Electromagnetic-driven electrocaloric cooling device based on ternary ferroelectric composites

With the development and application of portable devices and electronic products, the problem of cooling is facing severe challenge. However, traditional compression type refrigeration technology cannot meet the current demand, and the electrocaloric (EC) cooling technology was considered as the most promising choice. In this paper, BST nanoparticles, BN nanosheets and P(VDF-TrFE-CFE) were blended to prepare a uniformly dispersed nanocomposite, which not only increased the polarization, but also improved the breakdown strength and thermal conductivity of the material effectively. Then, a EC cooling device driven by electromagnetic was manufactured. The average cooling heat flux of the EC cooling device can reach 293.14 W/m(2) under electric field of 40 MV/m at 1 Hz. The specific cooling power of the EC cooling device can reach 0.96 W/g, and the coefficient of performance (COP) is 3.6. Finally, the EC cooling device performs well in practical applications, the temperature drop can reach 12 degrees C within 20 s. Compared with the traditional fan cooling, the efficiency was improved significantly. This research achieves efficient electrocaloric cooling through the composite of ferroelectric materials, but also paves the way for the application of EC cooling technology in portable devices and electronic products.

Automated summary

This research successfully achieved efficient electrocaloric cooling through the composite of ferroelectric materials and manufactured a high-performance EC cooling device. Compared with traditional fan cooling, EC cooling showed better performance in practical applications.