环境温度对纸基微流体燃料电池性能影响的实验研究

Experimental Study on the Influence of Ambient Temperature on the Performance of Paper-based Microfluidic Fuel Cell

随着诊断和传感领域中小型电子设备对便携式、可持续、清洁电源的需求,刺激了对新型微型电源的研究与开发。纸基微流体燃料电池凭借其结构简单、成本低廉、无污染的特点逐渐成为医学诊断微型电子设备最有前景的供能装置。本文研究了环境温度、燃料浓度对纸基微流体燃料电池输出性能的影响,并且研究了高温下纸基微流体燃料电池的耐久性。研究结果表明,随着环境温度的增大,催化活性不断增强,电池内部离子传输阻力减小,燃料电池输出性能不断提高,温度为45℃时,燃料电池性能达到最优,其峰值功率密度为22.26 mW/cm^(2);提高燃料浓度有利于增强电池内部离子传输速率,减少离子传输阻力,使得电池性能提升;在高温下长时间工作,电池催化剂活性下降,内部离子传输阻力增大,电池性能下降。

The demand for portable,sustainable,and clean power sources for small electronic devices in diagnostics and sensors has stimulated research and development of new miniature power sources.Paper-based microfluidic fuel cells(PMFCs)are gradually becoming the most promising micro-power sources according to their advanced features,including simple structure,low cost,and non-pollution.In the current paper,the effects of ambient temperature and fuel concentration on the output performance of PMFCs were investigated.And the durability of PMFCs at high temperatures was studied.The results show that increasing ambient temperature is beneficial to improve the PMFC performance,mainly because of the enhanced catalytic activity and reduced ion transfer resistance in high temperature.The PMFC achieves the highest peak power density(22.26 mW/cm^(2))at 45℃.Additionally,increasing the fuel concentration helps to enhance the ion transfer rate inside the cell and reduce the ion transfer resistance,resulting in an enhanced cell performance.When PMFC works at high temperature for a long time,its performance decreases due to the decrease of catalyst activity and the increase of internal ion transfer resistance.