材料科学
多孔性
功勋
压电响应力显微镜
热电性
陶瓷
压电
碳纳米管
复合材料
热的
能量收集
纳米技术
光电子学
电介质
能量(信号处理)
铁电性
物理
统计
气象学
数学
作者
Qingping Wang,Song He,Chris Bowen,Xiao Xiao,Jin An Sam Oh,Jianguo Sun,Kaiyang Zeng,Wen Lei,Jun Chen
出处
期刊:Nano Energy
[Elsevier]
日期:2022-11-01
卷期号:102: 107703-107703
被引量:7
标识
DOI:10.1016/j.nanoen.2022.107703
摘要
The recycling of low-grade thermal energy from our surroundings is an environmental-friendly approach to contribute to sustainability, which remains a grand challenge. Herein, a high-performance porous pyroelectric ceramic formed using carbon nanotubes (CNT) is designed and fabricated using a modified solid-state reaction technique. Localized characterization of PMN-PMS-PZT and PMN-PMS-PZT with 0.3 wt% CNT additions by piezoelectric force microscopy suggests that the presence of porosity and defects in grains can restrict the reversal of domains and weaken the local piezoresponse; that is due to the influence of porosity on the electric field, domain morphology, or screening effects induced by defects at the pore surface. More importantly, the porous ceramics showed enhanced figure of merits, including voltage responsibility and energy harvesting figure of merit, compared to the dense ceramic. The harvested energy increased by 208% when the 0.3 wt% of CNT was added to produce porosity, which has a potential application in thermal energy harvesting and sensing system.
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