TY - JOUR

T1 - Effect of α-Fe2O3 nanoparticles on the mechanism of charge storage in polypyrrole-based hydrogel

AU - Vorobiov, Vitaly K.

AU - Bugrov, Alexander N.

AU - Kasatkin, Igor A.

AU - Bolshakov, Sergey A.

AU - Sokolova, Maria P.

AU - Smirnov, Nikolay N.

AU - Smirnov, Michael A.

N1 - Vorobiov, V.K., Bugrov, A.N., Kasatkin, I.A. et al. Effect of α-Fe2O3 nanoparticles on the mechanism of charge storage in polypyrrole-based hydrogel. Polym. Bull. 78, 2389–2404 (2021). https://doi.org/10.1007/s00289-020-03216-1

PY - 2021/5

Y1 - 2021/5

N2 - A hybrid hydrogel based on polypyrrole and hydrothermally prepared alpha-Fe2O3 nanoparticles was synthesized via in situ chemical polymerization of pyrrole using sodium trimetaphosphate as a crosslinker. Wide-angle X-ray diffraction study confirmed the presence of alpha-Fe2O3 in the prepared material. Mapping of the elemental composition using energy dispersive X-ray spectroscopy showed the uniform distribution of the inorganic particles inside the polypyrrole matrix. The effect of alpha-Fe2O3 on the structure of the hybrid hydrogel and on the mechanism of charge storage was studied with scanning electron microscopy, cyclic voltammetry, galvanostatic charge-discharge and impedance spectroscopy. The specific capacitance was found to increase from 250 F g(-1) for the polypyrrole hydrogel up to 509 F g(-1) for the alpha-Fe2O3-doped hydrogel at the current density of 0.2 A g(-1). The hematite incorporation also affected the morphology of the hydrogel leading to a slight increase in the double-layer capacitance accompanied with a strong increase in the pseudocapacitance: from 239 F g(-1) up to 486 F g(-1). The initial polypyrrole hydrogel and the hybrid hydrogel demonstrated a capacitance retention of about 75% and 79% after 3000 charge-discharge cycles at the current density of 4 A g(-1), respectively.

AB - A hybrid hydrogel based on polypyrrole and hydrothermally prepared alpha-Fe2O3 nanoparticles was synthesized via in situ chemical polymerization of pyrrole using sodium trimetaphosphate as a crosslinker. Wide-angle X-ray diffraction study confirmed the presence of alpha-Fe2O3 in the prepared material. Mapping of the elemental composition using energy dispersive X-ray spectroscopy showed the uniform distribution of the inorganic particles inside the polypyrrole matrix. The effect of alpha-Fe2O3 on the structure of the hybrid hydrogel and on the mechanism of charge storage was studied with scanning electron microscopy, cyclic voltammetry, galvanostatic charge-discharge and impedance spectroscopy. The specific capacitance was found to increase from 250 F g(-1) for the polypyrrole hydrogel up to 509 F g(-1) for the alpha-Fe2O3-doped hydrogel at the current density of 0.2 A g(-1). The hematite incorporation also affected the morphology of the hydrogel leading to a slight increase in the double-layer capacitance accompanied with a strong increase in the pseudocapacitance: from 239 F g(-1) up to 486 F g(-1). The initial polypyrrole hydrogel and the hybrid hydrogel demonstrated a capacitance retention of about 75% and 79% after 3000 charge-discharge cycles at the current density of 4 A g(-1), respectively.

KW - Hematite

KW - Hydrogel

KW - Hydrothermal synthesis

KW - Nanoparticles

KW - Polypyrrole

KW - Supercapacitor

KW - PERFORMANCE ELECTRODE MATERIAL

KW - OXIDE

KW - CARBON

KW - NANOSTRUCTURES

KW - SOLID-STATE SUPERCAPACITORS

KW - TERNARY COMPOSITE

KW - HYDROTHERMAL SYNTHESIS

KW - CAPACITANCE

KW - SURFACE

KW - ELECTROCHEMICAL PERFORMANCE

UR - http://www.scopus.com/inward/record.url?scp=85085081956&partnerID=8YFLogxK

U2 - 10.1007/s00289-020-03216-1

DO - 10.1007/s00289-020-03216-1

M3 - Article

AN - SCOPUS:85085081956

VL - 78

SP - 2389

EP - 2404

JO - Polymer Bulletin

JF - Polymer Bulletin

SN - 0170-0839

IS - 5

ER -