Nanofiber/Nanoparticle Electrodes for Ultra-low Platinum Fuel Cells via Simultaneous Foam Electrospinning and Electrospraying

IF 2.6 4区 工程技术 Q3 ELECTROCHEMISTRY
Fuel Cells Pub Date : 2024-11-21 DOI:10.1002/fuce.202400069
Dohyun Kim, Rui Sun, Yossef A. Elabd
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引用次数: 0

Abstract

In this study, we developed a new technique, simultaneous foam electrospinning and electrospraying (FE/E), that produces nanofiber/nanoparticle electrodes at higher production rates compared to needle-based electrospinning and electrospraying (E/E). Herein, the nanofiber amount was precisely controlled by applying various voltages on the foam electrospinning process at a fixed platinum (Pt) loading, which enables an exclusive investigation into the impact of ionomer nanofiber on fuel cell performance at ultra-low Pt loadings for proton exchange membrane fuel cells. The results show that fuel cell performance is strongly dependent on ionomer nanofiber content. At 0.04 mg/cm2 nanofiber amount, the electrodes exhibited the highest fuel cell power density of 1.09 W/cm2 and Pt utilization of 11.5 kW/gPt, which are 28% and 39% higher than those of the electrode produced via electrospraying alone, respectively. The improvement results from enhanced proton and gas transport stemming from the nanofiber network as verified by cyclic voltammetry, electrochemical impedance spectroscopy, and oxygen gain voltage analysis. The FE/E technique provides a pathway to produce ultra-low Pt nanofiber/nanoparticle electrodes at high production rates and high fuel cell performance.

泡沫静电纺丝和静电喷涂超低铂燃料电池的纳米纤维/纳米颗粒电极
在这项研究中,我们开发了一种新技术,即同步泡沫静电纺丝和电喷涂(FE/E),与针基静电纺丝和电喷涂(E/E)相比,它能以更高的生产率生产纳米纤维/纳米颗粒电极。本文通过在固定铂(Pt)负载的泡沫静电纺丝过程中施加不同的电压来精确控制纳米纤维的数量,从而可以对质子交换膜燃料电池在超低铂负载下离子纳米纤维对燃料电池性能的影响进行独家研究。结果表明,燃料电池的性能在很大程度上取决于离子纳米纤维的含量。当纳米纤维用量为0.04 mg/cm2时,电极的燃料电池功率密度最高,为1.09 W/cm2, Pt利用率最高,为11.5 kW/gPt,分别比电喷涂制备的电极高28%和39%。通过循环伏安法、电化学阻抗谱和氧增益电压分析证实,纳米纤维网络增强了质子和气体输运。FE/E技术为生产超低铂纳米纤维/纳米颗粒电极提供了一条高生产率和高燃料电池性能的途径。
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来源期刊
Fuel Cells
Fuel Cells 工程技术-电化学
CiteScore
5.80
自引率
3.60%
发文量
31
审稿时长
3.7 months
期刊介绍: This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.
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