Results 81 to 90 of about 206 (188)

NUMERICAL INVESTIGATION OF FLOW FIELD IN PROTON EXCHANGE MEMBRANE FUEL CELL AT DIFFERENT CHANNEL GEOMETRIES [PDF]

Journal of Engineering Science and Technology, 2018
This paper reports the three-dimensional modelling of a proton exchange membrane fuel cell (PEMFC) with straight flow field designs. Different shapes of both anode and cathode channels have been considered. Three geometrical configurations with same area:
R. HADJADJ, W. KAABAR
doaj  

Bipolar Covalent Organic Frameworks Crafting Core–Shell Heterostructured Cathode for High–Performance Lithium–Organic Batteries

Advanced Science, EarlyView.
A bipolar CNT@COF core–shell heterostructure cathode constructed via synergistic molecular and microstructural engineering enables rapid electron/ion transport and efficient utilization of electroactive groups for high–performance lithium–organic batteries. ABSTRACT Covalent organic frameworks (COFs) with tunable molecular structures and ordered porous
Yalong Jiang, Nan Jiang, Yu Dou, Zixuan Chen, Yunhai Zhu, Long Chen, Yingkui Yang   +6 more
wiley   +1 more source

Mass‐Transport–Engineered CCM Architecture Employing MPL‐Free Carbon Paper and Graphene‐Coated Ni Foam Channels for High‐Temperature PEM Fuel Cells

Advanced Science, EarlyView.
A CCM‐based architectural strategy is introduced for high‐temperature PEM fuel cells, enabling MPL‐free carbon paper gas diffusion layers via decal‐transfer processing. By co‐engineering the CCM, GDL, and a G‐foam flow field, oxygen transport is enhanced while phosphoric‐acid leakage is suppressed, resulting in high power density and stable operation ...
Seongmin Cho, Songi Oh, Mingyu Kim, Jung Hwa Choi, Sunjae Hwang, Ji‐Hoon Jang, Segeun Jang   +6 more
wiley   +1 more source

Prediction of DC Breakdown Strength for Polymer Nanocomposite Based on Energy Depth of Trap

Energies
Understanding the role of carrier traps in the determination of dielectric breakdown of polymer nanocomposite would yield a novel method for the estimation of breakdown strength of the material.
Xiaohu Qi, Jian Guan, Xuri Xu, Zhen Zhang, Chuanyun Zhu, Chenyi Guo, Qifeng Shang, Yu Gao   +7 more
doaj   +1 more source

Epitaxial Bi2O2Se/Bi2O5Se Thin Films: Revealing Electric‐Field‐Driven Oxidation and Resistive Switching Dynamics for Advanced Memory Devices

Advanced Science, EarlyView.
Bi2O2Se/Bi2O5Se bilayer heterostructure exhibits reversible structural evolution during device operation, directly revealed by atomic‐scale investigation. Oxygen vacancy redistribution governs filament formation and rupture, enabling stable multilevel resistive switching and synaptic‐like behaviors.
Yen‐Jung Chen, Yong‐Jyun Wang, Zi‐Qin Hong, Chien‐Hua Wang, Yi‐Ning Wang, Jia De Cheng, Chun‐Wei Huang, Ying‐Hao Chu, Wen‐Wei Wu   +8 more
wiley   +1 more source

Trifunctional Kinetic Regulation Enables Low‐Defect Solution Grown Single Crystals for X‐Ray Detection

Advanced Science, EarlyView.
This work presents a molecular‐level kinetic regulation strategy employing iodoacetic acid (IAA) to simultaneously suppress point defects and solvent inclusion in solution‐grown Cs4PbI6 single crystals. The obtained crystals demonstrate significantly enhanced charge transport properties, enabling X‐ray detectors with high sensitivity, low noise, and ...
Hui Zhang, Zihan Wang, Zhenyu Wang, Changmao Wan, Zheng Liang, Huifen Xu, Yuanbo Ma, Yupeng Liu, Xu Pan, Jiajiu Ye   +9 more
wiley   +1 more source

Coupled Vacancy and Phonon‐Scattering Engineering Drive Defect Evolution Toward Multifunctional High‐Performance Bi2Te3 Thermoelectrics

Advanced Science, EarlyView.
ZnSb reduces carrier concentration and suppresses Te volatilization, while Se substitution within QLs softens phonons and enhances anharmonicity. Swapped bilayers near twin boundaries strengthen phonon scattering and interlayer bonding. As a result, the optimal sample achieves an ultra‐high zT ∼1.51, cooling temperature difference of ∼70 K, power ...
Ruiheng Li, Minwen Yang, Huangshui Ma, Jie Zheng, Shengqiang Cui, Xiaobo Tan, Xuri Rao, Xiang An, Zongxiang Kan, Siqi Huo, Jing Shuai, Min Hong, Ran Ang   +12 more
wiley   +1 more source

Study on space charge distribution in high-voltage DC bushing based on bipolar carrier transport model

Journal of Physics: Conference Series
Abstract With the development of high-voltage power transmission technology, the research on the space charge distribution in high-voltage DC bushings has become increasingly important. Previous studies have certain limitations in materials, model applicability, and working conditions.
Hongcang Zou, Shuo Yang, Jiaxu Ding, Junjie Yang   +3 more
openaire   +1 more source

Electrohydraulic Folding Ring Actuators for Radially Contracting Applications

Advanced Science, EarlyView.
This work presents an Electrohydraulic Folding Ring Actuator that combines high‐performance electrohydraulic actuation with origami‐inspired folding geometry to achieve constricting radial actuation. This integration yields significant inner lumen constriction, alongside a gripping force capable of holding objects exceeding four times the actuator's ...
Gavril Yong En Tan, Quan Xiong, Jonathan William Ambrose, Zeynep Altundal, Raye Chen‐Hua Yeow   +4 more
wiley   +1 more source

Role of annealing conditions on the resistive switching behavior of solution processed formamidinium lead bromide FaPbBr3 devices

Nano Trends
Hybrid organic-inorganic halide perovskites (OIHPs) are emerging as strong contenders for next-generation flexible nonvolatile memory systems due to their fascinating properties, including mixed ionic-electronic transport, high abundance, and cost ...
Amrita Singh, Saumya Paliwal, Aditi Upadhyaya, Saral Kumar Gupta, C.M.S. Negi   +4 more
doaj   +1 more source