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article

Third-order local nonlinear microwave response of YBa/sub 2/Cu/sub 3/O/sub 7/ and Nb thin films

Pestov, E.E., Nozdrin, Y.N., Kurin, V.V.

IEEE Transactions on Applied Superconductivity > 2001 > 11 > 1-1 > 131 - 134

HTS thin films continue to be of interest for passive device applications at microwave frequencies, but nonlinear effects may limit their performance. We report a set of experimental data on local third-harmonic generation at microwave frequencies (0.5 GHz) in YBa/sub 2/Cu/sub 3/O/sub 7/ and Nb thin films from 4.2 K to T/sub c/. For local investigations of the nonlinear response a probe with inductive...

article

A redox‐additive electrolyte for cobalt‐manganese‐layered double hydroxides‐based asymmetric supercapacitor

Subbiah Vijaya, Piyush Sharma, Belqasem Aljafari, Sambandam Anandan

International Journal of Energy Research > 46 > 15 > 23871 - 23878

A cobalt‐manganese‐layered double hydroxide (CoMn‐LDH), the extremely desired electrode material in supercapacitors, has been synthesized via a one‐step hydrothermal technique. The XRD analysis confirmed the formation of the CoMn‐LDH. The nanorod‐shaped surface morphology is revealed from the scanning electron microscopy and transmission electron microscopy analysis. The asymmetric supercapacitor...

article

Hardness, corrosion behavior, and microstructure of Al-Cu-Mg alloy as a function of 0.3 wt.% Zr addition

Karrar Saad, Jassim M. Salman Al-Murshdy

Diagnostyka > 2023 > Vol. 24, No. 1 > art. no. 223104

The effect of adding zirconium (Zr) as an alloying element to Al-Cu-Mg alloy on the hardness and corrosion of this alloy was investigated. The hardness and polarization test results of samples treated for various periods by aging at 423.15 K for 3hr showed a significant increment in the Brinell hardness (HBW) improvement ratio of 115.6% (from 45HBW to 97HBW) and an extreme reduction the corrosion...

article

Van der Waals Epitaxial Trilayer MoS₂ Crystals for High‐Speed Electronics

Xuefei Li, Zhenfeng Zhang, Tingting Gao, Xinhang Shi, more

Advanced Functional Materials > 32 > 46 > n/a - n/a

Two‐dimensional MoS₂ field‐effect transistors (FETs) have great potential for next‐generation electronics due to their excellent electronic properties with an atomic thin channel. However, multiple challenges exist for the monolayer MoS₂ channel, including interface scattering and ohmic contact. In this work, well‐controlled trilayer MoS₂ with high mobility and large single crystals is successfully...

article

Analysis and experimental investigation on passive direct methanol fuel cell current collectors with taper cylindrical openings

N. V. Raghavaiah, G. Naga Srinivasulu

Fuel Cells > 22 > 5 > 169 - 185

Analysis of buoyancy effect on the evaluation of carbon dioxide gas from passive direct methanol fuel cell current collectors’ (CCs’) openings is carried out. Two types of setups are chosen for the analysis, one with taper cylindrical openings and the other with uniform cylindrical openings. The analysis shows that buoyancy is more effective in taper cylindrical openings due to the accommodation of...

article

Unprecedented Multifunctionality in 1D Nb_1‐_xTa_xS₃ Transition Metal Trichalcogenide Alloy

Zahra Hemmat, Alireza Ahmadiparidari, Shuxi Wang, Khagesh Kumar, more

Advanced Functional Materials > 32 > 34 > n/a - n/a

1D materials, such as nanofibers or nanoribbons are considered as the future ultimate limit of downscaling for modern electrical and electrochemical devices. Here, for the first time, nanofibers of a solid solution transition metal trichalcogenide (TMTC), Nb_1‐_xTa_xS₃, are successfully synthesized with outstanding electrical, thermal, and electrochemical characteristics rivaling the performance of the‐state‐of‐the...

article

Investigation of Electrical Parameters of CdTe Photovoltaic Devices by Computational Analysis

Nitesh Kumar Singh, Anshul Agarwal, Tirupathiraju Kanumuri

physica status solidi (a) > 219 > 3 > n/a - n/a

This article discusses the numerical analysis of heterojunction photovoltaic cells based on cadmium telluride (CdTe) using the SCAPS‐1D software. A novel glass/FTO/SnO₂/CdS/interdiffusion/CdTe/SnS₂/Se photovoltaic cell design is proposed for investigation. Additionally, the effect of thickness variation in the p‐type CdTe film, thickness variation in the interdiffusion layer, defect density in the...

article

The Performance of Electrocoagulation Process in Removing Organic and Nitrogenous Compounds from Landfill Leachate in a Three-Compartment Reactor

