Abstract
BackgroundHaemoglobin (Hb)-doped polypyrrole (PPy) composites serving as energy storage material have rarely been premeditated.MethodsIn this perspective, a novel class of haemoglobin/polypyrrole composites (HPyCs) by doping metal derivative Hb into PPy matrix with concentrations (PPy, 1%, 2% and 3% Hb in w/w) has been synthesized by cationic surfactant assisted dilute polymerization method. The obtained samples were exemplified by Fourier transform-infrared spectroscopy (FT-IR) and thermogravimetric-differential thermal analysis-differential thermogravimetry (TG-DTA-DTG). Electrochemical capacitance (Cs, F/g) of electrodes fabricated from PPy and HPyCs over stainless steel in the presence of sulphonated polysulphone as binder has been investigated in KOH solution (1.0 M) with reference to Ag/AgCl at scan rate (V/s) ranging 0.001–0.2. HPyC3% has shown Cs of 445.75F/g along with energy and power densities of 14.37 Wh/kg and 596.54 Wh/kg respectively, which is greater as compared to 200.56F/g for PPy.ConclusionThe composites show good charge-discharge with improved electrochemical cyclic stability of the HPyCs over PPy. This behaviour points out that fabricated HPyCs may dole out as prospective electrode materials for development of electrochemical supercapacitors.
Highlights
Haemoglobin (Hb)-doped polypyrrole (PPy) composites serving as energy storage material have rarely been premeditated
For further qualitative phase interaction of Hb into PPy matrix was investigated through Scanning Electron Microscope (SEM) micrograph mentioned in Additional file 1
The Fourier transform-infrared spectroscopy (FT-IR) reveals the physical interface between the two and TG-DTA-DTG informs the thermal assets of haemoglobin/polypyrrole composites (HPyCs) which get more stable with percentage of Hb
Summary
Haemoglobin (Hb)-doped polypyrrole (PPy) composites serving as energy storage material have rarely been premeditated. Work reported on V2O5 (Ingole and Lokhande 2016), FeO(OH) (Thakur and Lokhande 2018b and Fe3O4 (Thakur and Lokhande 2017b) as electrode materials deposited on stainless steel for the improvement of supercapacitance and battery applications. In this perspective, macrocyclic metal ion Hb functionalized PPy has been investigated as electrode materials in the development of high power energy storage systems
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