Produção Nacional
... tema, e como as meticulosas pesquisas experimentais de Joule permitiram a demonstração da equivalência de diferentes tipos de energia e contribuíram de forma definitiva para a elaboração da primeira lei da termodinâmica.
Tópico(s): Science and Science Education
2009 - SOCIEDADE BRASILEIRA DE FÍSICA | Revista Brasileira de Ensino de Física
Lei Li, Yanxia Cao, Xiaoya Liu, Jianfeng Wang, Yanyu Yang, Wanjie Wang,
The burgeoning development of wearable electronic devices has resulted in urgent demands for electromagnetic interference (EMI) shielding films that feature excellent fireproof and heat dissipation capability. Herein, multifunctional fireproof EMI shielding films with excellent anisotropic thermal conductivity are constructed based on MXene and montmorillonite (MMT) via a simple vacuum-assisted filtration technique. The presence of MMT can protect the MXene from oxidation and endow the composite films ...
Tópico(s): Graphene research and applications
2020 - American Chemical Society | ACS Applied Materials & Interfaces
Yang Song, Ding‐Xiang Yan, Yue Li, Jun Lei, Zhong‐Ming Li,
Polymeric films with high electromagnetic interference (EMI) shielding effectiveness (SE) and polyfunctionality are highly desirable for wearable electronic devices. Herein, a sandwich-structured EMI shielding film with Joule heating performance composed of a poly(vinylidene fluoride) (PVDF) layer and a conductive filler layer (silver nanowire (AgNW) and MXene) was constructed by electrostatic spinning, vacuum-assisted filtration (VAF), and hot compression. An independent AgNW layer endowed the film with ...
Tópico(s): Advanced Antenna and Metasurface Technologies
2021 - American Chemical Society | Industrial & Engineering Chemistry Research
Yuxuan Zhang, Lei Li, Yanxia Cao, Yanyu Yang, Wanjie Wang, Jianfeng Wang,
High-strength nonmetallic materials with low infrared (IR) emission are rare in nature, yet highly anticipated especially in military and aerospace fields for thermal camouflage, IR stealth, energy-saving heating. Here, we reported a high-strength (422 MPa) nonmetallic film with very low IR emissivity (12%), realized by constructing alternating multilayered structures consisting of successive MXene functionalized outer layers and continuous GO reinforced inner layers. This nonmetallic film is capable ...
Tópico(s): Metamaterials and Metasurfaces Applications
2022 - Royal Society of Chemistry | Materials Horizons
Ziquan Wang, Zheng Li, Yong Bo, Haiyan Huang, Lei Yao, Libo Deng,
• Dual-layer MXene/PET-PTFE conductive membrane was fabricated via vacuum assisted filtration method (VAF). • Electro-oxidation of Ti 3 C 2 T x MXene in ionizable media is effectively depressed by applying high-frequency alternating current. • The mechanism for the stabilization of the electrothermal system was unveiled by electrochemical impedance spectroscopic study. • A flux enhancement of 333% is achieved by MXene based Joule heating membrane distillation system (JHMD). Membrane distillation (MD) is a promising ...
Tópico(s): Energy Harvesting in Wireless Networks
2023 - Elsevier BV | Chemical Engineering Journal
Meng Zhu, Xuanxuan Yan, Xin Li, Lei Dai, Junhao Guo, Yuting Lei, Yongjian Xu, Hailong Xu,
An optical transparent and hazy film with admirable flexibility, electromagnetic interference (EMI) shielding, and Joule heating performance meeting the requirements of optoelectronic devices is significantly desirable. Herein, a cellulose paper was infiltrated by epoxy resin to fabricate a transparent cellulose paper (TCP) with high transparency, optical haze, and favorable flexibility, owing to effective light scattering and mechanical enhancement of the cellulose network. Moreover, a highly connected ...
Tópico(s): Nanomaterials and Printing Technologies
2022 - American Chemical Society | ACS Applied Materials & Interfaces
Jieqiong Liu, Dexu Zheng, Kai Wang, Zhipeng Li, Shengzhong Liu, Peng Lei, Dong Yang,
Flexible perovskite solar cells (FPSCs) have garnered significant interest due to their potential applications. However, achieving efficient large-area FPSCs remains a challenge despite lab-scale efficiency exceeding 24%. The shift from lab research to the industrial level will face many transitional problems, such as scaling up production, maintaining consistent product quality, optimizing material utilization, addressing safety concerns, and ensuring cost-effectiveness. This review offers a comprehensive ...
