Abstract
We demonstrate a novel approach for the preparation of layered Polyaniline–polypyrrole (PANI–PPy) nanocomposite via simplest oxidative chemical polymerization. The approach is conceptualized on the basis of the electrostatic interactions between cationic source (aniline/pyrrole with H2SO4) and anionic source (ammonium persulfate) in double distilled water. The investigation describes advantages of facile successive ionic layer adsorption and reaction (SILAR) for depositing nanograined PANI–PPy thin film onto cost-effective large area stainless steel substrates. The physico-chemical characteristics of deposited films are studied via analysis of structural, morphological, surface wettability and Brunauer–Emmett–Teller (BET) analysis. A PANI–PPy nanocomposite prepared from this approach exhibited an excellent electro-capacitive performance with a high specific capacitance over 737F/g at 5mVs−1 scan rate. Impedance measurements suggest that the nanograined PANI–PPy electrodes are promising for the next generation high performance electrochemical supercapacitors. The simple method described here opens up a generalized route to make a wide range of PANI–PPy based nanocomposite materials for applications beyond electrochemical energy storage.
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