- Investigation of the Thermal-to-Electrical Properties of Transition Metal-Sb Alloys Synthesized for Thermoelectric Applications
-
Jong Min Park, Seungki Jo, Sooho Jung, Jinhee Bae, Linh Ba Vu, Kwi-Il Park, Kyung Tae Kim
-
J Powder Mater. 2024;31(3):236-242. Published online June 27, 2024
-
DOI: https://doi.org/10.4150/jpm.2024.00031
-
-
541
View
-
33
Download
-
1
Citations
-
 Abstract
 PDF
- The development of thermoelectric (TE) materials to replace Bi2Te3 alloys is emerging as a hot issue with the potential for wider practical applications. In particular, layered Zintl-phase materials, which can appropriately control carrier and phonon transport behaviors, are being considered as promising candidates. However, limited data have been reported on the thermoelectric properties of metal-Sb materials that can be transformed into layered materials through the insertion of cations. In this study, we synthesized FeSb and MnSb, which are used as base materials for advanced thermoelectric materials. They were confirmed as single-phase materials by analyzing X-ray diffraction patterns. Based on electrical conductivity, the Seebeck coefficient, and thermal conductivity of both materials characterized as a function of temperature, the zT values of MnSb and FeSb were calculated to be 0.00119 and 0.00026, respectively. These properties provide a fundamental data for developing layered Zintl-phase materials with alkali/alkaline earth metal insertions.
-
Citations
Citations to this article as recorded by  - Improving thermoelectric properties of CuMnSb alloys via strategic alloying with magnetic MnSb and Cu
Jong Min Park, Seungki Jo, Soo-ho Jung, Jinhee Bae, Linh Ba Vu, Jihun Yu, Kyung Tae Kim
Materials Letters.2025; 381: 137796. CrossRef
- Development of Composite-film-based Flexible Energy Harvester using Lead-free BCTZ Piezoelectric Nanomaterials
-
Gwang Hyeon Kim, Hyeon Jun Park, Bitna Bae, Haksu Jang, Cheol Min Kim, Donghun Lee, Kwi-Il Park
-
J Powder Mater. 2024;31(1):16-22. Published online February 28, 2024
-
DOI: https://doi.org/10.4150/KPMI.2024.31.1.16
-
-
461
View
-
21
Download
-
5
Citations
-
Abstract
PDF
- Composite-based piezoelectric devices are extensively studied to develop sustainable power supply and selfpowered devices owing to their excellent mechanical durability and output performance. In this study, we design a leadfree piezoelectric nanocomposite utilizing (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 (BCTZ) nanomaterials for realizing highly flexible energy harvesters. To improve the output performance of the devices, we incorporate porous BCTZ nanowires (NWs) into the nanoparticle (NP)-based piezoelectric nanocomposite. BCTZ NPs and NWs are synthesized through the solidstate reaction and sol-gel-based electrospinning, respectively; subsequently, they are dispersed inside a polyimide matrix. The output performance of the energy harvesters is measured using an optimized measurement system during repetitive mechanical deformation by varying the composition of the NPs and NWs. A nanocomposite-based energy harvester with 4:1 weight ratio generates the maximum open-circuit voltage and short-circuit current of 0.83 V and 0.28 A, respectively. In this study, self-powered devices are constructed with enhanced output performance by using piezoelectric energy harvesting for application in flexible and wearable devices.
