Zhang Hongjian, Fang Yi, Lee Junki, Jeong Chang Kyu, Zhang Yong
State Key Laboratory of Silicate Materials for Architectures, Center for Smart Materials and Device Integration, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
ACS Appl Mater Interfaces. 2024 Nov 13;16(45):62617-62626. doi: 10.1021/acsami.4c12507. Epub 2024 Oct 29.
Self-powered sensors, capable of detecting static and dynamic pressure without an external power source, are pivotal for advancements in human-computer interaction, health monitoring, and artificial intelligence. Current sensing technologies, however, often fall short of meeting the growing needs for precise and timely pressure monitoring. This article introduces a novel self-powered pressure sensor utilizing electrochemical reactions. The sensor's ion conduction path and internal resistance adjust in response to external stress across a broad range. Its three-dimensional structure, crafted by using a simple template on the electrolyte, enables the efficient and cost-effective detection of various mechanical stimuli. This device not only achieves an optimized power density of approximately 2.34 mW cm─surpassing most existing technologies─but also features excellent flexibility, quick response, and recovery times (0.15 and 0.19 s respectively); high durability (2000 cycles); and a broad sensing range (0.23-20 kPa). Moreover, it serves as an ionic touchpad, enhancing data collection and recognition, and integrates seamlessly with a mouthpiece for accurate, real-time monitoring of respiratory activities. This innovative sensor offers minimal cost and simple process requirements while providing multifunctional capabilities for energy harvesting and pressure sensing, marking a significant step forward in the design of next-generation sensors.
自供电传感器能够在无需外部电源的情况下检测静态和动态压力，对于人机交互、健康监测和人工智能的发展至关重要。然而，当前的传感技术往往无法满足对精确和及时压力监测日益增长的需求。本文介绍了一种利用电化学反应的新型自供电压力传感器。该传感器的离子传导路径和内阻会根据外部应力在很宽的范围内进行调整。其三维结构通过在电解质上使用简单模板制成，能够高效且经济地检测各种机械刺激。该装置不仅实现了约2.34 mW/cm²的优化功率密度——超过了大多数现有技术——还具有出色的柔韧性、快速响应和恢复时间（分别为0.15和0.19秒）；高耐用性（2000次循环）；以及宽传感范围（0.23 - 20 kPa）。此外，它还可作为离子触摸板，增强数据收集和识别能力，并能与吹口无缝集成，用于准确、实时监测呼吸活动。这种创新型传感器成本极低且工艺要求简单，同时具备能量收集和压力传感的多功能能力，标志着下一代传感器设计向前迈出了重要一步。
