Article
Chemistry, Multidisciplinary
Yang Liu, Libo Ding, Le Dai, Xuan Gao, Hanzhou Wu, Shuhao Wang, Chenggang Zhuang, Ling Cai, Zhen Liu, Lisha Liu, Ji Zhang, Yaojin Wang
Summary: With the rapid development of self-powered electronics, there is an increasing demand for power sources with high power density and long lifespan. This research focuses on the fabrication of large-scale flexible piezoelectric energy harvesters using yttrium stabilized zirconia ceramic, demonstrating excellent performance and potential applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Physical
Ruifeng Yue, Sankar Ganesh Ramaraj, Hailong Liu, Durgadevi Elamaran, Vidya Elamaran, Vinay Gupta, Sandeep Arya, Sonali Verma, Soumitra Satapathi, Yasuhiro Hayawaka, Xinghui Liu
Summary: Piezoelectric nanogenerator is a promising device that converts mechanical energy into electrical energy. The development of lead-free piezoelectric nanogenerator is necessary due to its less toxic nature. Materials such as ZnO and perovskite have been widely studied for their excellent piezoelectric properties and environmental friendliness. This review discusses the recent achievements and future possibilities of lead-free flexible energy harvesting devices, including stretchable piezoelectric nanowire and nanocomposite nanogenerators.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Green & Sustainable Science & Technology
Wenzheng Cai, Vesselina Roussinova, Vesselin Stoilov
Summary: This study proposes, designs, and tests a new concept of a small-scale piezoelectric wave energy harvester based on the acceleration-driven principle. Six piezoelectric generators placed in the enclosure are used as energy conversion devices, providing high-frequency response and the ability to withstand large strain. The device can operate at deployment sites with consistent medium/small wave energy flux and naturally float on the water surface. It is lightweight, cost-effective, and suitable for operation in remote rivers and lakes due to its self-generating capability.
Article
Green & Sustainable Science & Technology
Julien Le Scornec, Benoit Guiffard, Raynald Seveno, Vincent Le Cam, Stephane Ginestar
Summary: This paper presents an ultra-flexible piezoelectric air flow energy harvester capable of powering a wireless sensor. The method to easily adapt the aero-electric generator to the wind is presented, and different configurations have been tested to determine the best one for energy harvesting. The optimization of energy harvesting through mechanical and electrical coupling is also discussed, resulting in improved performance.
Article
Chemistry, Physical
Sourav Maity, Abhishek Sasmal, Epsita Kar, Shrabanee Sen
Summary: In this study, a lightweight and flexible hybrid energy harvester using a BTS/PDMS composite was developed. By strategically coupling the piezoelectric effect with the triboelectric output, the harvester achieved significantly enhanced output performance. The device could harvest energy from human finger force and differentiate fine patterns of different letters as a writing pad. A wireless power transmission system utilizing an inductor-based resonant coupling mechanism was also developed.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Textiles
Shohreh Mashayekhan, Hannaneh Kabir, Hadis Kamalidehghan, Roohollah Bagherzadeh, Mohammad Sajad Sorayani Bafqi
Summary: This study aims to manufacture a biocompatible and high-performance piezoelectric energy harvester (PEH) that is capable of being charged by the energy received from the heartbeat and store the generated voltage. By adding polyamide-11 (PA-11) and barium titanate (BaTiO3) nanoparticles to poly(vinylidene fluoride) (PVDF), the piezoelectric properties and sensitivity can be enhanced.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Chemistry, Multidisciplinary
Taoufik Slimani Tlemcani, Camille Justeau, Kevin Nadaud, Daniel Alquier, Guylaine Poulin-Vittrant
Summary: In this study, a flexible piezoelectric nanogenerator (PENG) based on zinc oxide (ZnO) nanowires grown on a PDMS substrate was fabricated using hydrothermal synthesis. The electrical characterization and output performance of the ZnO nanowires-based flexible PENG were investigated, showing that adopting an ITO/ZnO seed layer structure can achieve higher electrical output. The proposed ZnO nanowires-based PENG structure provides a flexible and cost-effective solution for supplying portable electronics.
