Carbon nanotube sheet as a microporous layer for proton exchange membrane fuel cells

被引：44
作者：
Kim, Jaeyeon [1 ]
Kim, Hyeok [1 ]
Song, Hyeonjun [2 ]
Kim, Dasol [1 ]
Kim, Geon Hwi [1 ]
Im, Dasom [2 ]
Jeong, Youngjin [2 ,3 ]
Park, Taehyun [1 ]
机构：
[1] Soongsil Univ, Sch Mech Engn, 369 Sangdo Ro, Seoul 06978, South Korea
[2] Soongsil Univ, Dept Informat Commun Mat & Chem Convergence Techn, 369 Sangdo Ro, Seoul 06978, South Korea
[3] Soongsil Univ, Dept Organ Mat & Fiber Engn, 369 Sangdo Ro, Seoul 06978, South Korea
来源：
ENERGY | 2021年 / 227卷
关键词：
Proton exchange membrane fuel cell; Multi-walled carbon nanotube sheet; Gas diffusion layer; Microporous layer; Electrochemical impedance spectroscopy; GAS-DIFFUSION-LAYER; MICRO-POROUS LAYER; OHMIC RESISTANCE; ENHANCED PERFORMANCE; WATER MANAGEMENT; CATALYST LAYER; CRACK-FREE; HYDROGEN; DESIGN;
D O I：
10.1016/j.energy.2021.120459
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A multi-walled carbon nanotube (CNT) sheet was employed and investigated as a microporous layer (MPL) of proton exchange membrane fuel cell (PEMFC). The CNT sheet was synthesized via floating catalyst chemical vapor deposition method. The CNT sheet MPLs with the thickness of 15, 30, and 100 mm were prepared and compared with a commercial carbon-black MPL. As a result, it was found that the PEMFC with the 15-mu m-thick CNT sheet MPL showed high electrochemical performance, and it out-topped the conventional PEMFC. The 15-mm-thick CNT sheet MPL increased the peak power density by 50.9% in air-supplied cathode and 20.9% in pure oxygen-supplied cathode compared to the conventional PEMFC. Through electrochemical impedance analyses, it was found that the CNT sheet MPL effectively decreased a charge transfer resistance, which is attributed to the improved reaction kinetics and mass transport through the MPL. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：8
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