Arseto Yekti Bagastyo, Fahrudin Sidik, Anita Dwi Anggrainy, Jr-Lin Lin, more

Journal of Ecological Engineering > 2022 > Vol. 23, nr 2 > 235--245

In this study, the effectiveness of the electrocoagulation (EC) process was evaluated based on the reduction of organic and nitrogenous contaminants in landfill leachate. A three-compartment electrochemical reactor as pre-treatment of stabilized landfill leachate was carried out ahead of biological treatment. The removal efficiencies of COD, BOD, ammonia, and nitrate were analyzed at pH 4, 6, and...

article

A Study of Magnetic Reconnection

B. P. Akalanka, K. A. I. L. Wijewardena Gamalath

World Scientific News > 2022 > 165 > 33-65

A two dimensional model under uniform resistivity was studied for incompressible plasma. The dynamical equations governing the time evolution of the system was derived using basic theory in electrodynamics and fluid mechanics. A computer code to simulate the reconnection was developed with an explicit finite difference method as the discretization scheme. The boundary condition for the plasma inflow...

article

Effect of the Applied Current Density and Deposition Time on Electro-Codeposition Process of Cobalt Matrix Reinforced with Nano-CeO₂

Nicoleta Simionescu-Bogatu, Lidia Benea

Archives of Metallurgy and Materials > 2022 > Vol. 67, iss. 2 > 615--622

This research paper aims to study the influence of some of the main parameters applied to the electrodeposition process on the nanocomposite layers obtained by strengthening the cobalt matrix with cerium oxide nanoparticles. Thus, the current efficiency (process efficiency) and the degree of inclusion of cerium oxide nanoparticles into cobalt matrix are analyzed according to the current density, the...

article

Combination of absorptive notch filter and tunable dual‐band conventional notch filter

Mohammad Sajjad Bayati, Seyed Mohammad Hadi Mousavi, Seyed Vahab Al‐Din Makki

Microwave and Optical Technology Letters > 64 > 1 > 30 - 35

In this paper, a new kind of absorptive bandstop filter composing three series‐coupled lines is designed, investigated, and fabricated. The proposed circuit is indeed a combination of a dual‐band conventional notch filter and a single‐band absorptive filter generating two conventional and an absorptive notch. More precisely, the circuit introduces a fixed absorptive notch at 4.22 GHz and two electronically...

article

New design of low profile Uniform Substrate integrated waveguide antenna with square patch loaded

Mowafak K. Mohsen, Ayad Hameed Mousa, Rawya Read Jowad

Przegląd Elektrotechniczny > 2021 > R. 97, nr 11 > 30--34

In this paper, a new design low profile periodic microstrip substrate integrated waveguide antenna with patch loaded for scanning radiation pattern for the main beam. The radiation pattern can be changing the elevation angle (beam direction) by using the square microstrip patch loaded on the edge of microstrip line, and that’s due to changing the reactive impedance of antenna. This square patches...

article

Numerical simulation of solid oxide fuel cells comparing different electrochemical kinetics

Xiaoqiang Zhang, Lei Wang, Mayken Espinoza, Tingshuai Li, more

International Journal of Energy Research > 45 > 9 > 12980 - 12995

Solid oxide fuel cells (SOFCs) produce electricity with high electrical efficiency and fuel flexibility without pollution, for example, CO₂, NO_x, SO_x, and particles. Still, numerous issues hindered the large‐scale commercialization of fuel cell at a large scale, such as fuel storage, mechanical failure, catalytic degradation, electrode poisoning from fuel and air, for example, lifetime in relation...

article

Computer modeling of electrochemical processing of waste nuclear fuel

Alexander Y. Galashev, Alexander I. Manzhurov, Yuri P. Zaikov

International Journal of Energy Research > 45 > 8 > 11664 - 11676

The purpose of the work is to study the influence of the electrodes geometry and the mutual arrangement of functional elements in the working space of a metallization electrolyzer on the distribution of the oxygen flux density in the electrolyte, as well as on the distribution of electric and temperature fields. In a computer model, the stationary operation mode of the electrolyzer for processing...

article

Design strategy of electrode patterns based on finite element analysis in microfluidic device for Trans‐Epithelial Electrical Resistance (TEER) measurement

Takashi Miyazaki, Yoshikazu Hirai, Ken‐ichiro Kamei, Toshiyuki Tsuchiya, more

Electronics and Communications in Japan > 104 > 2 > n/a - n/a

Trans‐epithelial electrical resistance (TEER) is a widely used non‐invasive and label‐free measurement to evaluate the barrier function of mono‐layered cells in real‐time. However, TEER values depend on distribution of electric current densities generated by a combination of shapes and arrangements of plane electrodes for performing TEER, but until now, there is no systematical analysis of their effects...

