Biobatteries and biofuel cells with biphenylated carbon nanotubes

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• 作者：Krzysztof Stolarczyk ; Micha艂 Kizling ; Dominika Majdecka ; Kamila 呕elechowska ; Jan F. Biernat ; Jerzy Rogalski ; Renata Bilewicz
• 关键词：Arylated carbon nanotubes ; Bioelectrocatalysis ; Dioxygen reduction ; Glucose oxidation ; Biofuel cell ; Laccase
• 刊名：Journal of Power Sources
• 出版年：1 March, 2014
• 年：2014
• 卷：249
• 期：Complete
• 页码：263-269
• 全文大小：929 K

文摘

Single-walled carbon nanotubes (SWCNTs) covalently biphenylated are used for the construction of cathodes in a flow biobattery and in flow biofuel cell. Zinc covered with a hopeite layer is the anode in the biobattery and glassy carbon electrode covered with bioconjugates of single-walled carbon nanotubes with glucose oxidase and catalase is the anode of the biofuel cell. The potentials of the electrodes are measured vs. the Ag/AgCl reference electrode under changing loads of the fuel cell/biobattery. The power density of the biobattery with biphenylated nanotubes at the cathode is ca. 0.6聽mW聽cm^鈭? and the open circuit potential is ca. 1.6聽V. In order to obtain larger power densities and voltages three biobatteries are connected in a series which leads to the open circuit potential of ca. 4.8聽V and power density 2.1聽mW聽cm^鈭? at 3.9聽V under 100聽k惟 load. The biofuel cell shows power densities of ca. 60聽渭W聽cm^鈭? at 20聽k惟 external resistance but the open circuit potential for such biofuel cell is only 0.5聽V. The biobattery showing significantly larger power densities and open circuit voltages are especially useful for testing novel cathodes and applications such as powering units for clocks and sensing devices.