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Hybrid Triboelectric-Electromagnetic Nanogenerators for Mechanical Energy Harvesting:A Review

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Nano-Micro Letters 2021年第12期13卷 163-220页

作者： Joao V.Vidal Vladislav Slabov andrei L.kholkin Marco P.Soares dos Santos Department of Physics and CICECO-Aveiro Institute of Materials University of Aveiro3810-193 AveiroPortugal Department of Physics and I3N University of Aveiro3810-193 AveiroPortugal Laboratory of Functional Low-Dimensional Structures National University of Science and Technology MISISMoscowRussia Department of Mechanical Engineering Centre for Mechanical Technology and Automation(TEMA)University of Aveiro3810-193 AveiroPortugal

Motion-driven electromagnetictriboelectric energy generators(E-TENGs) hold a Hybrid triboelectric-electromagnetic generators C A Bgreat potential to provide higher voltages,higher currents and wider operating bandwidths than Cantilever generators1 μm both electromagnetic and triboelectric generators Rotating generatorsSliding generators standing alone. Therefore,they are promising solutions to autonomously supply a broad range of Flexible blade generators Magnetoelectric highly sophisticated devices. This paper provides generators a thorough review focused on major recent breakLinear generators Multidimensional generators throughs in the area of electromagnetic-triboelectric vibrational energy harvesting. A detailed Pendulum generators analysis was conducted on various architectures including rotational,pendulum,linear,sliding,cantilever,flexible blade,multidimensional and 1 cm magnetoelectric,and the following hybrid technologies. They enable highly e cient ways to harvest electric energy from many forms of vibrational,rotational,biomechanical,wave,wind and thermal sources,among others. Open-circuit voltages up to 75 V,short-circuit currents up to 60 mA and instantaneous power up to 144 mW were already achieved by these nanogenerators. Their transduction mechanisms,including proposed models to make intelligible the involved physical phenomena,are also overviewed here. A comprehensive analysis was performed to compare their respective construction designs,external excitations and electric outputs. The results highlight the potential of hybrid E-TENGs to convert unused mechanical motion into electric energy for both large-and small-scale ***,this paper proposes future research directions toward optimization of energy conversion e ciency,power management,durability and stability,packaging,energy storage,operation input,research of transduction mechanisms,quantitative standardization,system integration,miniaturization and multi-energy hybrid cells.

关键词： E-TENG Hybrid triboelectric-electromagnetic Nanogenerators Energy harvesting

Lead-free piezoelectrics: Current status and perspectives

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Journal of Advanced Dielectrics 2013年第2期3卷 1-22页

作者： Indrani Coondoo Neeraj Panwar andrei kholkin Department of Materials and Ceramic Engineering&CICECO University of Aveiro3810-193 AveiroPortugal

In the last few years,there has been tremendous effort to develop lead-free ferroelectric ceramics with high piezoelectric properties by various doping and alloying *** material systems have been explored,however,no prominent alternative to the versatile lead zirconate titanate(PZT)system has been found *** the achieved improvement in piezoelectric properties,there are problems in the synthesis,processing and poling of the sintered *** processing techniques including microwave,hydrothermal,solgel,Pechini and spark plasma sintering have been used to overcome the drawbacks related to synthesis *** this paper,an attempt is made to review recent developments on lead-free piezo materials emphasizing their preparation,structureproperty relations,and consequent physical *** this context,both compositional and structural engineering approaches to achieve acceptable piezoelectric properties in lead-free materials are *** properties of the most promising lead-free compositions/families including titanates,alkaline niobates and bismuth perovskites and their solid solutions,along with non-perovskites such as bismuth layer-structured ferroelectrics are reviewed in detail.A brief coverage of the recent developments in the area of piezoelectric energy harvesting is also encompassed.

关键词： Lead-free piezoelectrics energy harvesting

FERROELECTRIC AND MAGNETIC PROPERTIES OF PEROVSKITE STRUCTURED Bi_(1-x-y)Gd_(x)Ba_(y)Fe_(1-y)Ti_(y)O_(3)MAGNETOELECTRIC CERAMICS

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Journal of Advanced Dielectrics 2011年第2期1卷 257-267页

作者： RADHESHYAM RAI IGOR BDIKIN M.A.VALENTE andrei L.kholkin Department of Ceramics and Glass Engineering and CICECO University of Aveiro 3810-193 AveiroPortugal Centre for Mechanical Technology and Automation University of Aveiro 3810-193AveiroPortugal Department of Physics University of Aveiro 3810-193 AveiroPortugal

Ternary solid solutions of BiFeO_(3),GdFeO_(3)and BaTiO_(3)have been prepared by solid-state reaction *** properties of these ceramics have been characterized in the tem-perature range between room temperature and 673 K and magnetic properties between 5 K and *** the understanding of the multiferroic property,the relation between the crystal structures,magnetic transition and ferroelectric transitions with increasing temperature have been *** ceramic samples show single perovskite *** Ba content exceeds 0.2 wt%,the sintering ability is weakened and the phase structure of Bi_(1-x-y)Gd_(x)Ba_(y)Fe_(1-y)Ti_(y)O_(3)(with x=0.2 and y=0.1,0.2,0.3,0.4,0.5)solid solution changes from rhombohedral to tetragonal *** maximum ferroelectric transition temperature(T_(c))of this system was in the range 154-165℃with the dielectric constant peak of 6000 for y=0.5 at 100 ***-saturated piezoresponse hysteresis loops were observed for all compositions indicating room temperature *** increasing Ba content(up to 0.3 wt%)the remanent magnetization M,increased and the coercive magnetic field decreased.

