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Construction of Fully Integrated and Energy Self-Sufficient NO2 Gas Sensors Utilizing Zinc-Air Batteries
ACS Sensors ( IF 8.2 ) Pub Date : 2024-07-22 , DOI: 10.1021/acssensors.4c00896 Feifei Li 1 , Xiao Wang 1 , Xixi Li 1 , Yao Fu 1 , Zhaokun Sun 1 , Keyang Zhao 1 , Cunguang Zhu 2 , Xijin Xu 1
ACS Sensors ( IF 8.2 ) Pub Date : 2024-07-22 , DOI: 10.1021/acssensors.4c00896 Feifei Li 1 , Xiao Wang 1 , Xixi Li 1 , Yao Fu 1 , Zhaokun Sun 1 , Keyang Zhao 1 , Cunguang Zhu 2 , Xijin Xu 1
Affiliation
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Exploration of novel self-powered gas sensors free of external energy supply restrictions, such as light illumination and mechanical vibration, for flexible and wearable applications is in urgent need. Herein, this work constructs a flexible and self-powered NO2 gas sensor based on zinc-air batteries (ZABs) with the cathode of the ZABs also acting as the gas-sensitive layer. Furthermore, the SiO2 coating film, serving as a hydrophobic layer, increases the three-phase interfaces for the NO2 reduction reaction. The constructed sensors exhibit a high sensing response (0.3 V @ 5 ppm), an ultralow detection limit (61 ppb), a fast sensing process (129 and 103 s), and excellent selectivity. Moreover, the sensors also possess a wide working temperature range and a low working temperature tolerance (0.34 V at −15 °C). Simulations indicate that the hydrophobic surface at the cathode−hydrogel interface will accommodate more NO2 gas molecules at the reaction sites and prevent the influence of inner water evaporation and direct dissolution of NO2 in the electrolyte, which is beneficial to the enhanced gas sensing abilities. Finally, the self-powered sensing device is incorporated into a smart sensing system for practical applications. This work will pave a new insight into the construction of integrated and energy self-sufficient smart gas sensing systems.
中文翻译：
利用锌空气电池构建完全集成且能源自给的 NO2 气体传感器
迫切需要探索新型自供电气体传感器，不受光照明和机械振动等外部能源供应限制，用于灵活和可穿戴应用。本文构建了一种基于锌空气电池（ZAB）的灵活自供电NO 2气体传感器，ZAB的阴极也充当气体敏感层。此外，SiO 2涂膜作为疏水层，增加了用于NO 2还原反应的三相界面。构建的传感器具有高传感响应（0.3 V @ 5 ppm）、超低检测限（61 ppb）、快速传感过程（129 和 103 s）以及出色的选择性。此外，传感器还具有较宽的工作温度范围和较低的工作温度容限（-15°C 时为 0.34 V）。模拟结果表明，阴极-水凝胶界面的疏水表面将在反应位点容纳更多的NO 2气体分子，防止内部水蒸发和NO 2直接溶解在电解质中的影响，有利于增强气体传感能力。最后，将自供电传感装置集成到智能传感系统中进行实际应用。这项工作将为构建集成且能源自给自足的智能气体传感系统提供新的见解。
更新日期：2024-07-22
中文翻译：
利用锌空气电池构建完全集成且能源自给的 NO2 气体传感器
迫切需要探索新型自供电气体传感器，不受光照明和机械振动等外部能源供应限制，用于灵活和可穿戴应用。本文构建了一种基于锌空气电池（ZAB）的灵活自供电NO 2气体传感器，ZAB的阴极也充当气体敏感层。此外，SiO 2涂膜作为疏水层，增加了用于NO 2还原反应的三相界面。构建的传感器具有高传感响应（0.3 V @ 5 ppm）、超低检测限（61 ppb）、快速传感过程（129 和 103 s）以及出色的选择性。此外，传感器还具有较宽的工作温度范围和较低的工作温度容限（-15°C 时为 0.34 V）。模拟结果表明，阴极-水凝胶界面的疏水表面将在反应位点容纳更多的NO 2气体分子，防止内部水蒸发和NO 2直接溶解在电解质中的影响，有利于增强气体传感能力。最后，将自供电传感装置集成到智能传感系统中进行实际应用。这项工作将为构建集成且能源自给自足的智能气体传感系统提供新的见解。
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