title: Real-time remote monitoring of temperature and humidity within a proton exchange membrane fuel cell using flexible sensors.
abstract: This study developed portable, non-invasive flexible humidity and temperature microsensors and an in situ wireless sensing system for a proton exchange membrane fuel cell (PEMFC). The system integrated three parts: a flexible capacitive humidity microsensor, a flexible resistive temperature microsensor, and a radio frequency (RF) module for signal transmission. The results show that the capacitive humidity microsensor has a high sensitivity of 0.83 pF%RH(-1) and the resistive temperature microsensor also exhibits a high sensitivity of 2.94 × 10(-3) °C(-1). The established RF module transmits the signals from the two microsensors. The transmission distance can reach 4 m and the response time is less than 0.25 s. The performance measurements demonstrate that the maximum power density of the fuel cell with and without these microsensors are 14.76 mW·cm(-2) and 15.90 mW·cm(-2), with only 7.17% power loss.
authors.affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan. d94522017@ntu.edu.tw
authors.forename: Long-Sheng
authors.initials: LS
authors.lastname: Kuo
authors.forename: Hao-Hsiu
authors.initials: HH
authors.lastname: Huang
authors.forename: Cheng-Hao
authors.initials: CH
authors.lastname: Yang
authors.forename: Ping-Hei
authors.initials: PH
authors.lastname: Chen
mesh_terms: D011211:Electric Power Supplies; D006813:Humidity; D011846:Radio Waves; D013686:Telemetry / Q000379:methods; D013696:Temperature