Among the key technologies required for building industrial safety systems is portable integrated safety devices based on gas sensors and rechargeable batteries. In preparation for such integrated devices, this study focuses on the synthesis of sodium vanadate nanofibers (SVNF) and poly(3,4-ethylene dioxythiophene) (PEDOT) intercalated SVNF (E-SVNF) composites by a simple sonochemical approach for room temperature NH gas sensing and zinc ion battery (ZIB) studies. Applying E-SVNF to ZIBs resulted in superior rate capability, with a capacity of 192.13 mAh g at 15 A g. Furthermore, they demonstrated long-term cycling stability, maintaining 83.47% of their capacity at 15 A g even after 3,000 cycles. The gas sensor incorporating E-SVNF showcased a high response and excellent selectivity, even at room temperature, with response values of 1.059 for 10 ppm and 1.113 for 70 ppm of NH gas. These remarkable enhancements in the electrochemical performance of ZIBs and the gas sensor are attributed to the insertion of conductive polymers between SVNF layers. This resulted in improved electrical conductivity, increased interlayer distance in the vanadate nanofiber structure, enhanced layered structural stability, increased oxygen vacancies, a decreased work function, and the formation of p-p heterojunctions, all of which contribute to improved functionality of the composites materials. This research is expected to serve as a cornerstone for the development of industrial safety systems.

中文翻译：

---

室温合成导电聚合物插层钒酸钠纳米纤维复合材料作为水性锌离子电池和NH3气体传感器活性材料

构建工业安全系统所需的关键技术之一是基于气体传感器和可充电电池的便携式集成安全装置。为了准备此类集成器件，本研究重点是通过简单的室温 NH 声化学方法合成钒酸钠纳米纤维 (SVNF) 和聚 (3,4-乙烯二氧噻吩) (PEDOT) 插层 SVNF (E-SVNF) 复合材料气体传感和锌离子电池（ZIB）研究。将 E-SVNF 应用于 ZIB 可以获得优异的倍率性能，在 15 A g-1 时容量为 192.13 mAh g-1。此外，它们还表现出长期循环稳定性，即使在 3,000 次循环后，在 15 A g-1 下仍能保持 83.47% 的容量。即使在室温下，采用 E-SVNF 的气体传感器也表现出高响应和出色的选择性，对于 10 ppm 的 NH 气体响应值为 1.059，对于 70 ppm NH 气体响应值为 1.113。ZIB 和气体传感器电化学性能的显着增强归功于 SVNF 层之间插入的导电聚合物。这导致导电率提高、钒酸盐纳米纤维结构中层间距离增加、层状结构稳定性增强、氧空位增加、功函数降低以及pp异质结的形成，所有这些都有助于提高复合材料的功能。这项研究预计将成为工业安全系统开发的基石。