Analysis and experimental investigation on passive direct methanol fuel cell current collectors with taper cylindrical openings

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2022-09-26 DOI:10.1002/fuce.202200096

N. V. Raghavaiah, G. Naga Srinivasulu

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Abstract

Analysis of buoyancy effect on the evaluation of carbon dioxide gas from passive direct methanol fuel cell current collectors’ (CCs’) openings is carried out. Two types of setups are chosen for the analysis, one with taper cylindrical openings and the other with uniform cylindrical openings. The analysis shows that buoyancy is more effective in taper cylindrical openings due to the accommodation of a larger bubble volume compared to that bubble volume in a uniform cylindrical opening. In this experimental study, SS-316L has been selected as the CC material. During the experiment, it is observed that the CO₂ is getting expelled more easily. The best power density (PD) obtained using taper cylindrical openings at a methanol concentration of 3 M is 7.056 mW cm⁻², whereas it is 5.219 mW cm⁻² in the case of uniform cylindrical openings at the same 3-M methanol concentration. Hence, the taper cylindrical openings are found to perform better at 3-M concentration than cylindrical openings by 35.19% at its best PD point and further, the weight of the CCs is also reduced leading to gravitational PD improvement. Analysis of charge density over the tapered surface is also carried out.

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锥形圆柱形开口非能动直接甲醇燃料电池集电器的分析与实验研究

分析了浮力对被动直接甲醇燃料电池集电器（CC）开口二氧化碳气体评价的影响。选择了两种类型的设置进行分析，一种是锥形圆柱形开口，另一种是均匀圆柱形开口。分析表明，与均匀圆柱形开口中的气泡体积相比，由于容纳了更大的气泡体积，浮力在锥形圆柱形开口中更有效。在本实验研究中，选择SS‐316L作为CC材料。在实验过程中，观察到CO2更容易被排出。在甲醇浓度为3M的情况下，使用锥形圆柱形开口获得的最佳功率密度（PD）为7.056 mW cm−2，而在相同的3M甲醇浓度下，使用均匀圆柱形开口的情况下获得的最佳能量密度为5.219 mW cm–2。因此，发现锥形圆柱形开口在3‐M浓度下的性能比圆柱形开口在其最佳PD点的性能好35.19%，此外，CC的重量也减少了，从而改善了重力PD。还对锥形表面上的电荷密度进行了分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

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.