Copyright © 2022 Foshan MBRT Nanofiberlabs Technology Co., Ltd All rights reserved.Site Map
Recently, Guangzu Zhang from Huazhong University of Science and Technology and Rujun Ma from Nankai University published an article entitled “Electronic cooling and energy harvesting using ferroelectric polymer composites” in the journal Nature Communications. composites” in the journal Nature Communications. The study reports that ferroelectric polymer composites consisting of highly polarized barium strontium titanate Electrospun Nanofbers and electron-accepting [6,6]phenyl-C61 -butanoic acid methyl ester maintain fast electrothermal response and stable cycling at high temperatures.
It is shown that this composite not only effectively cools electronic devices at high temperatures, but also converts excess thermal energy into electrical energy, realizing the dual functions of cooling and energy harvesting. The composite material exhibits significant temperature changes under electric fields and has good energy density and efficiency. This discovery provides a new solution for the thermal management of next-generation electronic devices, which has a wide range of applications.
Preparation process of ferroelectric polymer composites
(1) Solution preparation: barium acetate and strontium acetate were mixed stoichiometrically and dissolved in acetic acid to form a solution with a concentration of 0.12 g/mL. Meanwhile, tetrabutyltitanium was dissolved in acetylacetone to form a solution with a concentration of 0.3 g/mL.
(2) Mixing: the above two solutions were mixed and PVP was added as the polymer matrix to form a homogeneous precursor solution.
(3) Electrospinning: Electrospun Nanofbers were prepared using an electrospinning machine.
(4) Heat treatment: the collected Electrospun Nanofbers were annealed at 800 °C to improve their crystallinity and ferroelectric properties.
(1) Polymer solution preparation: [P(VDF-TrFE-CFE)] was dissolved in DMF and stirred at ~50 °C to form a clear solution.
(2) Addition of BSTElectrospun Nanofbers: Synthesized BSTElectrospun Nanofbers were added to the polymer solution, and stirred again to ensure homogeneous dispersion. The solution is then stirred again to ensure uniform dispersion.
(3) Adding PCBM: For composites containing PCBM, dissolve PCBM with DMF and add it to the polymer-Electrospun Nanofbers mixing solution to ensure the homogeneity of the components.
(4) Film formation: The mixed solution is cast onto a glass plate and subsequently dried at 40-60 °C to form a film.
(5) Post-treatment: The dried film is peeled off from the glass and heated at 90 °C for 12 hours, followed by annealing in a vacuum oven at 105 °C for 12 hours to further improve the material properties.
1. Enhanced ECE performance:
The introduction of Barium Strontium Titanate-Strontium Titanate Electrospun Nanofbers (BST NFs) into ferroelectric polymer composites significantly improves the electrocooling effect. The composites exhibit temperature changes (ΔT) of up to 7.5 °C at relatively low electric fields (50 MV/m), and even higher ΔT values can be achieved at higher electric fields.
2. Operational stability at elevated temperatures:
It has been shown that the developed polymer composite maintains fast electrocooling response and stable cycling performance at elevated temperatures, overcoming the limitations of conventional electrocooled polymers that are typically operated below 50°C. The polymer composite has been shown to exhibit a high degree of stability at elevated temperatures.
3. Dual function:
The composite material not only serves as an effective cooling material, but also acts as a thermoelectric energy converter, capable of harvesting heat from overheated electronic components (e.g., a central processor) and converting it into electrical energy.
4. Mitigation of Joule heating:
The composite material is designed to help dampen the electrical conductivity and minimize energy loss due to Joule heating, which is critical to maintaining cooling efficiency at high electric fields and high temperatures. This is critical to maintaining cooling efficiency at high electric fields and high temperatures.
Originallink: https://doi.org/10.1038/s41467-024-51147-6