Article
Engineering, Electrical & Electronic
Junwu Kan, Yaqi Wu, Shengjie Li, Shuyun Wang, Zhonghua Zhang
Summary: This paper presents a tunable rotational energy harvester that utilizes magnetic interaction force to enhance robustness and environmental adaptability. The harvester has the simultaneous functionality of frequency tuning and amplitude limiting. An analytical model is established and simulated to analyze the influence of structural parameters on output characteristics. Experimental results verify the feasibility of the proposed harvester, which demonstrates multiple effective rotational speeds and adjustable resonant frequency to adapt to different rotational speed ranges. The maximum power of 9.95 mW is achieved with a matched load resistance of 200 kΩ.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Multidisciplinary
Haoyu Zheng, Huazhang Zhang, Pin Wen, Daping He
Summary: This paper introduces a novel electrode material, graphene macro-films (GAMF), for improving the electrical output performance of the flexible piezoelectric energy harvester (f-PEH). The theoretical analysis and experimental results show that the f-PEH with GAMF having a greater negative Poisson's ratio and a larger Young's modulus exhibits better electrical output performance. The feasibility of the optimized sample in practical application is verified through load characteristic tests and stability tests.
Article
Thermodynamics
Khawla Jeder, Ayda Bouhamed, Hanen Nouri, Najmeddine Abdelmoula, Nathanael Joehrmann, Bernhard Wunderle, Hamadi Khemakhem, Olfa Kanoun
Summary: This study successfully synthesized lead-free piezoceramics and prepared three flexible nanocomposites using the solution-casting technique. The addition of Ca2+ and Zr4+ improved the material properties and enhanced the piezoelectric performance. The nanogenerator with 10 wt% BCZT powders achieved optimal performance.
Article
Chemistry, Analytical
Oleg Gaidai, Yu Cao, Yihan Xing, Junlei Wang
Summary: This study focuses on the bivariate statistics of the dynamic response of a piezoelectric galloping energy harvester under realistic environmental conditions. A novel general-purpose reliability approach is proposed, which can be applied to various dynamic systems, including micro-machines. The statistical analysis presented in this study can be used at the design stage to ensure the system's safety and reliability.
Article
Chemistry, Physical
Kunming Shi, Bin Chai, Haiyang Zou, Peiyue Shen, Bin Sun, Pingkai Jiang, Zhiwen Shi, Xingyi Huang
Summary: This study presents a novel approach of interface tailoring to enhance the dispersion and output performance of piezoelectric reinforcing phase in nanocomposites, which shows great potential for applications in nanogenerators.
Article
Green & Sustainable Science & Technology
Gang Yu, Lipeng He, Jianwen Zhou, Lei Liu, Bangcheng Zhang, Guangming Cheng
Summary: A novel mirror-image rotating piezoelectric energy harvester with multiple resonant frequencies was proposed, broadening the bandwidth and establishing a mathematical model. Experimental results show that under certain parameters, the device has high power generation efficiency, and can quickly power other devices.
Article
Chemistry, Physical
Aadil Waseem, Muhammad Ali Johar, Mostafa Afifi Hassan, Indrajit Bagal, Jun-Seok Ha, June Key Lee, Sang-Wan Ryu
Summary: Flexible and stable piezoelectric energy harvesters were successfully fabricated using polydimethylsiloxane-embedded m-axis GaN/Al2O3 core-shell nanowires transferred to indium-deposited flexible substrates. Optimizing the piezoelectric performance by controlling the Al2O3 shell thickness showed that a 6 nm thickness exhibited the maximum performance, with performance decreasing when the thickness was increased or decreased. The PEHs were effective in harvesting mechanical energy, even from static strain, and also demonstrated energy supply capabilities for operating a light emitting diode.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Ayda Bouhamed, Nathanael Joehrmann, Slim Naifar, Benny Boehm, Olav Hellwig, Bernhard Wunderle, Olfa Kanoun
Summary: Flexible nanogenerators based on lead-free barium titanate and a polydimethylsiloxane polymer have been developed, and a comparative study has shown that multiwalled carbon nanotubes can enhance their performance.
