Aerobic and anaerobic operation of an active membraneless direct methanol fuel cell

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• 作者：Alfred Lam^a ; ^b ; Mohammad S. Dara^a ; David P. Wilkinson^a ; ^b ; ^{dwilkinson@chbe.ubc.ca} ; Khalid Fatih^a ; ^b
• 关键词：Membraneless ; Direct methanol fuel cell ; Direct methanol redox fuel cell ; Aerobic ; Anaerobic
• 刊名：Electrochemistry Communications
• 出版年：2012
• 期刊代码：29_13882481
• 类别：ch
• 出版时间：April, 2012
• 卷：17
• 期：Complete
• 页码：22-25
• 文件大小：1025 K

摘要

In this paper the operational and architectural flexibilities of a membraneless direct liquid fuel cell were demonstrated under aerobic and anaerobic configurations at 60 掳C and 1 atm. The aerobic membraneless direct methanol fuel cell (DMFC) was fed an anolyte solution of 1 M CH₃OH/0.5 M H₂SO₄ and an air oxidant. The anaerobic membraneless direct methanol redox fuel cell (DMRFC) was fed an anolyte solution of 1 M CH₃OH/0.1 M HClO₄ and a catholyte solution of 2 M Fe(ClO₄)₃ and 0.22 M Fe(ClO₄)₂ oxidant. For both cases the membraneless architecture performed significantly better than for the conventional PEM architecture with Nafion庐 117. The maximum power density for the membraneless and Nafion庐 117 based DMFC was 52 mW鈰卌m^鈭?#xA0;2 and 41 mW鈰卌m^鈭?#xA0;2 respectively. The maximum power density for the membraneless and Nafion庐 117 based DMRFC was 46 mW鈰卌m^鈭?#xA0;2 and 34 mW鈰卌m^鈭?#xA0;2 respectively. In addition, anaerobic operation using a Fe^2 +/Fe^3 + catholyte gave similar performance to that for air as an oxidant. Both membraneless and anaerobic operation can result in significant cost reduction with improved operational flexibility.