Heat-triggered high-performance thermocells enable a self-powered forest fire alarm

被引：30

作者：

Yu, Boyang ^{[1
]}

Yang, Wei ^{[1
]}

Li, Jia ^{[1
]}

Xie, Wenke ^{[1
]}

Jin, Hongrun ^{[1
]}

Liu, Rong ^{[1
]}

Wang, Hui ^{[1
]}

Zhuang, Xinyan ^{[1
]}

Qi, Bei ^{[1
]}

Liu, Shiyou ^{[1
]}

Huang, Liang ^{[1
]}

Hu, Bin ^{[1
]}

Duan, Jiangjiang ^{[1
]}

Zhou, Jun ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2021年 / 9卷 / 46期

基金：

中国国家自然科学基金;

关键词：

CARBON-NANOTUBE; ENERGY; ELECTRICITY;

D O I：

10.1039/d1ta06793a

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：

Harvesting heat from fire itself to power wireless sensor networks has the potential to realize effective detection and alarm for forest fires. Thermocells based on the thermogalvanic effect offer an inexpensive and scalable way for heat-to-electricity conversion but challenged by their low performance. We demonstrate a boosted thermogalvanic effect by introducing concentration gradients into a thermocell, achieving a one order magnitude enhancement of output up to 45.9 W m(-2). Using a heat-triggered membrane as the start switch, a thermocell which can hibernate in peacetime and awaken when fire occurs, is further obtained. A proof-of-concept device integrated from five units successfully detects precombustion and open fire to synchronously generate a high voltage of similar to 2 V for driving an alarm. This system shows promise for combating the globally increasing forest fires.

引用

页码：26119 / 26126

页数：8

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