Hybridizing Triboelectric and Thermomagnetic Effects: A Novel Low‐Grade Thermal Energy Harvesting Technology

Rodrigues, C.; Pires, Ana L.; Gonçalves, I. C.; Silva, Daniel; OIiveira, Joana; Pereira, A. M.; Ventura, J.

doi:10.1002/adfm.202110288

Cited by 20 publications

(17 citation statements)

References 49 publications

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“…However, efficiency is limited particularly at low temperature differences, as thermoelectric harvesters need a large heat sink, several times larger than the device itself to maintain a sufficiently high temperature gradient ( Bierschenk, 2009 ; Min, 2010 ; Snyder and Toberer, 2008 ). Recently, significant progress has been achieved using thermomagnetic ( Srivastava et al., 2011 ) and hybrid thermomagnetic effects ( Rodrigues et al., 2022 ). Thermomagnetic generators (TMGs) use the large abrupt change of magnetization Δ M of dedicated magnetic materials such as Heusler alloys at their critical transition temperatures in order to induce an electric current ( Ahmim et al., 2019 , 2021 ; Post et al., 2013 ; Srivastava et al., 2011 ; Ujihara et al., 2007 ; Waske et al., 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Thermal processes of miniature thermomagnetic generators in resonant self-actuation mode

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Thermal processes of miniature thermomagnetic generators in resonant self-actuation mode

et al. 2022

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“…The output voltages increase with increasing temperature because the PCOH shows heat-sensitive electronic conductivity (Figures 4i and 5h). 46 These demonstrations suggest that PCOHs have potential applications in fabricating high-performance wearable, stable, and durable electronics.…”

Section: Resultsmentioning

confidence: 99%

Protein Crystallization-Mediated Self-Strengthening of High-Performance Printable Conducting Organohydrogels

Liu

Zhang

et al. 2022

ACS Nano

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Conductive polymers have many advanced applications, but there is still an important target in developing a general and straightforward strategy for printable, mechanically stable, and durable organohydrogels with typical conducting polymers of, for example, polypyrrole, polyaniline, or poly (3,4-ethylenedioxythiophene). Here we report a protein crystallization-mediated selfstrengthening strategy to fabricate printable conducting organohydrogels with the combination of rational photochemistry design. Such organohydrogels are one-step prepared via rapidly and orthogonally controllable photopolymerizations of pyrroles and gelatin protein in tens of seconds. As-prepared conducting organohydrogels are patterned and printed to complicated structures via shadow-mask lithography and 3D extrusion technology. The mild photocatalytic system gives the transition metal carbide/nitride (MXene) component high stability during the oxidative preparation process and storage. Controlling water evaporation promotes gelatin crystallization in the as-prepared organohydrogels that significantly self-strengthens their mechanical property and stability in a broad temperature range and durability against continuous friction treatment without introducing guest functional materials. Also, these organohydrogels have commercially electromagnetic shielding, thermal conducting properties, and temperature-and light-responsibility. To further demonstrate the merits of this simple strategy and as-prepared organohydrogels, prism arrays, as proofs-of-concept, are printed and applied to make wearable triboelectric nanogenerators. This self-strengthening process and 3D-printability can greatly improve their voltage, charge, and current output performances compared to the undried and flat samples.

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confidence: 99%

Significant Role of Carbon Nanomaterials in Material Extrusion‐Based 3D‐Printed Triboelectric Nanogenerators

et al. 2023

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The convenient use of energy harvesting techniques has been a bottleneck issue in the rapid advancement of energy storage device technologies. [1] The energy harvesting approaches have witnessed several innovations in design and development in the process to attain miniaturization of devices with enhanced output efficiency. The concept of energy harvesting has its history in technological revolution with electromagnetic induction being an ideal concept in converting mechanical energy into electrical energy. [2,3] The incessant consumption of fossil fuels has led the technologists to ponder about alternate resources in energy consumption to develop distributed power supply and portable electronic devices with superior output performances. This led to the invention of triboelectric nanogenerators (TENGs) by Professor Z.L. Wang in 2012. [4] TENG is so far considered as the best option to harvest mechanical energy to consumable electrical energy for sensing and energy storage devices. TENG works on the combination of electrostatic induction and triboelectric effect. TENG enables the possibility to convert mechanical energy into electrical energy with the help of coupling effect between the electrostatic induction and contact electrification between the triboelectric materials, possessing different tendencies to gain or lose electrons. [5] This novel approach to harvest mechanical energy has the tendency to provide electricity for portable electronics and distributed power systems such as physiological monitoring, robotic systems, motion tracking, etc. The performance of TENG devices and TENG sensors has improved dramatically in the few years after its initial publication. [6][7][8] The friction effect is critical to the TENG's output performance, and altering the inner structure is the simplest and most cost-effective technique to increase the contact area without replacing the entire material. The variety of materials available for TENG production is huge, necessitating extensive study ahead of time to achieve the optimum results. [9] The proper selection of materials is vital for enhancing the triboelectric output of the TENG device. There are many techniques to fabricate triboelectric materials which include electrospinning, spin coating, etching, and 3D printing (3DP). [10] 3DP technology has emerged as a promising fabrication method for TENG development due to its fast production time, low-cost modeling, and simplicity of developing sophisticated and tailored structures with excellent material utilization efficiency. [11] The amalgamation of TENGs and 3DP has contributed to the encouragement of new-era energy harvesting technologies and self-powered sensing by making full use of their individual merits. The demerits of 3D printing (3DP) having lesser manufacturing precision than photoetching can be fulfilled by speedy layer-by-layer production of the complicated

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Hybridizing Triboelectric and Thermomagnetic Effects: A Novel Low‐Grade Thermal Energy Harvesting Technology

Cited by 20 publications

References 49 publications

Thermal processes of miniature thermomagnetic generators in resonant self-actuation mode

Thermal processes of miniature thermomagnetic generators in resonant self-actuation mode

Protein Crystallization-Mediated Self-Strengthening of High-Performance Printable Conducting Organohydrogels

Significant Role of Carbon Nanomaterials in Material Extrusion‐Based 3D‐Printed Triboelectric Nanogenerators

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