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

被引：152

作者：

Liu, Kang ^{[1
]}

Ding, Tianpeng ^{[1
]}

Li, Jia ^{[1
]}

Chen, Qian ^{[1
]}

Xue, Guobin ^{[1
]}

Yang, Peihua ^{[1
]}

Xu, Ming ^{[2
]}

Wang, Zhong Lin ^{[3
,4
]}

Zhou, Jun ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China

[3] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[4] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100083, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2018年 / 8卷 / 13期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

electrokinetic; porous carbon films; self-powered; thermal-electric; waste heat; THERMOELECTRIC FIGURE; ENERGY; POWER; HEAT; CONVERSION; MERIT; TEMPERATURE; NANOTUBE;

D O I：

10.1002/aenm.201702481

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页数：6

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