Layer-by-layer assembled polyaniline nanofiber/multiwall carbon nanotube thin film electrodes for high-power and high-energy storage applications

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Hyder, Md Nasim and Lee, Seung Woo and Cebeci, Fevzi Çakmak and Schmidt, Daniel J. and Shao-Horn, Yang and Hammond, Paula T. (2011) Layer-by-layer assembled polyaniline nanofiber/multiwall carbon nanotube thin film electrodes for high-power and high-energy storage applications. Acs Nano, 5 (11). pp. 8552-8561. ISSN 1936-0851 (Print) 1936-086X (Online)

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Abstract

Thin film electrodes of polyaniline (PANi) nanofibers and functionalized multiwall carbon nanotubes (MWNTs) are created by layer-by-layer (LbL) assembly for microbatteries or - electrochemical capacitors. Highly stable cationic PANi nanofibers, synthesized from the rapid aqueous phase polymerization of aniline, are assembled with carboxylic acid functionalized MWNT into LbL films. The pH-dependent surface charge of PANi nanofibers and MWNTs allows the system to behave like weak polyelectrolytes with controllable LbL film thickness and morphology by varying the number of bilayers. The LbL-PANi/MWNT films consist of a nanoscale interpenetrating network structure with well developed nanopores that yield excellent electrochemical performance for energy storage applications. These LbL-PANi/MWNT films in lithium cell can store high volumetric capacitance (∼238 ( 32 F/cm3) and high volumetric capacity (∼210 mAh/cm3). In addition, ratedependent galvanostatic tests show LbL-PANi/MWNT films can deliver both high power and high energy density (∼220 Wh/Lelectrode at∼100 kW/Lelectrode) and could be promising positive electrode materials for thin film microbatteries or electrochemical capacitors.
Item Type: Article
Uncontrolled Keywords: polyaniline; carbon nanotubes; layer-by-layer assembly; nanostructured electrodes; lithium-ion batteries; electrochemical capacitors
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Fevzi Çakmak Cebeci
Date Deposited: 03 Jan 2012 11:42
Last Modified: 30 Jul 2019 15:18
URI: https://research.sabanciuniv.edu/id/eprint/17709

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