Article
Nanoscience & Nanotechnology
Dong Yeol Hyeon, Chaeyoung Nam, Seong Su Ham, Geon-Tae Hwang, Seonghoon Yi, Kyung Tae Kim, Kwi-Il Park
Summary: The study introduces a MME generator based on a magnetostrictive metallic substrate and piezoelectric polymer that converts ambient stray magnetic fields into electricity. Experimental results show that the fabricated MME generator has a high magnetoelectric voltage coefficient and performance, providing a future direction for magnetoelectric energy harvesting.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Seong-Tae Kim, Jong Min Park, Kwi-Il Park, Sang-Eun Chun, Ho Seong Lee, Pyuck-Pa Choi, Seonghoon Yi
Summary: In this study, composites were prepared by adding carbon materials with different pore size distributions into commercial Bi0.5Sb1.5Te3 thermoelectric material, resulting in improved thermoelectric properties. The composites effectively decreased thermal conductivity and increased the figure of merit, leading to significantly enhanced output power, offering a new approach for performance optimization of commercial thermoelectric materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Seoha Kim, Dong Yeol Hyeon, Seong Su Ham, Jimin Youn, Ho Seong Lee, Seonghoon Yi, Kyung Tae Kim, Kwi-Il Park
Summary: The flexible thermoelectric-piezoelectric generator (f-TPEG) is a leading candidate for longterm biomedical monitoring-based ubiquitous healthcare services. By optimizing the surficial properties of its components, it has demonstrated efficient energy generation through temperature differences and has shown promising biological energy harvesting capabilities.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Hee-Seung Ma, Min-Ku Lee, Byung-Hoon Kim, Kyu-Hyun Park, Jin-Ju Park, Sang-Hyeop Lee, Yun-Gi Jeong, Kwi-Il Park, Chang Kyu Jeong, Gyoung-Ja Lee
Summary: The study focused on the thermal stability characteristics of (K,Na,Li)NbO3 ceramics, particularly examining the impact of oxygen vacancy defects and the role of controlled Mn doping. Results showed that low levels of Mn doping could enhance ferroelectric/piezoelectric activity and thermal aging resistance by reducing intrinsic oxygen vacancy defects, but excessive doping levels could deteriorate piezoelectric thermal stability due to the combination of defect dipoles with extrinsic oxygen vacancies.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Dong Yeol Hyeon, Gyoung-Ja Lee, Sang-Hyeop Lee, Jin-Ju Park, Seoha Kim, Min-Ku Lee, Kwi-Il Park
Summary: This study reports high-temperature and flexible composite-based piezoelectric energy harvesters, which achieve high-performance energy harvesting by using ceramic particles with different compositions and a polyimide matrix material. The measurement results show that the piezoelectric energy harvester with 0.0025BS-doped ceramic particles exhibits better electrical outputs over all temperature ranges. The theoretical and quantitative analysis also confirms the superiority of 0.0025BS in fabricating high-temperature piezoelectric energy harvesters.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Seonhwa Park, Hyunsu Choi, Geon-Tae Hwang, Mahesh Peddigari, Cheol-Woo Ahn, Byung-Dong Hahn, Woon-Ha Yoon, Jung Woo Lee, Kwi-Il Park, Jongmoon Jang, Jong-Jin Choi, Yuho Min
Summary: In this study, transparent and uniform Li, Ba-doped (K,Na)NbO3 (KNN) single-crystal microcuboids were successfully prepared using a facile molten-salt synthetic strategy. By controlling the degree of supersaturation, different growth modes were found and the single crystal microcuboids were synthesized via island-like oriented attachment of KNN particles onto the growing surface. The single-crystal microcuboids exhibited distinct relaxor ferroelectric (RFE) properties, achieved through dislocation-induced nanodomain formation during their growth process.
Article
Chemistry, Multidisciplinary
Sung Cheol Park, Chaeyoung Nam, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Kwi-Il Park
Summary: In this study, high-efficiency ultra-flexible piezoelectric energy harvesters (f-PEHs) were developed using electrospun piezoelectric composite fiber (PCF) membranes. These f-PEHs showed higher output voltage and power compared to previous PCF-based energy harvesters. Additionally, a successful application in monitoring small bio-signals was achieved using an ultra-flexible f-PEH system. This study provides suggestions for wearable and biomedical self-powered electronics using piezoelectric energy-harvesting systems.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Poornaprakash Bathalavaram, Peddathimula Puneetha, Singiri Ramu, Jooyoung Jeon, Min-Woo Kwon, Dong-Yeon Lee, Siva Pratap Reddy Mallem, Young Lae Kim, Kwi-Il Park
Summary: This study presents the synthesis of diluted magnetic semiconducting ZnO:V nanorods and investigates their hydrogen evolution properties. It is found that the incorporation of V ions enhances the paramagnetic nature of ZnO, leading to improved H2 production capability. The ZnO:V (2 at%) nanorods show the best performance in terms of H2 generation.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Review
Chemistry, Analytical
Srinivas Pattipaka, Young Min Bae, Chang Kyu Jeong, Kwi-Il Park, Geon-Tae Hwang
Summary: This paper describes the progress of piezoelectric perovskite material-based flexible energy harvesters for self-powered IoT devices for biomedical/wearable electronics over the last decade.
