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Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
Published on: November 5, 2014
Uniformly embedded metal oxide nanoparticles in vertically aligned carbon nanotube forests as pseudocapacitor
Yingqi Jiang1, Pengbo Wang, Xining Zang
1Berkeley Sensor and Actuator Center, Department of Mechanical Engineering, University of California, Berkeley, California 94720, United States. jiangyq99@gmail.com
Abstract:
Carbon nanotube (CNT) forests were grown directly on a silicon substrate using a Fe/Al/Mo stacking layer which functioned as both the catalyst material and subsequently a conductive current collecting layer in pseudocapacitor applications. A vacuum-assisted, in situ electrodeposition process has been used to achieve the three-dimensional functionalization of CNT forests with inserted nickel nanoparticles as pseudocapacitor electrodes. Experimental results have shown the measured specific capacitance of 1.26 F/cm(3), which is 5.7 times higher than pure CNT forest samples, and the oxidized nickel nanoparticle/CNT supercapacitor retained 94.2% of its initial capacitance after 10,000 cyclic voltammetry tests.
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