Highly Sensitive Self‐Powered H2 Sensor Based on Nanostructured Thermoelectric Silicon Fabrics,Advanced Materials Technologies

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Highly Sensitive Self‐Powered H2 Sensor Based on Nanostructured Thermoelectric Silicon Fabrics
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-11-13 , DOI: 10.1002/admt.202000870
Mercè Pacios Pujadó ₁ , Jose Manuel Sojo Gordillo ₁ , Hemesh Avireddy ₁ , Andreu Cabot _{1,

2} , Alex Morata ₁ , Albert Tarancón _{1,

2}

Affiliation

Self‐powered sensors running on small differences of temperature are considered promising candidates to cover the increasing demand of sustainable and maintenance‐free wireless sensor networks for the Internet of Things (IoT). Under this context, a cost‐effective and self‐powered hydrogen thermoelectric sensor is presented here as a proof of concept for battery‐less IoT nodes. The device is based on low‐density paper‐like fabrics made of functionalized thermoelectric silicon nanotubes able to harvest energy from the heat released by exothermic reactions, such as the hydrogen catalytic oxidation. This gives an accurate value of the reacting gas concentration without any external power requirement. Experimental results confirm that this self‐powered sensor can autonomously measure concentrations as low as 250 ppm of hydrogen in air while generating power densities up to 0.5 μW cm⁻² for 3% H₂ at room temperature that can be eventually used to store or send the reading. Due to the universality of the concept, this new class of devices will positively contribute toward the development of other advanced self‐powered sensor nodes in the advent of the Internet of things to be used in different safety scenarios.

中文翻译：

基于纳米结构热电硅纤维的高灵敏度自供电氢气传感器

在温差很小的情况下运行的自供电传感器被认为是有前途的候选产品，可满足物联网（IoT）对可持续且免维护的无线传感器网络不断增长的需求。在这种情况下，这里提出了一种具有成本效益的自供电氢气热电传感器，作为无电池物联网节点的概念证明。该设备基于由功能化热电硅纳米管制成的低密度纸状织物，能够从放热反应（例如氢催化氧化）释放的热量中收集能量。这无需任何外部电源即可给出反应气体浓度的准确值。室温下3％H ₂为⁻²，最终可用于存储或发送读数。由于该概念的普遍性，随着将在不同安全场景中使用的物联网的出现，这种新型设备将为其他高级自供电传感器节点的发展做出积极贡献。

更新日期：2021-01-05

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