Tópico(s): Quantum Dots Synthesis And Properties
2024 - Elsevier BV | Joule
Zhen Xiang, Xiao Wang, Xiang Zhang, Yuyang Shi, Lei Cai, Xiaojie Zhu, Yanyan Dong, Wei Lü,
Two-dimensional (2D) MXene materials have potential applications in electromagnetic pollution elimination and energy conversion fields owing to their high carrier mobility, specific surface area and unique layered features. Here, we demonstrated a controlled self-assembly strategy to construct multifunctional nano/microstructured 2D Ti3CNTx MXene-based composites for efficient electromagnetic attenuation and Joule energy conversion application. The multiple compositions and novel architecture endowed ...
Tópico(s): Antenna Design and Analysis
2021 - Elsevier BV | Carbon
Hui Shao, Lulu Cai, Shan Di, Kaixuan Wang, Lei Li, Guojun Zhang, Yongqing Zhao,
Tópico(s): Microstructure and mechanical properties
2018 - Springer Science+Business Media | Journal of Materials Science
Bibo Wang, Pengfei Jia, Ruofan He, Lei Song, Yuan Hu,
High-performance modern integrated intelligent wearable electronic textiles show excellent joule heating performance, electromagnetic interference shielding (EMI) and fire safety. In this work, cotton fabric as a biomass material is used as the framework. Due to its strong electrostatic interaction and hydrogen bonding, 3‑aminopropyl trethoxy silane (KH550) layer, silver nanowire (AgNW) conductive network and water-based polyurethane (WPU) protective layer are formed on the surface of cotton fiber for ...
Tópico(s): Advanced Antenna and Metasurface Technologies
2022 - Elsevier BV | Journal of Colloid and Interface Science
Xinxin Li, Min Yang, Wenjing Qin, Changshun Gu, Lei Feng, Zhenhao Tian, Hanying Qiao, Junji Chen, Jianxing Chen, Shougen Yin,
With the development of wearable intelligent devices, flexible textiles integrate high-performance sensing, electromagnetic shielding and Joule heating show broad application prospects. However, it is still difficult to improve all the performance simultaneously through simple methods. Here, we have prepared MXene/PU composite fiber film with multilayer porous network structure by using the electrospinning spraying alternate operation process. This film has ultra-high sensitivity (GF= 77,751), super ...
Tópico(s): Dielectric materials and actuators
2022 - Elsevier BV | Colloids and Surfaces A Physicochemical and Engineering Aspects
Xiansheng Zhang, Xifeng Wang, Zhiwei Lei, Lili Wang, Mingwei Tian, Shifeng Zhu, Hong Xiao, Xiaoning Tang, Lijun Qu,
Although flexible and multifunctional textile-based electronics are promising for wearable devices, it is still a challenge to seamlessly integrate excellent conductivity into textiles without sacrificing their intrinsic flexibility and breathability. Herein, the vertically interconnected conductive networks are constructed based on a meshy template of weave cotton fabrics with interwoven warp and weft yarns. The two-dimensional early transition metal carbides/nitrides (MXenes), with unique metallic ...
Tópico(s): MXene and MAX Phase Materials
2020 - American Chemical Society | ACS Applied Materials & Interfaces
Jiahui Zhao, Ziyang Wang, Xinyao Fang, Li Yang, Chuanqiang Wu, Wei Gan, Yu Zhou, Lei Shan, Yunxiang Lin,
High-entropy alloys (HEAs) are considered as considerable candidate for electrocatalytic water splitting. The main holdback locates in fabricating well-defined HEAs with moderate electronic structure and uncovering the structural evolution during the reaction process. Herein, we successfully synthesized NiCoFeCrMo HEA-nps by an ultrafast joule heating method for highly efficient oxygen evolution reaction (OER). The optimal graphene incorporated NiCoFeCrMo HEA nanoparticles (HEA-nps) exhibits finely ...
Tópico(s): Catalytic Processes in Materials Science
2023 - Elsevier BV | Journal of Alloys and Compounds
Zhiping Lei, Zhiming Du, Wenhao Yu, Jingchong Yan, Zhan‐Ku Li, Hengfu Shui, Shibiao Ren, Zhicai Wang, Ying Kong, Shigang Kang,
The excellent electrical, thermal, and mechanical properties of carbon films make them promising for application in functional devices. As the byproduct of the coking industry with low cost and large quantity, coal tar can be an alternative feedstock for preparing high-performance carbon films. This work adopts the negative-pressure chemical vapor deposition (NPCVD) approach to prepare thin films on a glass substrate with tunable electrical properties and thickness using coal tar as carbon source. ...
Tópico(s): Carbon Nanotubes in Composites
2021 - American Chemical Society | ACS Applied Electronic Materials
Produção Nacional
Thiago Macedo, Samuel Rodrigues Gomes,
... dos conceitos de Resistência e Resistividade, aplicações da Lei de Ohm e do efeito Joule. Esperamos que as videoaulas sejam uma ferramenta facilitadora, ...
