Analysis of membraneless formic acid microfuel cell using a planar microchannel

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2007-02-01 DOI:10.1016/j.electacta.2006.09.011

Falin Chen , Min-Hsing Chang , Mu-Kun Lin

{"title":"Analysis of membraneless formic acid microfuel cell using a planar microchannel","authors":"Falin Chen , Min-Hsing Chang , Mu-Kun Lin","doi":"10.1016/j.electacta.2006.09.011","DOIUrl":null,"url":null,"abstract":"<div><p><span>A novel design of membraneless microfuel cell employing a planar microchannel has been investigated theoretically in this study. The fuel and oxidant are, respectively, formic acid and oxygen and both dissolved in dilute sulfuric acid solutions. Both liquid streams enter the planar microchannel and flow in parallel without the need of a membrane to separate them. A theoretical model is developed to simulate the species transport in both anode and cathode streams and the cell performance is analyzed accordingly by examining the effects of </span>flow rate, concentration, and the geometric size of the system. The results show that the cell performance is mainly restricted by the high transport resistance in the cathode stream. It is found that the transport of oxygen to the cathode electrode can be improved significantly by using a higher flow rate or oxygen concentration, or a thicker cathode catalyst layer. However, the effectiveness of the flow rate and thickness of catalyst layer diminishes gradually which indicates that there exist optimal conditions of these parameters. The influences of thickness and length of the microchannel on cell performance are also examined in detail.</p></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.electacta.2006.09.011","citationCount":"80","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013468606009455","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}

引用次数: 80

Abstract

A novel design of membraneless microfuel cell employing a planar microchannel has been investigated theoretically in this study. The fuel and oxidant are, respectively, formic acid and oxygen and both dissolved in dilute sulfuric acid solutions. Both liquid streams enter the planar microchannel and flow in parallel without the need of a membrane to separate them. A theoretical model is developed to simulate the species transport in both anode and cathode streams and the cell performance is analyzed accordingly by examining the effects of flow rate, concentration, and the geometric size of the system. The results show that the cell performance is mainly restricted by the high transport resistance in the cathode stream. It is found that the transport of oxygen to the cathode electrode can be improved significantly by using a higher flow rate or oxygen concentration, or a thicker cathode catalyst layer. However, the effectiveness of the flow rate and thickness of catalyst layer diminishes gradually which indicates that there exist optimal conditions of these parameters. The influences of thickness and length of the microchannel on cell performance are also examined in detail.

查看原文本刊更多论文

用平面微通道分析无膜甲酸微燃料电池

本文从理论上研究了一种采用平面微通道的新型无膜微燃料电池的设计。燃料和氧化剂分别是甲酸和氧，两者都溶解在稀硫酸溶液中。两种液体流进入平面微通道并平行流动，而不需要膜将它们分开。建立了一个理论模型来模拟阳极和阴极流中的物质传输，并通过检查流速、浓度和系统几何尺寸的影响相应地分析了电池性能。结果表明，阴极流中的高输运电阻是制约电池性能的主要因素。研究发现，采用较高的流速或氧浓度，或较厚的阴极催化剂层，都能显著改善氧向阴极电极的输运。然而，流速和催化剂层厚度的有效性逐渐降低，表明这些参数存在最优条件。并详细分析了微通道的厚度和长度对电池性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.