽  
Dielectric Polymer

Polymer-based nanodielectrics have been intensively investigated for their potential application as energy storage capacitors. However, their relatively low energy density (Ue) and discharging efficiency (η) may greatly limit their practical usage. In present work, high insulating two-dimensional boron nitride nanosheets (BNNS), were introduced into a linear dielectric polymer (P(VDF-TrFE-CTFE)-g-PMMA) matrix to enhance the energy storage performance of the composite. Thanks to the surface coating of polydopamine (PDA) on BN nanosheets, the composite filled with 6 wt% coated BNNS (mBNNS) exhibits significantly improved breakdown strength (Eb) of 540 MV/m and an energy density (Ue) of 11 J/cm3, which are increased by 23% and 100%, respectively as compared with the composite filled with the same content of pristine BNNS. Meanwhile, η of both composites is well retained at around 70% even under a high voltage of 400 MV/m, which is superior to most of the reported composites. This work suggests that complexing polymer matrix with linear dielectric properties with surface coated BNNS fillers with high insulating 2D structure might be a facile strategy to achieve composite dielectrics with simultaneously high energy density and high discharging efficiency.

scholarly journals Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Guifeng Wang ◽  
Feng Jin ◽  
Siyuan Gong ◽  
Linming Dou ◽  
Chaojun Fan ◽  
...  
Keyword(s):  
Energy Density ◽  
Dynamic Loading ◽  
High Energy ◽  
Low Energy ◽  
High Energy Density ◽  
Good Resistance ◽  
Dynamic Disturbance ◽  
Shock Resistance ◽  
Strong Tremors ◽  
Velocity Region

Numerous tremors occur during excavation and mining periods in coal mines, and low-energy tremors often occur before strong tremors. In addition, it is found that not all strong tremors cause rockbursts. Therefore, generating behaviors of strong tremors and the triggering criterion for the occurrence of the rockburst must be investigated. In this study, generating behaviors of strong tremors were inferred by velocity tomograms and energy density clouds. An innovative facility capable of applying dynamic disturbance to roadway models was developed to study the triggering criterion for rockbursts. Velocity tomograms indicated that the stress concentration extended to the syncline region with the advance of the coalface. High-energy-density clouds expanded rapidly and regularly in some areas that were parts of the high-velocity region, indicating that the stress increased rapidly in these areas, until strong tremors took place nearby. AE activities suggested that the modelled roadway offered good resistance as the dynamic loading energy grew from 29.4 J to 117.6 J. Then, sharp AE activity at the dynamic loading energy of 147 J indicated the ultimate shock resistance of the roadway was almost reached. Finally, bursting failure of the modelled roadway was observed at a dynamic loading energy of 176.4 J.

scholarly journals Laser photonic-reduction stamping for graphene-based micro-supercapacitors ultrafast fabrication

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yongjiu Yuan ◽  
Lan Jiang ◽  
Xin Li ◽  
Pei Zuo ◽  
Chenyang Xu ◽  
...  
Keyword(s):  
Energy Density ◽  
Three Dimensional ◽  
Single Pulse ◽  
Laser Pulses ◽  
High Energy ◽  
Small Time ◽  
Low Energy ◽  
High Energy Density ◽  
Dimensional Structure ◽  
Energy Storage Devices

AbstractMicro-supercapacitors are promising miniaturized energy storage devices that have attracted considerable research interest. However, their widespread use is limited by inefficient microfabrication technologies and their low energy density. Here, a flexible, designable micro-supercapacitor can be fabricated by a single pulse laser photonic-reduction stamping. A thousand spatially shaped laser pulses can be generated in one second, and over 30,000 micro-supercapacitors are produced within 10 minutes. The micro-supercapacitor and narrow gaps were dozens of microns and 500 nm, respectively. With the unique three-dimensional structure of laser-induced graphene based electrode, a single micro-supercapacitor exhibits an ultra-high energy density (0.23 Wh cm−3), an ultra-small time constant (0.01 ms), outstanding specific capacitance (128 mF cm−2 and 426.7 F cm−3) and a long-term cyclability. The unique technique is desirable for a broad range of applications, which surmounts current limitations of high-throughput fabrication and low energy density of micro-supercapacitors.

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