Development of flexible and multi-functional micro sensors to diagnose in-situ fuel cell performance

• Main Authors: Wei-Yuan Fan, 范維元
• Other Authors: Chi-Yuan Lee
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/43471363389793600285

碩士 === 元智大學 === 機械工程學系 === 98 === Fuel cell temperature and humidity during operations the development of proton exchange membrane fuel cell (PEMFC). The overall fuel cell performance largely accounts for the fuel cell temperature and humidity operating conditions not achieving the ideal circumstances. Too high fuel related humidity easily leads to flooding in the downstream of the fuel cell, while the contact of gas and the membrane electrode assembly (MEA) degrades the performance of fuel cells. Most of the cm-scale sensors in studies evaluating the internal performance of fuel cells are placed next to fuel cell measurements. In addition to easily destroying the overall construction of fuel cells, this method manipulates the sensor too degrade the performance of fuel cells. By using micro-electro-mechanical systems (MEMS) this work develops a micro temperature, humidity and voltage sensor on stainless steel foil. The proposed sensor is superior to conventional ones in terms of its high strength, flexibility, low cost, mass production and small volume, as well as its strong potential for portable energy. Micro sensor test results indicate that the accuracy and reproducibility performance of the proposed sensor is excellent. Our results further demonstrate that the fuel cell performance is similar with relative humidity of 75% and 100%.