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Thermal–Electric Nanogenerator Based on the Electrokinetic Effect in Porous Carbon Film

机译：基于电动力学效应的多孔碳膜热电纳米发电机

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摘要

Converting low-grade thermal energy with small temperature gradient into electricity is challenging due to the low efficiency and high cost. Here, a new type of thermal-electric nanogenerator is reported that utilizes electrokinetic effect for effective harvesting thermal energy. The nanogenerator is based on an evaporation-driven water flow in porous medium with small temperature gradient. With a piece of porous carbon film and deionized water, a maximum open-circuit voltage of 0.89 V under a temperature difference of 4.2 degrees C is obtained, having a corresponding pseudo-Seebeck coefficient of 210 mV K-1. The large pseudo-Seebeck coefficient endows the nanogenerator sufficient power output for powering existing electronics directly. Furthermore, a wearable bracelet nanogenerator utilizing body heat is also demonstrated. The unique properties of such conversion process offer great potential for ultra-low temperature-gradient thermal energy recovery, wearable electronics, and self-powered sensor systems.
机译：由于效率低和成本高，将具有小温度梯度的低级热能转换成电能具有挑战性。在这里，报道了一种新型的热电纳米发电机，其利用电动效应来有效地收集热能。纳米发电机基于蒸发驱动的水在温度梯度较小的多孔介质中的流动。用一片多孔碳膜和去离子水，在4.2℃的温度差下获得0.89V的最大开路电压，其对应的拟塞贝克系数为210mV K-1。较大的拟塞贝克系数赋予纳米发电机足够的功率输出，可直接为现有电子设备供电。此外，还展示了利用体热的可穿戴手镯纳米发电机。这种转换过程的独特特性为超低温梯度热能回收，可穿戴电子设备和自供电传感器系统提供了巨大潜力。

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  • 来源
    《Advanced energy materials》 |2018年第13期|1702481.1-1702481.6|共6页
  • 作者

    Liu Kang; Ding Tianpeng; Li Jia; Chen Qian; Xue Guobin; Yang Peihua; Xu Ming; Wang Zhong Lin; Zhou Jun;

  • 作者单位

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China;

    Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA;

    Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    electrokinetic; porous carbon films; self-powered; thermal-electric; waste heat;

    机译：电动;多孔碳膜;自供电;热电;余热;

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