Tópico(s): Education during COVID-19 pandemic
2023 - | EmpíricaBR - Revista Brasileira de Gestão Negócio e Tecnologia da Informação
Xin He, Lei Feng, Haojie Song, Jiaxu Zhang, Peng Wei, Xiaohua Jia, Jin Yang, Yong Li, Dan Shao, Sizhe Wang, Qiang Song,
High-performance electromagnetic interference (EMI) shielding and thermal management materials with ultraflexibility, high strength, outstanding stability under mechanical deformation, and low cost are urgently demanded for modern integrated electronic and telecommunication systems. However, the creation and application of such desirable materials is still a potent challenge. Herein, we develop such a high-performance multifunctional multilayer composite, known as vertically aligned carbon nanotube@ ...
Tópico(s): Dielectric materials and actuators
2022 - American Chemical Society | ACS Applied Nano Materials
In a recent Science Bulletin article, Dong et al. reported a quasi-one-dimensional TlCu3Te2 bulk material with an application-level room temperature ZT of 1.3 benefited from the pancake-like Fermi pocket with quasi-one-dimensional dispersion at narrow band-gap edge and the large, anharmonic quasi-one-dimensional lattice of heavy Tl+ and weakly bonded Cu+ ions. In a recent Science Bulletin article, Dong et al. reported a quasi-one-dimensional TlCu3Te2 bulk material with an application-level room ...
Tópico(s): Heusler alloys: electronic and magnetic properties
2023 - Elsevier BV | Joule
Lei Zheng, Matteo Ambrosetti, Alessandra Beretta, Gianpiero Groppi, Enrico Tronconi,
The growing environmental concerns have driven catalytic CO2 valorization as a forward-looking solution to mitigate the carbon footprint of valuable chemical products. CO2 conversion processes into synthesis gas, such as CO2 reforming of methane (CRM) or reverse water–gas shift (RWGS), may have a strategic role for the future sustainable production of chemicals and energy carriers. However, fuel combustion to supply the heat of the associated endothermic reactions would result in unwanted CO2 emissions, ...
Tópico(s): Catalytic Processes in Materials Science
2023 - Elsevier BV | Chemical Engineering Journal
Lei Shi, Zongyi Han, Yixuan Feng, Changgeng Zhang, Qi Zhang, He Zhu, Shiping Zhu,
It is well known that heat is generated when an electric current passes through an electrical conductor. While various applications in our daily lives and industries utilize the heating of electronic conductors, little attention has been paid to the potential of ionic conductors for heating purposes. This is because of the "inevitable" electrochemical reactions, which can result in unwanted electrolysis of conductors, corrosion of electrodes, and surface fouling. This paper reports the Joule heating ...
Tópico(s): Advancements in Battery Materials
2022 - Elsevier BV | Engineering
Haijun Wang, Junhao Guo, Yuting Lei, Weiyun Chen, Zhichao Zhang, Meng Zhu, Hailong Xu,
Transparent electromagnetic interference (EMI) shielding materials can be used for specific optoelectronic applications. Herein, a uniform silver nanowire (AgNW) network was fabricated on a commercial polyimide film via a spraying method. The interconnected and effective conductive network with welded junctions was fastened onto a sodium alginate-based biopolymer substrate via rod-coating and -transferring methods to improve electrical conductivity and optical transmittance of composite films simultaneously. ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2024 - American Chemical Society | ACS Applied Nano Materials
Xinxin Li, Boxin Zhao, Wenjing Qin, Min Yang, Lei Feng, Changshun Gu, Zhenhao Tian, Hengchao Liu, Xiujie Guo, Yan Zhang, Shougen Yin,
Developing multifunctional electronic fabrics with sensing capabilities, electromagnetic interference (EMI) shielding, and Joule heating performance holds great significance for health monitoring and medical protection. However, most fabrics struggle to combine multiple functions and optimize them simultaneously. For example, achieving both high sensitivity and a wide detection range in sensing devices remains a challenge. In this paper, we present a multidimensional composite structure comprising ...
Tópico(s): MXene and MAX Phase Materials
2023 - American Chemical Society | ACS Applied Nano Materials
Yiheng Gu, Zhiyu Chen, Zhicheng Wang, Shoufu Yu, Lei Bi,
Tópico(s): Fuel Cells and Related Materials
2025 - Springer Science+Business Media | Journal of Advanced Ceramics
Zhouyue Lei, Wei Gao, Peiyi Wu,
Thermocells hold great potential for continually harvesting waste heat to power ubiquitous electronics, but their integration is hampered by leakage risk and poor mechanical properties of liquid electrolytes. Although some physically crosslinked networks have been introduced to prepare leak-free quasi-solid thermocells, they are easy to break because of extremely small fracture energies of about 10 J m−2 and limited by low output power densities of 0.01–0.06 mW m−2 K−2. Herein, this study designs ...
Tópico(s): Thermal properties of materials
2021 - Elsevier BV | Joule
Tai-Bao Yang, Ji‐You Zong, De‐Zhuang Jia, Ling Xu, Yueyi Wang, Li‐Chuan Jia, Ding‐Xiang Yan, Jun Lei, Zhong‐Ming Li,
Conductive composite textiles (CCTs) as multifunctional integrated platform provide an effective path for developing flexible electromagnetic interference (EMI) shielding composites. However, conventional CCTs suffer from EMI shielding performance failure or the loss of textile's intrinsic properties under large tensile strain. Hence, in this work, a stretchable EMI shielding CCT that retains the inherent attributes of textile is proposed via weft-knitting and in-situ chemical Ag deposition. The complete ...
Tópico(s): Advanced Antenna and Metasurface Technologies
2024 - Elsevier BV | Chemical Engineering Journal
Hao Wang, Ruiping Liu, Yutao Li, Xujie Lü, Qi Wang, Shiqiang Zhao, Kunjie Yuan, Zhiming Cui, Xiang Li, Sen Xin, Ru Zhang, Ming Lei, Zhiqun Lin,
Summary Transition metal oxide catalysts with high oxygen reduction activity and durability are highly desirable for use in fuel cells and metal-air batteries. Herein we report, for the first time, the oxygen reduction activity of hollow porous spinel AB 2 O 4 microspheres, where A = Zn 2+ and B = Mn 3+ and/or Co 3+ (i.e., ZnMn x Co 2−x O 4 ). Among them, ZnMnCoO 4 ( x = 1) microspheres exhibit the best oxygen reduction activity with a half-wave-potential only 50 mV lower than that of the Pt/C counterpart and an excellent ...
Tópico(s): Fuel Cells and Related Materials
2017 - Elsevier BV | Joule
Mengxin Liu, Haoran Zhang, Ziyi Zhang, Kunlai Zhang, Zhenwu Chen, Lei Pan, Jintang Zhou,
The modern 5G communication electronics and systems require lightweight and flexible films that have superior electromagnetic interference (EMI) shielding performance as well as high thermal conductivity. This work reports a facile "one-pot" synthesis strategy to create EMI shielding films with a structure inspired by "jujube cake". The two-dimensional Ti3C2Tx MXene nanosheets were combined with one-dimensional bacterial cellulose (BC) to form a mechanically entangled supporting framework resembling ...
Tópico(s): Advanced Antenna and Metasurface Technologies
2024 - Elsevier BV | Composites Science and Technology
Qi Liu, Peilin Wang, Wei Zhang, Tian Mai, Meng‐Yu Qi, Lei Chen, Junfeng Li, Ming-Guo Ma,
In the era of increasing reliance on electronic devices, the development of flexible smart composite films that offer multifunctional capabilities such as electromagnetic shielding, sensing, infrared stealth, and autonomous heating is becoming increasingly significant. In this study, we fabricated polydopamine-modified cellulose scaffold/MXene composite films (PCM) using a densification strategy, resulting in films with a thickness of only 33 μm, outstanding tensile strength of 235.28 MPa, and excellent ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2024 - Elsevier BV | Chemical Engineering Journal
Yazhou Li, Zhiping Lei, Xue Yang, Jingchong Yan, Zhanku Li, Hengfu Shui, Shibiao Ren, Zhicai Wang, Ying Kong, Shigang Kang,
The fast-increasing demand for high-performance carbon conductive paints has motivated the use of inexpensive precursors and easy-to-manufacture methods to scale up production. The performance of carbon conductive paints highly depends on the precursor types, carbonization conditions and the coordination between carbon pigment and binder. This work investigated the effect of precursors (by-products of coking industry including coal tar pitch, anthracene oil, naphthalene oil, and washing oil) on the ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2022 - Elsevier BV | Progress in Organic Coatings
Heng Wei, Tengfei Lei, Libiao Ma, Weihua Li,
Tópico(s): Supercapacitor Materials and Fabrication
2024 - Elsevier BV | Ceramics International
Shengfan Wu, Jie Zhang, Zhen Li, Danjun Liu, Minchao Qin, Sin Hang Cheung, Xinhui Lu, Dangyuan Lei, Shu Kong So, Zonglong Zhu, Alex K.‐Y. Jen,
Perovskite solar cells (PVSCs) with p-i-n configuration bear great potential for flexible photovoltaics and all perovskite or Si-perovskite multijunction solar cells because of their low-temperature processability. Nevertheless, the state-of-the-art efficiencies of p-i-n structured PVSCs suffer from non-ideal interfacial recombination and charge-extraction losses. To address these challenges, we employed a large alkylammonium interlayer (LAI) to reduce the energy loss occurred between transport layers ...
Tópico(s): Chalcogenide Semiconductor Thin Films
2020 - Elsevier BV | Joule