Results 71 to 80 of about 248 (199)

Retificador PFC Monofásico Bridgeless Baseado em Interruptores GaN HEMT Empregando Estratégia de Modulação Pwm de Alta Resolução Implementada em FPGA

Eletrônica de Potência, 2019
Interruptores de potência baseados em materiais do tipo wide bandgap propiciam o uso de elevada frequência de comutação sem aumento significativo das perdas do conversor.
Murilo K. Lohn, André S. de Carvalho, José A. Arbugeri, Tiago K. Jappe, Samir A. Mussa   +4 more
doaj   +1 more source

Toward Fast Proton Shuttling in Acidic Oxygen Evolution Reaction

Advanced Functional Materials, EarlyView.
This review establishes proton transfer dynamics as a descriptor governing acidic OER activity, moving beyond the kinetic constraints derived from the proton coupled electron transfer. We discuss how deprotonation governs classical mechanisms, including adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM) and oxide path mechanism (OPM ...
Ashish Gaur, Jaeyeong Kim, Sungwook Mhin, HyukSu Han   +3 more
wiley   +1 more source

Retificador Entrelaçado Com Elevado Fator De Potência Para Operação De Um Veículo Trólebus Alimentado Por Redes Em Ca Ou Cc

Eletrônica de Potência, 2010
Este artigo apresenta o desenvolvimento e os principais resultados para um retificador boost entrelaçado operando como um estágio especial de potência de entrada para um veículo tipo trólebus, permitindo sua alimentação por sistemas de distribuição em ...
Carlos Alberto Canesin, Guilherme de Azevedo e Melo, Flávio Alessandro Serrão Gonçalves, Rodrigo Alessandro Nunes de Oliveira, Jerry Marco Muno, Marcelo dos Santos   +5 more
doaj   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source

Coupling Anodic Activity and Stability at Ni‐Based Non‐Oxide Catalysts via Coordinating Alcohol Oxidation and Oxygen Evolution

Advanced Functional Materials, EarlyView.
A cooperative and competitive interrelationship between alcohol oxidation (AOR) and water oxidation (OER) was observed on a typical anode catalyst of Ni2P. In situ Raman spectroscopy and electrochemical analyses revealed a specific complementary mechanism between them, in which OER and AOR critically contribute to the activity and stability of anodic ...
Yong Yan, Xinyu Liu, Yuguo Zhao, Hanwen Jian, Huan Zhou, Riyi Zhang, Dong Wang, Peter Schaaf, Lihua Wang, Guangsheng Guo, Xiayan Wang   +10 more
wiley   +1 more source

Submicron Metasurface Reconfigured Multiband Smart Windows

Advanced Functional Materials, EarlyView.
This work presents a submicron metasurface reconfigured multiband thermochromic smart window. By integrating subwavelength nanostructures into a Fabry−Perot resonator configuration, it mitigates conventional trade‐offs to simultaneously deliver high luminous transmittance and robust solar heating and radiative cooling modulation capabilities ...
Guanya Wang, Shancheng Wang, Bin Li, Xinyi Tian, Rong Liu, Jian Chen, Zhendong Dai, Shouqin Tian, Yi Long   +8 more
wiley   +1 more source

Sustainable Electrochemical Synthesis of High‐Quality MXenes: Mechanistic Insights, Applications, Challenges, and Technological Prospects

Advanced Functional Materials, EarlyView.
Electrochemical etching provides an eco‐friendly alternative to hazardous HF methods for MXene production. This approach facilitates the selective isolation of the A‐layer from MAX phases with tunable surface terminations. Controlling voltage, electrolytes, temperature, and duration enables the optimal structural integrity. Nevertheless, existing scale
Jagdeep Singh, Madhusudhana M Devadiga, Santosh K. Tiwari, AS Dhaliwal, Gurpreet Singh Selopal   +4 more
wiley   +1 more source

Reator eletrônico de alto fator de potência com tensão constante no barramento contínuo

Eletrônica de Potência, 1998
Este artigo apresenta um reator eletrônico de alto fator de potência baseado em um único estágio de processamento de potência. Através do controle da frequência de chaveamento as tensões do barramento CC e das chaves semicondutoras são mantidas ...
Ricardo O. Brioschi, Marcelo M. Lamego, José L. F. Vieira   +2 more
doaj   +1 more source

Conversores Integrados Híbridos: Passive-Stacked 3 RD Order (PS3) Boost

Power management integrated circuits (PMICs), in the form of DC/DC converters, play a significant role in today's market due to their wide range of applications in the electronics industry. Among the hybrid converter topologies that meet this demand, the Passive-Stacked 3rd Order (PS3) buck stands out, achieving 98.8% efficiency when fully integrated ...
Castellanos Rodriguez, Juan Camilo, Aquino Henn, Tales   +1 more
openaire   +2 more sources

Redirecting Nano‐Silicon Agglomeration: Dual‐Carbon Design Triggers Self‐Adaptive Nanoporous Si Sponge for Enhanced Lithium Storage

Advanced Functional Materials, EarlyView.
This study addresses silicon anode degradation using an engineered nSi/Gr/C dual‐carbon matrix. By restricting SEI infiltration, the architecture redirects silicon agglomeration into a beneficial structural self‐adaptive activation. During cycling, silicon nanoparticles self‐organize into a resilient nanoporous sponge. This dynamic network accommodates
Wei Zhang, Yuxia Zhong, Wen Ren, Lei Zhang, Yexin Pan, Mitch Guijun Li, Gary J. Cheng, Ruohan Yu   +7 more
wiley   +1 more source