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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 工學院 > 依資料類型分類 > 期刊論文 >  Clay as a dispersant in the catalyst layer for zinc-air fuel cells

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/128606

標題: Clay as a dispersant in the catalyst layer for zinc-air fuel cells
作者: Chao, W.K.;Lee, C.M.;Shieu, S.Y.;Chou, C.C.;Shieu, F.S.
關鍵字: membrane electrode assembly;zinc-air fuel cells;carbon block;clay;silicate nanocomposites
日期: 2008
Issue Date: 2012-12-07 14:56:29 (UTC+8)
關連: Journal of Power Sources, Volume 177, Issue 2, Page(s) 637-642.
摘要: This study proposes a four-layer membrane electrode assembly (MEA) consisting of air-electrode, proton exchange membrane, Zn-electrode with KOH or NaCl aqueous electrolyte and a steel supporter, for use in Zn-air fuel cells. Montmorillonite clay was used to disperse carbon black (CB) and MnO2 catalyst to improve the performance of the air-electrode. The microstructures of the air-electrode and cell characteristics were investigated by field emission scanning electron microscopy (FE-SEM), optical microscopy (OM) and an electrochemical analyzer. The experimental results indicate that the four-layer MEA for Zn-air fuel cells reached a power density of 6 mW cm(-2) (at 10mA cm(-2)) without electrolyte leakage from the cells. The open circuit voltage (OCV) and current density were improved by adding clay to the air-electrode as clay can minimize CB aggregation. In the polarization test, the OCV value (1.40 V) reached approximately 90% of the standard potential (1.65 V) and remained steadily over 48 h. These experimental results demonstrate the four-layer MEA can replace conventional Zn-air fuel cells that utilize aqueous electrolyte. (C) 2007 Elsevier B.V. All rights reserved.
Relation: Journal of Power Sources
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 薛富盛

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