Results 91 to 100 of about 3,801 (279)

Fast charging techniques and compact integrated implementations for electrochemical double layer capacitors in portable applications

, 2014
The widespread increase in the range and types of portable electronic devices in the past decades has resulted in higher requirements for energy storage and conversion modules.
Bodnar, Rares
core  

Targeted Modulation of d‐Band Center in MoS2 Interlayer With n‐Type Co/Fe Dopants Accelerating Sulfur Reaction Kinetics in Lithium‐Sulfur Batteries

Advanced Materials, EarlyView.
A targeted modulation of the MoS2 electronic structure is achieved via substitutional n‐type Co/Fe co‐doping. This strategy triggers S‐mediated d‐p hybridization, optimizing the binding affinity with polysulfides to establish a volcano‐shaped relationship between the d‐band center and catalytic activity.
Junhyuk Ji, Sangyeon Won, Jaehyeong Yu, Nuri Moon, Dongwoo Kim, Junbeom Maeng, Won Bae Kim   +6 more
wiley   +1 more source

A Cost-Effective and High-Efficiency Novel 15-Level Hybrid MLI Topology for Renewable Energy Systems

Gazi Üniversitesi Fen Bilimleri Dergisi
In this paper, a new hybrid model for single DC source multilevel inverters (MLIs) is proposed. The proposed switched diode (SD) and high frequency link (HFL) hybrid structure utilizes a single DC source voltage and supplies multiple DC voltages to the ...
Murat Karakılıç, Hasan Hataş
doaj   +1 more source

Suppressing Surface Degradation in Na‐Rich Prussian Blue Cathodes via Liquid‐Phase Dehydration

Advanced Materials, EarlyView.
Gas bubbling in a liquid medium lowers the local water vapor pressure and continuously removes desorbed water, enabling effective dehydration of Prussian Blue without inducing surface oxidation. This interfacial mass transfer‐driven process stabilizes the surface chemistry and improves electrochemical performance, providing a strategy for handling ...
Seunghye Jang, Hyebin Jeong, Jun Choi, Jeongsoo Hong, Jooyoung Jang, Jongyoon Han, Juwon Kim, Sang‐Min Lee, Changshin Jo   +8 more
wiley   +1 more source

Inductive Sensor Performance in Partial Discharges and Noise Separation by Means of Spectral Power Ratios

Sensors, 2014
Partial discharge (PD) detection is a standardized technique to qualify electrical insulation in machines and power cables. Several techniques that analyze the waveform of the pulses have been proposed to discriminate noise from PD activity.
Jorge Alfredo Ardila-Rey, Mónica Victoria Rojas-Moreno, Juan Manuel Martínez-Tarifa, Guillermo Robles   +3 more
doaj   +1 more source

Engineering CO2 Reduction Pathways via Alloy‐Support Interactions in Li‐CO2 Batteries

Advanced Materials, EarlyView.
Alloy‐support interactions in RuCu/NC induce interfacial charge redistribution and shift d‐band centers, steering CO2 reduction from Li2CO3 to metastable Li2C2O4. This pathway engineering lowers the rate‐determining barrier and suppresses carbonate formation, enabling high discharge voltage (3.23 V) in Li‐CO2 batteries with reduced overpotential (0.50 ...
Liang Sun, Xindan Zhang, Guang Feng, Guoqiang Zhao, Bernt Johannessen, Guanjie Li, Shilin Zhang, Hongge Pan, Zaiping Guo   +8 more
wiley   +1 more source

Optimization Design Study of a Full-Range Charged Calibration Device for a Low-Voltage Current Transformer

Energies
According to standards, the harmonic content should be less than 5% at the time of calibration, while the calibration index proposed in this paper stipulates that the primary current amplitude of 1%~120% of the full range of the accuracy level reaches 0 ...
Can Ding, Tingting Feng, Yaolong Bai, Yiji Shi   +3 more
doaj   +1 more source

Comparison of capacitive and inductive sensors designed for partial discharges measurements in electrical power apparatus

E3S Web of Conferences, 2017
In the paper results of simultaneously conducted measurements achieved using capacitive and inductive sensors are presented according to different PD model sources immersed in a mineral transformer insulation oil.
Kunicki Michał
doaj   +1 more source

Modelling approaches for DC-DC converters with switched capacitors

, 2015
In this paper we review relevant problems in the modelling of DC-DC converters with switched capacitors. We study several approaches that overcome the exposed modelling difficulties, addressing ideal and nonideal cases and using dynamic equations that ...
Rapisarda, P., Rosas Caro, J.C., Mayo Maldonado, J.C.   +2 more
core   +1 more source

Facile Synthesis and Application of Dibutyl Aminophosphonate Polymer for Robust Uranium Capture from Concentrated Nitric Acid Process Streams

Advanced Materials Interfaces, EarlyView.
Dibutyl aminophosphonate (DiBAP) resin enables rapid, highly selec ve recovery of trace U(VI) from strongly acidic streams, with excellent acid stability, efficient column performance, and quan ta ve regenera on using ammonium carbonate. ABSTRACT The recovery of trace uranium from strongly acidic streams generated during uranium processing is of ...
Vinita Kumari, Ritesh Ruhela, Mahesh Tiwari, Deepak Tyagi, Sanjay Kumar Sahu   +4 more
wiley   +1 more source