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Advances in Hybrid Energy Harvesting: Materials, Structures and Applications
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Advances in Hybrid Energy Harvesting: Materials, Structures and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".

Deadline for manuscript submissions: 20 April 2025 | Viewed by 1755

Special Issue Editors

Dr. Zacharias A. Viskadourakis

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Guest Editor
Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), N. Plastira 100, GR-70013 Heraklion, Greece
Interests: metamaterials; energy harvesting; magnetism; superconductivity; strongly correlated systems; 3D printing; thin films; ferroelectrics; multiferroics
Special Issues, Collections and Topics in MDPI journals
Dr. George Kenanakis

E-Mail Website
Guest Editor
Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 70013 Heraklion, Greece
Interests: 3D printing; nanocomposites; metamaterials; energy harvesting; photocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Hybrid energy harvesting can be defined as a procedure in which wasted ambient energy from various sources, such as light, heat, movement, vibration, or electromagnetic signals, is captured and converted to electric energy through transduction mechanisms such as photovoltaic, thermoelectric, pyroelectric, piezoelectric, and electromagnetic. Compared to conventional energy-harvesting  devices, hybrid systems possess a significant advantage in that they can produce energy continuously, regardless of the environmental conditions. For example, a hybrid harvester consisting of a photovoltaic panel and a thermoelectric generator (TEG) can produce electric power during the day, mainly due to solar energy conversion. However, at night, TEGs continue to provide energy, taking advantage of temperature differences. Therefore, hybrid energy harvesters continuously provide stable, constant energy.  As such, hybrid energy-harvesting systems could represent promising alternatives, especially for replacing batteries in low-power electronic devices and wearables, making them an important technology for achieving a sustainable society in the future.

Considering the above, the main purpose of the proposed Special Issue is to carry out an in-depth exploration of hybrid energy-harvesting technology, especially regarding the materials used. Moreover, we aim to highlight recent progress and prospects in this exciting and evolving field of science.

Potential topics for this Special Issue include (but are not limited to) the following:

  1. Novel materials for ambient energy harvesting (thermoelectrics, piezoelectrics, pyroelectrics, metamaterials, etc.);
  2. Hybrid energy-harvesting devices;
  3. Additive manufacturing in hybrid energy-harvesting systems;
  4. Applications of hybrid energy-harvesting devices;
  5. Design of energy harvesters;
  6. Energy management for harvesting devices.

We look forward to receiving submissions of scientific impact that address and overcome the challenges in this field.

Dr. Zacharias A. Viskadourakis
Dr. George Kenanakis
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hybrid energy harvesting
  • materials for energy harvesting
  • combine harvesters
  • harvester design
  • energy management

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Published Papers (2 papers)

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Research

12 pages, 5879 KiB  
Article
Advanced Thermoelectric Performance of SWCNT Films by Mixing Two Types of SWCNTs with Different Structural and Thermoelectric Properties
by Yutaro Okano, Hisatoshi Yamamoto, Koki Hoshino, Shugo Miyake and Masayuki Takashiri
Materials 2025, 18(1), 188; https://doi.org/10.3390/ma18010188 - 4 Jan 2025
Viewed by 568
Abstract
Semiconducting single-walled carbon nanotubes (SWCNTs) are significantly attractive for thermoelectric generators (TEGs), which convert thermal energy into electricity via the Seebeck effect. This is because the characteristics of semiconducting SWCNTs are perfectly suited for TEGs as self-contained power sources for sensors on the [...] Read more.
Semiconducting single-walled carbon nanotubes (SWCNTs) are significantly attractive for thermoelectric generators (TEGs), which convert thermal energy into electricity via the Seebeck effect. This is because the characteristics of semiconducting SWCNTs are perfectly suited for TEGs as self-contained power sources for sensors on the Internet of Things (IoT). However, the thermoelectric performances of the SWCNTs should be further improved by using the power sources. The ideal SWCNTs have a high electrical conductivity and Seebeck coefficient while having a low thermal conductivity, but it is challenging to balance everything. In this study, to improve the thermoelectric performance, we combined two types of SWCNTs: one with a high electrical conductivity (Tuball 01RW03, OCSiAl) and the other with a high Seebeck coefficient and low thermal conductivity (ZEONANO SG101, ZEON). The SWCNT inks were prepared by mixing two types of SWCNTs using ultrasonic dispersion while varying the mixing ratios, and p-type SWCNT films were prepared using vacuum filtration. The highest dimensionless figure-of-merit of 1.1 × 10−3 was exhibited at approximately 300 K when the SWCNT film contained the SWCNT 75% of SWCNT (ZEONANO SG101) and 25% of SWCNT (Tuball 01RW03). This simple process will contribute to the prevalent use of SWCNT-TEG as a power source for IoT sensors. Full article
(This article belongs to the Special Issue Advances in Hybrid Energy Harvesting: Materials, Structures and Applications)
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19 pages, 3021 KiB  
Article
Hybrid Microwave/Solar Energy Harvesting System Using 3D-Printed Metasurfaces
by Argyri Drymiskianaki, Zacharias Viskadourakis and George Kenanakis
Materials 2024, 17(23), 5969; https://doi.org/10.3390/ma17235969 - 5 Dec 2024
Viewed by 746
Abstract
In this study, a hybrid energy harvesting system based on a conventional solar cell combined with 3D-printed metasurface units is studied. Millimeter-scale metasurface units were fabricated via the stereolithography technique, and then they were covered with conductive silver paint, in order to achieve [...] Read more.
In this study, a hybrid energy harvesting system based on a conventional solar cell combined with 3D-printed metasurface units is studied. Millimeter-scale metasurface units were fabricated via the stereolithography technique, and then they were covered with conductive silver paint, in order to achieve high electric conductivity. The performance of single, as well as two-unit metasurface harvesters, was thoroughly investigated. It was found that both of them produced voltage, which peaks at their resonance frequency, demonstrating efficient energy harvesting behavior in the microwave regime. Then, the metasurface units were connected with a commercially available photovoltaic panel and the performance of the hybrid system was examined under different environmental conditions, modifying the light intensity (i.e., light, dark and shadow). It was shown that the proposed hybrid harvesting system produces a sizable voltage output, which persists, even in the case when one of the components does not contribute. Furthermore, the performance of the hybrid harvester is found to be adequate enough, although optimization of the harvesting circuit is required in order to achieve high efficiency levels. All in all, the presented experimental evidence clearly indicates the realization of a rather promising hybrid energy harvesting system, exploiting two distinct ambient energy sources, namely light and microwaves. Full article
(This article belongs to the Special Issue Advances in Hybrid Energy Harvesting: Materials, Structures and Applications)
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