Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/67607
標題: Clay as a dispersant in the catalyst layer for zinc-air fuel cells
作者: Chao, W.K.
薛富盛
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
Project: Journal of Power Sources
期刊/報告no:: 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.
URI: http://hdl.handle.net/11455/67607
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2007.11.047
Appears in Collections:工學院

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