-
Citations
Citations to this article as recorded by - Flexible hybrid thermoelectric films made of bismuth telluride-PEDOT:PSS composites enabled by freezing-thawing process and simple chemical treatment
Cheol Min Kim, Seoha Kim, Nagamalleswara Rao Alluri, Bitna Bae, Momanyi Amos Okirigiti, Gwang Hyun Kim, Hyeon Jun Park, Haksu Jang, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Kwi-Il Park
Materials Today Chemistry.2025; 44: 102532. CrossRef - Flexible Thermoelectric Energy Harvester with Stacked Structure of Thermoelectric Composite Films Made of PVDF and Bi2Te3-Based Particles
Da Eun Shin, Nagamalleswara Rao Alluri, Kwi-Il Park
ACS Applied Energy Materials.2024; 7(19): 8288. CrossRef - Enhanced energy harvesting of fibrous composite membranes via plasma-piezopolymer interaction
Hyeon Jun Park, Bitna Bae, HakSu Jang, Dong Yeol Hyeon, Dong Hun Lee, Gwang Hyun Kim, Cheol Min Kim, Nagamalleswara Rao Alluri, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Kwi-Il Park
Nano Energy.2024; 131: 110299. CrossRef - CoFe2O4-BaTiO3 core-shell-embedded flexible polymer composite as an efficient magnetoelectric energy harvester
Bitna Bae, Nagamalleswara Rao Alluri, Cheol Min Kim, Jungho Ryu, Gwang Hyeon Kim, Hyeon Jun Park, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Geon-Tae Hwang, Kwi-Il Park
Materials Today Physics.2024; 48: 101567. CrossRef - Long‐Lasting, Steady and Enhanced Energy Harvesting by Inserting a Conductive Layer into the Piezoelectric Polymer
HakSu Jang, Gwang Hyeon Kim, Dong Won Jeon, Hyeon Jun Park, BitNa Bae, Nagamalleswara Rao Alluri, Cheol Min Kim, Changyeon Baek, Min‐Ku Lee, Sung Beom Cho, Gyoung‐Ja Lee, Kwi‐Il Park
Advanced Functional Materials.2024;[Epub] CrossRef
- Fabrication of Flexible Energy Harvester Based on BaTiO3 Piezoelectric Nanotube Arrays
-
Seo Young Yoon, Cheol Min Kim, Bitna Bae, Yujin Na, Haksu Jang, Kwi-Il Park
-
J Powder Mater. 2023;30(6):521-527. Published online December 1, 2023
-
DOI: https://doi.org/10.4150/KPMI.2023.30.6.521
-
-
281
View
-
11
Download
-
2
Citations
-
Abstract
PDF
Piezoelectric technology, which converts mechanical energy into electrical energy, has recently attracted drawn considerable attention in the industry. Among the many kinds of piezoelectric materials, BaTiO3 nanotube arrays, which have outstanding uniformity and anisotropic orientation compared to nanowire-based arrays, can be fabricated using a simple synthesis process. In this study, we developed a flexible piezoelectric energy harvester (f-PEH) based on a composite film with PVDF-coated BaTiO3 nanotube arrays through sequential anodization and hydrothermal synthesis processes. The f-PEH fabricated using the piezoelectric composite film exhibited excellent piezoelectric performance and high flexibility compared to the previously reported BaTiO3 nanotube array-based energy harvester. These results demonstrate the possibility for widely application with high performance by our advanced f-PEH technique based on BaTiO3 nanotube arrays. -
Citations
Citations to this article as recorded by - Flexible Thermoelectric Energy Harvester with Stacked Structure of Thermoelectric Composite Films Made of PVDF and Bi2Te3-Based Particles
Da Eun Shin, Nagamalleswara Rao Alluri, Kwi-Il Park
ACS Applied Energy Materials.2024; 7(19): 8288. CrossRef - CoFe2O4-BaTiO3 core-shell-embedded flexible polymer composite as an efficient magnetoelectric energy harvester
Bitna Bae, Nagamalleswara Rao Alluri, Cheol Min Kim, Jungho Ryu, Gwang Hyeon Kim, Hyeon Jun Park, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Geon-Tae Hwang, Kwi-Il Park
Materials Today Physics.2024; 48: 101567. CrossRef
- Effect of Hydrothermal Reaction Conditions on Piezoelectric Output Performance of One Dimensional BaTiO3 Nanotube Arrays
-
Jae Hoon Lee, Dong Yeol Hyeon, Dong Hun Heo, Kwi-Il Park
-
J Korean Powder Metall Inst. 2021;28(2):127-133. Published online April 1, 2021
-
DOI: https://doi.org/10.4150/KPMI.2021.28.2.127
-
-
231
View
-
3
Download
-
1
Citations
-
Abstract
PDF
One-dimensional (1D) piezoelectric nanostructures are attractive candidates for energy generation because of their excellent piezoelectric properties attributed to their high aspect ratios and large surface areas. Vertically grown BaTiO3 nanotube (NT) arrays on conducting substrates are intensively studied because they can be easily synthesized with excellent uniformity and anisotropic orientation. In this study, we demonstrate the synthesis of 1D BaTiO3 NT arrays on a conductive Ti substrate by electrochemical anodization and sequential hydrothermal reactions. Subsequently, we explore the effect of hydrothermal reaction conditions on the piezoelectric energy conversion efficiency of the BaTiO3 NT arrays. Vertically aligned TiO2 NT arrays, which act as the initial template, are converted into BaTiO3 NT arrays using hydrothermal reaction with various concentrations of the Ba source and reaction times. To validate the electrical output performance of the BaTiO3 NT arrays, we measure the electricity generated from each NT array packaged with a conductive metal foil and epoxy under mechanical pushings. The generated output voltage signals from the BaTiO3 NT arrays increase with increasing concentration of the Ba source and reaction time. These results provide a new strategy for fabricating advanced 1D piezoelectric nanostructures by demonstrating the correlation between hydrothermal reaction conditions and piezoelectric output performance. -
