Magnetic field-assisted acceleration of energy storage based on microencapsulation of phase change material with CaCO3/Fe3O4 composite shell
| Autor: | Xiaodong Wang, Xiang Wang, Tao Shi, Huan Liu, Donglin Tian |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Work (thermodynamics)
Materials science Chemical engineering Renewable Energy Sustainability and the Environment Composite number Energy conversion efficiency Magnetic refrigeration Energy Engineering and Power Technology Energy transformation Electrical and Electronic Engineering Photothermal therapy Phase-change material Energy storage |
| Zdroj: | Journal of Energy Storage. 47:103574 |
| ISSN: | 2352-152X |
| Popis: | Energy conversion and storage are crucial for overcoming energy-shortage problems. Herein, we designed and synthesized a type of magnetic phase-change microcapsule system for enhancing solar light-to-heat conversion efficiency through the synergetic conversion of photothermal and magnetocaloric energy. This microcapsule system was based on an n-eicosane core and a Fe3O4/CaCO3 composite shell and fabricated by means of a Pickering emulsion-templated in-situ precipitation technique. The composite microcapsules so obtained exhibit a regular spherical morphology and a well-defined core–shell microstructure, together with the desired chemical compositions and magnetic characteristics. The introduction of Fe3O4 nanoparticles enhanced the stability of the emulsion-templating system, resulting in an improvement in the phase-change enthalpies of the resultant composite microcapsules. Moreover, the presence of Fe3O4 nanoparticles endowed the microcapsule system with magnetic characteristics to realize a photothermal and magnetocaloric synergetic conversion. The composite microcapsules achieved a satisfactory latent-heat capacity of over 110 J/g and high photothermal conversion efficiency of 86.4%. More importantly, the composite microcapsules developed in this work presented a remarkable accelerated period of energy storage by 47.5% under an alternating magnetic field compared to those without an applied magnetic field. This study provides a promising approach for the design and development of phase-change microcapsules with a magnetism-accelerated energy conversion capability for efficient utilization of solar energy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect