Controllable template-assisted electrodeposition of single- and multi-walled nanotube arrays for electrochemical energy storage.

ABSTRACT: Here we explored a novel ZnO nanorod array template-assisted electrodeposition route to synthesize large-scale single-walled polypyrrole (PPy) nanotube arrays (NTAs) and multi-walled MnO(2)/PPy/MnO(2) NTAs. The structures of nanotubes, such as external and inner diameters, wall thicknesses, and lengths, can be well controlled by adjusting the diameters and lengths of ZnO nanorods and deposition time. The synthesized hybrid MnO(2)/PPy/MnO(2) triple-walled nanotube arrays (TNTAs) as electrodes showed high supercapacitive perporties, excellent long-term cycling stability, and high energy and power densities. The PPy layers in MnO(2)/PPy/MnO(2) TNTAs provide reliable electrical connections to MnO(2) shells and uniquely serve as highly conductive cores to support the redox reactions in the acti

SUBMITTER: Wang ZL 

PROVIDER: S-EPMC3566116 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature