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Membranes 2015, 5(4), 739-751;

Corrosion Protection of Al/Au/ZnO Anode for Hybrid Cell Application

Bioelectronics Laboratory, Department of Computer Science and Electrical Engineering, University of Maryland Baltimore County, Baltimore, MD 21250, USA
Author to whom correspondence should be addressed.
Academic Editor: Bruno Scrosati
Received: 18 September 2015 / Accepted: 11 November 2015 / Published: 16 November 2015
(This article belongs to the Special Issue Membranes for Electrochemical Energy Applications 2015)
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Effective protection of power sources from corrosion is critical in the development of abiotic fuel cells, biofuel cells, hybrid cells and biobateries for implantable bioelectronics. Corrosion of these bioelectronic devices result in device inability to generate bioelectricity. In this paper Al/Au/ZnO was considered as a possible anodic substrate for the development of a hybrid cell. The protective abilities of corrosive resistant aluminum hydroxide and zinc phosphite composite films formed on the surface of Al/Au/ZnO anode in various electrolyte environments were examined by electrochemical methods. The presence of phosphate buffer and physiological saline (NaCl) buffer allows for the formation of aluminum hyrdroxide and zinc phosphite composite films on the surface of the Al/Au/ZnO anode that prevent further corrosion of the anode. The highly protective films formed on the Al/Au/ZnO anode during energy harvesting in a physiological saline environment resulted in 98.5% corrosion protective efficiency, thereby demonstrating that the formation of aluminum hydroxide and zinc phosphite composite films are effective in the prevention of anode corrosion during energy harvesting. A cell assembly consisting of the Al/Au/ZnO anode and platinum cathode resulted in an open circuit voltage of 1.03 V. A maximum power density of 955.3 mW/ cm2 in physiological saline buffer at a cell voltage and current density of 345 mV and 2.89 mA/ cm2, respectively. View Full-Text
Keywords: corrosion protection; aluminum activation; oxides; nanostructures; sol–gel growth corrosion protection; aluminum activation; oxides; nanostructures; sol–gel growth

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Slaughter, G.; Stevens, B. Corrosion Protection of Al/Au/ZnO Anode for Hybrid Cell Application. Membranes 2015, 5, 739-751.

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