article

Boosting Production of HCOOH from CO₂ Electroreduction via Bi/CeO_x

Yan‐Xin Duan, Yi‐Tong Zhou, Zhen Yu, Dong‐Xue Liu, more

Angewandte Chemie > 133 > 16 > 8880 - 8884

Formic acid (HCOOH) is one of the most promising chemical fuels that can be produced through CO₂ electroreduction. However, most of the catalysts for CO₂ electroreduction to HCOOH in aqueous solution often suffer from low current density and limited production rate. Herein, we provide a bismuth/cerium oxide (Bi/CeO_x) catalyst, which exhibits not only high current density (149 mA cm⁻²), but also unprecedented...

article

Boosting Production of HCOOH from CO₂ Electroreduction via Bi/CeO_x

Yan‐Xin Duan, Yi‐Tong Zhou, Zhen Yu, Dong‐Xue Liu, more

Angewandte Chemie International Edition > 60 > 16 > 8798 - 8802

article

Combination effects of flow field structure and assembly force on performance of high temperature proton exchange membrane fuel cells

Tianyu Zhang, Jie Li, Qiang Li, Mingfu Yu, more

International Journal of Energy Research > 45 > 5 > 7903 - 7917

In this work, a three‐dimensional, steady state model was developed by combining mechanical equations, Navier‐stokes equation, Maxwell‐Stefan equation, and Butler‐Volmer equation. This model was used to investigate the influences of flow field structure and assembly force on porosity distribution in gas diffusion layer (GDL), species distribution in GDL, and current density distribution in GDL and...

article

Numerical analysis of wave‐shaped flow field plate for proton‐exchange membrane fuel cell

Hao Hu, Xiaoming Xu, Nan Mei, Chen Li

International Journal of Energy Research > 45 > 5 > 6689 - 6697

The change of the geometry of the flow field plate will affect the distribution of reaction gas and further change the reaction rate inside the cell. This article uses computational fluid dynamics as a research method to observe the improvement of fuel cell performance of different channel geometries. In the single‐channel simulation, channel of different shapes has very limited influence on current...

article

Bioremediation analysis of sediment‐microbial fuel cells for energy recovery from microbial activity in soil

Debajyoti Bose, Mahula Santra, Rama Venkata Siva Prasanna Sanka, Balaji Krishnakumar

International Journal of Energy Research > 45 > 4 > 6436 - 6445

In natural environments, voltage gradients can be created in soil or sediments from inherent microbial activity. Present work has utilized sediment microbial fuel cell or s‐MFC for dark flocculent surface sediments to see bioelectricity generation potential at Jaipur, Rajasthan in India. Using a glucose rich substrate media and low external resistance, system generated external voltage of around 500...

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Search results

Third-order local nonlinear microwave response of YBa/sub 2/Cu/sub 3/O/sub 7/ and Nb thin films

A redox‐additive electrolyte for cobalt‐manganese‐layered double hydroxides‐based asymmetric supercapacitor

Hardness, corrosion behavior, and microstructure of Al-Cu-Mg alloy as a function of 0.3 wt.% Zr addition

Van der Waals Epitaxial Trilayer MoS₂ Crystals for High‐Speed Electronics

Analysis and experimental investigation on passive direct methanol fuel cell current collectors with taper cylindrical openings

Unprecedented Multifunctionality in 1D Nb_1‐_xTa_xS₃ Transition Metal Trichalcogenide Alloy

Investigation of Electrical Parameters of CdTe Photovoltaic Devices by Computational Analysis

The Performance of Electrocoagulation Process in Removing Organic and Nitrogenous Compounds from Landfill Leachate in a Three-Compartment Reactor

A Study of Magnetic Reconnection

Effect of the Applied Current Density and Deposition Time on Electro-Codeposition Process of Cobalt Matrix Reinforced with Nano-CeO₂

Combination of absorptive notch filter and tunable dual‐band conventional notch filter

New design of low profile Uniform Substrate integrated waveguide antenna with square patch loaded

Numerical simulation of solid oxide fuel cells comparing different electrochemical kinetics

Computer modeling of electrochemical processing of waste nuclear fuel

Design strategy of electrode patterns based on finite element analysis in microfluidic device for Trans‐Epithelial Electrical Resistance (TEER) measurement

Boosting Production of HCOOH from CO₂ Electroreduction via Bi/CeO_x

Boosting Production of HCOOH from CO₂ Electroreduction via Bi/CeO_x

Combination effects of flow field structure and assembly force on performance of high temperature proton exchange membrane fuel cells

Numerical analysis of wave‐shaped flow field plate for proton‐exchange membrane fuel cell

Bioremediation analysis of sediment‐microbial fuel cells for energy recovery from microbial activity in soil

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