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

Jaeyeon Kim, Hyeok Kim, Hyeonjun Song, Dasol Kim, Geon Hwi Kim, Dasom Im, Youngjin Jeong and Taehyun Park

Energy, 2021, vol. 227, issue C

Abstract: 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 μm were prepared and compared with a commercial carbon-black MPL. As a result, it was found that the PEMFC with the 15-μm-thick CNT sheet MPL showed high electrochemical performance, and it outtopped the conventional PEMFC. The 15-μm-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.

Keywords: Proton exchange membrane fuel cell; Multi-walled carbon nanotube sheet; Gas diffusion layer; Microporous layer; Electrochemical impedance spectroscopy (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:227:y:2021:i:c:s0360544221007088

DOI: 10.1016/j.energy.2021.120459

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