Article
Chemistry, Physical
Chaeyoung Nam, Yujin Na, Sung Cheol Park, Hyunseung Kim, Chang Kyu Jeong, Geon-Tae Hwang, Kwi-Il Park
Summary: In response to the demand for wearable devices, a flexible magnetoelectric composite based on a 2-2 structure was developed for wearable magnetic devices. By conducting simulations and theoretical analysis, it was found that higher concentrations of CFO could generate higher magnetoelectric signals. This study provides a new avenue for wearable magnetoelectric energy harvesting.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hyunseok Song, Jongmoon Jang, Mahesh Peddigari, Srinivas Pattipaka, Yuho Min, Kwi-Il Park, Chang Kyu Jeong, Han Eol Lee, Jung Hwan Park, Ho-Yong Lee, Woon-Ha Yoon, Jungho Ryu, Geon-Tae Hwang
Summary: In this study, Pb(Mg1/3Nb2/3)O-3-Pb(Zr,Ti)O-3 (PMN-PZT) single crystals doped with hardener Mn were used to develop a high-output magneto-mechano-electric (MME) generator. By doping with 0 to 0.8 mol% hardener Mn, the dielectric constant and dielectric loss of the PMN-PZT crystal gradually decreased. The Mn-modified MME device achieved an improved magnetoelectric coefficient of 783.09 V per cm center dot Oe and a root mean square output power of 3.3 mW when an alternating current magnetic field of 8 Oe was applied, which is 1.8 times higher than that of the MME generator without Mn-doping.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Seoha Kim, Dong Yeol Hyeon, Donghun Lee, Jun Ho Bae, Kwi-Il Park
Summary: A fully flexible single film-based thermoelectric and piezoelectric hybrid generator (TPHG) was proposed and assembled through simple drop-casting and gravitational settling effect. The device generated outputs of 1 μA and 4 V at a temperature difference of 3 K and a bending displacement of 5 mm, and exhibited robust mechanical durability for approximately 5000 bending cycles. This design concept contributes to the development of high-performance multisource energy harvesting devices for wearable sensors.
MATERIALS TODAY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Giulio Fatti, Hyunseung Kim, Changwan Sohn, Minah Park, Yeong-won Lim, Zhuohan Li, Kwi-Il Park, Izabela Szlufarska, Hyunseok Ko, Chang Kyu Jeong, Sung Beom Cho
Summary: This article proposes a model based on mechanochemistry to explain the fundamental properties of triboelectrification. By studying the contact between gold and silicate glasses, it is observed that the triboelectric output varies greatly and experiences polarity inversions. The model suggests that electronic transfer is activated by mechanochemistry and the terminations exposed to contact determine the tribopolarity. It provides a unified framework to explain experimental observations and can be used to predict the triboelectric properties.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Srinivas Pattipaka, Hyunsu Choi, Yeseul Lim, Kwi-Il Park, Kyeongwoon Chung, Geon-Tae Hwang
Summary: The electric energy storage properties of relaxor ferroelectric ceramics (BNKT-BST) are enhanced via a domain engineering method. The incorporation of BST into BNKT disrupts ferroelectric order, induces the formation of highly dynamic polar nano-regions, and improves the breakdown strength. The ceramics exhibit high recoverable energy density and energy efficiency.
Article
Nanoscience & Nanotechnology
Giulio Fatti, Alessandra Ciniero, Hyunseok Ko, Han Uk Lee, Yujin Na, Chang Kyu Jeong, Sang-Geul Lee, Dongyub Kwak, Kwi-Il Park, Sung Beom Cho, Daniele Dini
Summary: The lack of theoretical understanding of triboelectrification has hindered the development of energy harvesting technologies like triboelectric nanogenerators. A model predictive of the triboelectric behavior of polytetrafluoroethylene is formulated, driving the development of improved nanogenerators. By using a combined computational-experimental approach, it is shown that defluorination enhances the triboelectric charging of polytetrafluoroethylene at the nanoscale, leading to a one-order-of-magnitude output increase in triboelectric nanogenerators.
ADVANCED ELECTRONIC MATERIALS
(2023)