Improvement of PEMFC performance and endurance by employing continuous silica film incorporated water transport plate
Improvement of PEMFC performance and endurance by employing continuous silica film incorporated water transport plate
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采用连续二氧化硅薄膜输水板提高质子交换膜燃料电池的性能和耐久性
DOI：
10.1016/j.electacta.2016.01.059
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发表时间：
2016-02-10
影响因子：
6.6
通讯作者：
Yi, Baolian
中科院分区：
文献类型：
--
作者：
Guo, Xiaoqian;Zeng, Yachao;Yi, Baolian
在膜脱水和水驱之间保持适当的水平衡是提高聚合物电解质膜燃料电池（PEMFC）性能和耐久性的关键。在这项研究中，一种新型的亲水性多孔碳板（HPCP）被用来作为水传输板（WTP），凭借其加湿和排水功能来实现水平衡。通过电化学辅助自组装方法在多孔碳板的孔表面形成亲水性二氧化硅膜。为了克服前驱体不能进入PCP疏水孔的问题，设计了一种新型的电沉积装置，迫使前驱体流过PCP的疏水孔。因此，获得了连续的亲水性孔，这提高了增湿和排水的能力。由于HPCP的增湿作用，在1000 mA·cm ~（-2）电流密度下，HPCP电池的电压比无湿固体板（SP）电池的电压高270 mV。由于排水功能，在死端阴极操作下，电池的运行时间比SP长12倍。(C)2016爱思唯尔有限公司版权所有
An appropriate water balance between membrane dehydration and water flooding is essential to improve the performance and endurance of the polymer electrolyte membrane fuel cell (PEMFC). In this study, a novel hydrophilic porous carbon plate (HPCP) is employed as a water transport plate (WTP) to achieve the water balance by virtue of its humidification and water drainage functions. The HPCP is fabricated by electrochemically assisted self-assembly of a hydrophilic silica film on the pore surface of a porous carbon plate (PCP). To overcome the problem that the precursor is unable to enter the hydrophobic pores of the PCP, a novel electro-deposition device forcing the precursor to flow through the pores is designed. Consequently, continuous hydrophilic pores are obtained which promotes the ability of humidification and water drainage. Owing to the humidification function of the HPCP, at the current density of 1000 mA cm(-2), the voltage of the cell with HPCP is 270 mV higher than that with solid plate (SP) under no-humidity. Attributed to the water drainage function, the runtime of the cell is twelve times longer than that with SP under dead-ended cathode operation. (C) 2016 Elsevier Ltd. All rights reserved.