Results 51 to 60 of about 6,165,130 (277)

Balancing Hydrophobicity and Hydrophilicity: Dual Filler‐Engineered Proton Exchange Membranes for Durable, High‐Power Fuel Cells

Advanced Functional Materials, EarlyView.
Polarity‐matched Zr–MOFs program Nafion's nanoscale morphology during solution casting. Hydrophilic UiO‐66 preserves hydrated pathways, while hydrophobic UiO‐67 increases the proton hopping sites by densifying ionic clusters. Combining both fillers yields a membrane that delivers 176 mS cm−1 conductivity, reaches 1.46 W cm−2 under 200 kPa, and triples ...
Yonghwi Cho, Yunseong Ji, Minkyu Choi, Junsu Kim, Yejin Kim, Su Jeong Lee, Wooyoung Choi, Choong Hoo Lee, Ju Yeon Kim, Ohchan Kwon, Hanim Kim, Du Yeol Ryu, Ki Chul Kim, Dae Woo Kim   +13 more
wiley   +1 more source

Tailoring Light Management in All‐Perovskite Tandem Solar Cells: The Impact of Nanotextures

Advanced Functional Materials, EarlyView.
To further improve the power conversion efficiency of all‐perovskite tandem solar cells, light management strategies need to be implemented. Front‐sided nanotextures reduce reflection losses, which boosts light absorption, thus increasing the tandem JSC, which is further supported by reducing parasitic absorption.
Sebastian Berwig, Yeonghun Yun, Doyun Im, Isabella Taupitz, Alexandros Cruz, Marlene Härtel, Bor Li, Kevin J. Prince, Hanifah Winarto, Thomas W. Gries, Klaus Jäger, Florian Riesebeck, Daniele Mantione, Sharon Monaci, Silvia Mariotti, Vishnu Vijayakumar, René A. J. Janssen, Sangwook Lee, Bernd Stannowski, Christiane Becker, Philipp Tockhorn, Steve Albrecht   +21 more
wiley   +1 more source

Non-Hermitian topological electric circuits with projective symmetry

Frontiers of Physics
12 pages,7 ...
Zhang, Wenjie, Yang, Yuting, Shen, Xiaopeng, Shi, Liwei, Hang, Zhi Hong   +4 more
openaire   +3 more sources

The Complexity of Classes of Pyramid Graphs Based on the Fritsch Graph and Its Related Graphs

Axioms
A quantitative study of the complicated three-dimensional structures of artificial atoms in the field of intense matter physics requires a collaborative method that combines a statistical analysis of unusual graph features related to atom topology ...
Ahmad Asiri, Salama Nagy Daoud
doaj   +1 more source

The Comparative Study on the Li-S and Li-ion Batteries Cooperating with the Photovoltaic Array

Energies, 2020
The stationary photovoltaic array can be used to charge the different vehicle batteries and, in parallel, be used as a power source for the utility grid or standalone devices placed such as in campers.
Krystian Siczek, Krzysztof Siczek, Piotr Piersa, Łukasz Adrian, Szymon Szufa, Andrzej Obraniak, Przemysław Kubiak, Wojciech Zakrzewicz, Grzegorz Bogusławski   +8 more
doaj   +1 more source

Unified Phase‐Field Framework for Antiferroelectric, Ferroelectric and Dielectric Phases: Application to HZO Thin Films

Advanced Functional Materials, EarlyView.
HfxZr1−xO2${\rm Hf}_x{\rm Zr}_{1-x}{\rm O}_2$ offers CMOS‐compatible nanoscale ferroelectricity yet suffers from a high Ec${\rm E}_c$ demanding large operating voltages. A unified phase‐field framework spanning AFE/FE/DE phases shows how FE grains soften neighboring AFE grains over λ$\lambda$ ≈$\approx$ 22–37 nm.
P. Pankaj, Sandeep Sugathan, Jiyoung Kim, Si Joon Kim, Pil‐Ryung Cha   +4 more
wiley   +1 more source

Experimental observation of topological disclination states in lossy electric circuits

Physical Review B
Topological phase transitions can be remarkably induced purely by manipulating gain and loss mechanisms, offering a novel approach to engineering topological properties. Recent theoretical studies have revealed gain-loss-induced topological disclination states, along with the associated fractional charge trapped at the disclination sites.
Jin Liu, Wei-Wu Jin, Zhao-Fan Cai, Xin Wang, Yu-Ran Zhang, Xiaomin Wei, Wenbo Ju, Zhongmin Yang, Tao Liu   +8 more
openaire   +2 more sources

CO2‐to‐CO Conversion in a Gas‐Fed, Zero‐Gap, PEM Electrolyzer Enabled by Polycations and Nitrogen‐Doped Carbon‐Supported Cobalt Nanoparticles

Advanced Functional Materials, EarlyView.
A gas‐fed, zero‐gap, PEM CO2 electrolyzer is realized by incorporating PDDA+ ions onto the carbonaceous Co/N‐C electrocatalyst, with gaseous H2 and CO2 fed into the anode and cathode, respectively. Operating without an aqueous electrolyte, the system sustains a peak FECO of 65.1% at 100 mA cm−2. ABSTRACT Electrochemical carbon dioxide reduction (ECO2R)
Yuen Leong Chow, Hsi‐Wen Wu, Aimin Li, Yalou Guo, Duhong Chen, Jie Zhang, Paul A. Webley   +6 more
wiley   +1 more source

Time Dependency of Current Harmonics for Switch-Mode Power Supplies

Applied Sciences, 2020
This paper presents the time-dependent variance in the current harmonics emission by power supplies during power quality measurements. Power quality problems are becoming more significant with the adoption of power electronic-based circuits such as power
Muhammad Naveed Iqbal, Lauri Kütt, Bilal Asad, Toomas Vaimann, Anton Rassõlkin, Galina L. Demidova   +5 more
doaj   +1 more source

Frequency response and gap tuning for nonlinear electrical oscillator networks. [PDF]

PLoS ONE, 2013
We study nonlinear electrical oscillator networks, the smallest example of which consists of a voltage-dependent capacitor, an inductor, and a resistor driven by a pure tone source. By allowing the network topology to be that of any connected graph, such
Harish S Bhat, Garnet J Vaz
doaj   +1 more source