期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 230, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.solmat.2021.111240
关键词
Solar-to-thermal conversion; Energy storage; Thermal conductivity; Solar absorption; Biomimetic
资金
- National Key R&D Program of China [2018YFA0702300, 2018YFB1502000]
- National Natural Science Foundation of China [51820105010, 52076106]
By developing nacre-like ceramics embedded with titanium nitride nanoparticles, this study successfully achieves efficient solar-to-thermal conversion and rapid energy storage. The combination of high thermal conductivity biomimetic skeletons and volumetric absorptive phase change materials significantly enhances the solar-to-thermal energy storage rate.
Directly absorbing sunlight and on-site storing thermal energy via phase change processes are promising to achieve efficient and fast solar-to-thermal energy storage. However, the performance is severely inhibited by intrinsically low thermal conductivity and poor optical absorption capability of phase change materials (PCMs). We propose a strategy to achieve integrated efficient solar-to-thermal conversion and ultrafast energy storage by developing nacre-like ceramics embedded with titanium nitride (TiN) nanoparticles (NPs) contained PCMs. A high thermal conductivity of 25.63 W m-1 K-1 compatible with large phase change enthalpy of 157.93 kJ/kg are demonstrated. The excellent performance is attributed to ordered arrangement of silicon carbide ceramics and erythritol PCMs, just like microstructure of natural nacre. Meanwhile, the solar absorptance is improved by exciting localized plasmon resonances of TiN NPs in a broad band. Combination of high thermally conductive biomimetic skeletons with volumetric absorptive PCMs leads to a prominent enhancement of solar-to-thermal energy storage rate by 864%. This work paves a way for the application of ceramics in rapid and efficient solar energy harvesting and thermal energy storage.
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