Citations
Citations to this article as recorded by - Fabrication of Flexible Energy Harvester Based on BaTiO3 Piezoelectric Nanotube Arrays
Seo Young Yoon, Cheol Min Kim, Bitna Bae, Yujin Na, Haksu Jang, Kwi-Il Park
journal of Korean Powder Metallurgy Institute.2023; 30(6): 521. CrossRef
- A Comparison Study of Output Performance of Organic-Inorganic Piezoelectric Nanocomposite Made of Piezoelectric/Non-piezoelectric Polymers and BaTiO3 Nanoparticles
-
Dong Yeol Hyeon, Kwi-Il Park
-
J Korean Powder Metall Inst. 2019;26(2):119-125. Published online April 1, 2019
-
DOI: https://doi.org/10.4150/KPMI.2019.26.2.119
-
-
225
View
-
1
Download
-
5
Citations
-
Abstract
PDF
Piezoelectric energy harvesting technology is attracting attention, as it can be used to convert more accessible mechanical energy resources to periodic electricity. Recent developments in the field of piezoelectric energy harvesters (PEHs) are associated with nanocomposites made from inorganic piezoelectric nanomaterials and organic elastomers. Here, we used the BaTiO3 nanoparticles and piezoelectric poly(vinylidene fluoride) (PVDF) polymeric matrix to fabricate the nanocomposites-based PEH to improve the output performance of PEHs. The piezoelectric nanocomposite is produced by dispersing the inorganic piezo-ceramic nanoparticles inside an organic piezo-polymer and subsequently spin-coat it onto a metal plate. The fabricated organic-inorganic piezoelectric nanocomposite-based PEH harvested the output voltage of ~1.5 V and current signals of ~90 nA under repeated mechanical pushings: these values are compared to those of energy devices made from non-piezoelectric polydimethylsiloxane (PDMS) elastomers and supported by a multiphysics simulation software. -
Citations
Citations to this article as recorded by - Development and Characterization of Hafnium-Doped BaTiO3 Nanoparticle-Based Flexible Piezoelectric Devices
HakSu Jang, Hyeon Jun Park, Gwang Hyeon Kim, Gyoung-Ja Lee, Jae-Hoon Ji, Donghun Lee, Young Hwa Jung, Min-Ku Lee, Changyeon Baek, Kwi-Il Park
JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY.2024; 33(1): 34. CrossRef - Enhanced energy harvesting of fibrous composite membranes via plasma-piezopolymer interaction
Hyeon Jun Park, Bitna Bae, HakSu Jang, Dong Yeol Hyeon, Dong Hun Lee, Gwang Hyun Kim, Cheol Min Kim, Nagamalleswara Rao Alluri, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Kwi-Il Park
Nano Energy.2024; 131: 110299. CrossRef - Effects of Mixing Ratio and Poling on Output Characteristics of BaTiO3-Poly Vinylidene Fluoride Composite Piezoelectric Generators
Hee-Tae Kim, Sang-Shik Park
Korean Journal of Materials Research.2023; 33(12): 517. CrossRef - Stretchable Sensor Array Based on Lead-Free Piezoelectric Composites Made of BaTiO3 Nanoparticles and Polymeric Matrix
Jun Ho Bae, Seong Su Ham, Sung Cheol Park, Kwi-Il Park
JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY.2022; 31(5): 312. CrossRef - Flexible Energy Harvester Made of Organic-Inorganic Hybrid Piezoelectric Nanocomposite
Yu Jeong Kwon, Dong Yeol Hyeon, Kwi-Il Park
Korean Journal of Materials Research.2019; 29(6): 371. CrossRef
- Recent Progress in Flexible Energy Harvesting Devices based on Piezoelectric Nanomaterials
-
Kwi-Il Park
-
J Korean Powder Metall Inst. 2018;25(3):263-272. Published online June 1, 2018
-
DOI: https://doi.org/10.4150/KPMI.2018.25.3.263
-
-
284
View
-
0
Download
-
5
Citations
-
Abstract
PDF
Recent developments in the field of energy harvesting technology that convert ambient energy resources into electricity enable the use of self-powered energy systems in wearable and portable electronic devices without the need for additional external power sources. In particular, piezoelectric-effect-based flexible energy harvesters have drawn much attention because they can guarantee power generation from ubiquitous mechanical and vibrational movements. In response to demand for sustainable, permanent, and remote use of real-life personal electronics, many research groups have investigated flexible piezoelectric energy harvesters (f-PEHs) that employ nanoscaled piezoelectric materials such as nanowires, nanoparticles, nanofibers, and nanotubes. In those attempts, they have proven the feasibility of energy harvesting from tiny periodic mechanical deformations and energy utilization of f-PEH in commercial electronic devices. This review paper provides a brief overview of f-PEH devices based on piezoelectric nanomaterials and summarizes the development history, output performance, and applications. -
Citations
Citations to this article as recorded by - Development and Characterization of Hafnium-Doped BaTiO3 Nanoparticle-Based Flexible Piezoelectric Devices
HakSu Jang, Hyeon Jun Park, Gwang Hyeon Kim, Gyoung-Ja Lee, Jae-Hoon Ji, Donghun Lee, Young Hwa Jung, Min-Ku Lee, Changyeon Baek, Kwi-Il Park
JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY.2024; 33(1): 34. CrossRef - Enhanced Piezoelectric Performance of Composite Fibers Based on Lead-Free BCTZ Ceramics and P(VDF-TrFE) Piezopolymer for Self-Powered Wearable Sensors
Sung Cheol Park, Chaeyoung Nam, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Kwi-Il Park
ACS Sustainable Chemistry & Engineering.2022; 10(43): 14370. CrossRef - A Comparison Study of Output Performance of Organic-Inorganic Piezoelectric Nanocomposite Made of Piezoelectric/Non-piezoelectric Polymers and BaTiO3 Nanoparticles
Dong Yeol Hyeon, Kwi-Il Park
Journal of Korean Powder Metallurgy Institute.2019; 26(2): 119. CrossRef - Piezoelectric Flexible Energy Harvester Based on BaTiO3 Thin Film Enabled by Exfoliating the Mica Substrate
Dong Yeol Hyeon, Kwi-Il Park
Energy Technology.2019;[Epub] CrossRef - Piezoelectric Energy Harvesting from Two-Dimensional Boron Nitride Nanoflakes
Gyoung-Ja Lee, Min-Ku Lee, Jin-Ju Park, Dong Yeol Hyeon, Chang Kyu Jeong, Kwi-Il Park
ACS Applied Materials & Interfaces.2019; 11(41): 37920. CrossRef
- Recent Advances in Thermoelectric Materials and Devices: Improving Power Generation Performance
-
Momanyi Amos Okirigiti, Cheol Min Kim, Hyejeong Choi, Nagamalleswara Rao Alluri, Kwi-Il Park
-
Received November 15, 2024 Accepted December 6, 2024 Published online December 16, 2024
-
DOI: https://doi.org/10.4150/jpm.2024.00395
-
-
Abstract
- Thermoelectric materials have been the focus of extensive research interest in recent years due to their potential in clean power generation from waste heat. Their conversion efficiency is primarily reflected by the dimensionless figure of merit, with higher values indicating better performance. There is a pressing need to discover materials that increase output power and improve performance, from the material level to device fabrication. This review provides a comprehensive analysis of recent advancements, such as Bi2Te3-based nanostructures that reduce thermal conductivity while maintaining electrical conductivity, GeTe-based high entropy alloys that utilize multiple elements for improved thermoelectric properties, porous metal-organic frameworks offering tunable structures, and organic/hybrid films that present low-cost, flexible solutions. Innovations in thermoelectric generator designs, such as asymmetrical geometries, segmented modules, and flexible devices, have further contributed to increased efficiency and output power. Together, these developments are paving the way for more effective thermoelectric technologies in sustainable energy generation.
- Flexible Hybrid Energy Harvester based on Thermoelectric Composite Film and Electrospun Piezopolymer Membranes
-
Hyomin Jeon, Cheol Min Kim, Hyeon Jun Park, Bitna Bae, Hyejeong Choi, HakSu Jang, Kwi-Il Park
-
Received November 29, 2024 Accepted December 30, 2024 Published online February 12, 2025
-
DOI: https://doi.org/10.4150/jpm.2024.00458
-
-
Abstract
- A hybrid energy harvester that consisted of thermoelectric (TE) composite film and electrospun piezoelectric (PE) polymeric membranes was constructed. TE composites were fabricated by dispersing inorganic TE powders inside polyvinylidene fluoride elastomer using a drop-casting technique. The polyvinylidene fluoride-trifluoroethylene, which was chosen due to its excellent chemical resistance, mechanical stability, and biocompatibility, was electrospun onto an aluminum foil to fabricate the ultra-flexible PE membranes. To create a hybrid energy harvester that can simultaneously convert heat and mechanical energy resources into electricity, the TE composite films attached to the PE membrane were encapsulated with protective polydimethylsiloxane. The fabricated energy harvester converted the outputs with a maximum voltage of 4 V (PE performance) and current signals of 0.2 μA (TE performance) under periodical heat input and mechanical bending in hybrid modes. This study demonstrates the potential of the hybrid energy harvester for powering flexible and wearable electronics, offering a sustainable and reliable power source.
|
kpmi
