期刊
NANO ENERGY
卷 60, 期 -, 页码 144-152出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.03.037
关键词
Hexagonal boron nitride; Pyroelectric ceramic; Thermal conductivity; Thermal energy harvesting
类别
资金
- National Science Foundation of China [U1532146, 61675076, 61705070, 51672092, U1732117]
- China Postdoctoral Science Foundation [2017M612449, 2017T200545]
- Natural Science Foundation of Hubei Province of China [2016CFB533]
- Wuhan Morning Light Plan of Youth Science and Technology [2017050304010299]
- Analytical and Testing Center of Huazhong University of Science and Technology
Recently, recycling energy from wasted heat with pyroelectric materials has received significant attention. However, pyroelectric energy harvesters generally suffer from a low energy efficiency due to the low rates of heat transfer. Here, we report high-performance thermal energy harvesting using novel hybrid pyroelectric ceramics with greatly improved heat transfer and rate of temperature changes. This is achieved by evenly dispersing 0.1 wt% hexagonal boron nitride (hBN) nanosheets into a Pb[(Mn1/3Nb2/3)(1/2)(Mn1/3Sb2/3)(1/2)](0.04)(Zr0.95Ti0.05)(0.96)O-3 (lead magnesium niobate-lead antimony-manganese-lead zirconate titanate: PMN-PMS-PZT) ceramic matrix. Due to the vibrations of whole chain and phonon scattering, heat transfer through the hybrid crystalline chain is more efficient than that of unfilled PMN-PMS-PZT. It is demonstrated that the harvested power was increased by up to 65.6%. This work paved an efficient and cost-effective way to largely improve the traditional pyroelectric ceramic for thermal energy harvesting.
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