关键词： Ceramics X-ray difraction dielectric properties electrical properties magnetic properties

Structural,dielectric and magnetic properties of Pr-,Tb-and Dy-doped(Bi_(0.95)RE_(0.05))(Fe_(0.95)Mn_(0.05))O_(3) ceramics synthesized by solid-state reaction method

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Journal of Advanced Dielectrics 2013年第4期3卷 55-61页

作者： Radheshyam Rai Shweta Thakur M.A.Valente andrei L.kholkin School of Physics Shoolini University SolanHP 173229India Departamento de Fisica I3NUniversidade de Aveiro Campus Universitario de Santiago 3810-193 AveiroPortugal Department of Ceramics and Glass Engineering and CICECO University of Aveiro 3810-193 AveiroPortugal

The multiferroic(Bi_(0.95)RE_(0.05))(Fe_(0.95)Mn_(0.05))O_(3)(where RE=Pr,Tb and Dy)has been synthesized using solid-state reaction *** of Pr,Tb and Dy substitution on the structure,electrical and ferroelectric properties of(Bi_(0.95)RE_(0.05))(Fe_(0.95)Mn_(0.05))O_(3) samples have been studied by performing X-ray diffraction,dielectric measurements and magnetic *** crystal structure of the ceramic samples have a monoclinic *** vibrating sample magnetometer(VSM)measurement shows a significant change in the magnetic properties of Pr-,Tb-and Dy-doped(Bi_(0.9)RE_(0.05))(Fe_(0.95)Mn_(0.05))O_(3).It is seen that coercive field(Hc)and remanent magnetization(Mr)increases for Pr but decreases for Dy and Tb.

关键词： Ferrites X-ray diffraction dielectric properties electrical properties magnetic properties

IMPEDANCE AND MODULUS SPECTROSCOPY CHARACTERIZATION OF SODIUM-BISMUTH TITANATE-BASED LEAD-FREE FERROELECTRIC MATERIALS

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Journal of Advanced Dielectrics 2012年第1期2卷 48-58页

作者： DHANANJAY K.SHARMA RAJU KUMAR RADHESHYAM RAI SEEMA SHARMA andrei L.kholkin Ferroelectric Research Laboratory Department of Physics A N CollegePatna 800013India Department of Ceramics and Glass Engineering and CICECO University of Aveiro 3810-193AveiroPortugal

In this paper,we present impedance spectroscopy of Sodium Bismuth Titanate-based materials belonging to(1-x)TNa_(1/2)Bi_(1/2)TiO_(3)-xBaTiO_(3)(x=0.04)(NBT-BT)***-BT ceramics are prepared by high temperature solid-state reaction method.X-ray diffraction technique showed single-phase polycrystalline sample with an ABO3 perovskite *** behavior and the impedance relaxation were investigated in a wide range of temperature(room temperature(RT)-500℃)and frequency(1 kHz-1 MHz).A broad dielectric constant peak was observed over a wide temperature range around the phase transition *** complex impedance plot exhibited one impedance semicircle identified over the frequency range of 1 kHz-1MHz,which is explained by the grain effect of the *** centers of the impedance semicircles lie below the real axis,which indicates that the impedance response is a Cole-Cole type relaxation.

关键词： Ceramics X-ray diffraction piezoelectricity perovskite dielectric properties

Dielectric and magnetic properties of Ba-,La-and Pb-doped Bi_(0.8)Gd_(0.1)M_(0.1)Fe_(0.9)Ti_(0.1)O_(3) perovskite ceramics

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Journal of Advanced Dielectrics 2014年第2期4卷 26-34页

作者： Radheshyam Rai M.A.Valente Anoop Kumar Shukla Seema Sharma andrei L.kholkin School of Physics Shoolini UniversitySolanHP 173229India Departamento de Fisica I3NUniversidade de Aveiro Campus Universitario de Santiago3810-193 AveiroPortugal Department of Physics Amity Institute of Applied Sciences Amity University Uttar PradeshG.B.NagarUP 201301India Ferroelectric Research Laboratory Department of Physics A N CollegePatna 800013India Department of Ceramics and Glass Engineering and CICECO University of Aveiro 3810-193 AveiroPortugal

The multiferroic Bi_(0.8)Gd_(0.1)M_(0.1)Fe_(0.9)Ti_(0.1)O_(3),(where M=Ba(DB),La(DL)and Pb(DP))has been synthesized by using solid-state reaction *** of Ba,La and Pb substitution on the structure,electrical and ferroelectric properties of Bi_(0.8)Gd_(0.1)M_(0.1)Fe_(0.9)Ti_(0.1)O_(3) samples have been studied by performing X-ray diffraction,dielectric and magnetic *** crystal structures of the ceramic samples have a tetragonal *** vibrating sample magnetometer(VSM)measurement shows a significant change in the magnetic properties of Ba-doped Bi_(0.8)Gd_(0.1)M_(0.1)Fe_(0.9)Ti_(0.1)O_(3) as compared to La-and Pb-doped *** is seen that coercive field(HC)and remanent magnetization(MR)increases with Ba-doped ceramics but decreases for La-and Pbdoped ceramics.

关键词： Multiferroic X-ray diffraction dielectric properties electrical properties magnetic properties