摩擦电效应
能量收集
碲化铋
聚二甲基硅氧烷
材料科学
热能
功率(物理)
电气工程
纳米技术
热电材料
计算机科学
机械工程
工程类
热导率
物理
复合材料
量子力学
作者
Byungseok Seo,Youngsun Cha,Sangtae Kim,Wonjoon Choi
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2019-07-12
卷期号:4 (9): 2069-2074
被引量:35
标识
DOI:10.1021/acsenergylett.9b01426
摘要
Despite the rise in Internet of Things devices and mobile electronics, devising an energy harvester with sufficient time-averaged power remains a challenge when targeting human activities. Here, we report a hybrid thermo-triboelectric generator targeting human motion with systematic optimization strategies in frequency feature-size variable spaces. The device consists of bismuth telluride (Bi2Te3) tiles with polydimethylsiloxane (PDMS) layers filled in between, thereby harvesting both thermal energy and triboelectricity from human touch. Detailed heat transport analyses reveal that optimal operational frequency for thermoelectrics may be tuned on the basis of the insulation property of PDMS. Meanwhile, triboelectricity exhibits strong feature-size dependence when PDMS is interfaced with high-dielectric thermoelectric materials. The analyses establish the design guidelines for a hybrid energy harvester that outperforms the simple physical addition of constituent energy harvesters and demonstrates an average power of 3.27 μW/cm3, which is feasible to power potential applications operated by human touch at 2.5 Hz.
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