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Potential‐modulated Electrocapacitive Properties of Soft Microstructured Polypyrrole
Author(s) -
Vagin Mikhail Yu.,
Wannapob Rodtichoti,
Liu Yu,
Mak Wing Cheung
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201600261
Subject(s) - materials science , polypyrrole , electrode , diffusion , horizontal scan rate , electrochemistry , kinetics , porosity , nanotechnology , chemical engineering , composite material , cyclic voltammetry , chemistry , physics , quantum mechanics , engineering , thermodynamics
Microstructured materials are becoming important for high performance electrochemical device especially for energy storage due to their advantageous diffusion and flux properties. Utilizing a rationally designed hollow structured polypyrrole microparticles (PPyMPs) with controllable wall thicknesses of ∼110 to 340 nm, we observed a significant morphological effect on electrocapacitive kinetics of the PPyMPs modulated by the voltammetric potential window and scan rate. The thin‐hollow architecture of PPyMPs revealed significant enhancement of charge storage performance (up to 447 %), high retention at high scan rate and faster charge/discharge kinetics compared to the thick‐hollow PPyMPs due to the larger accessible surface area and decrease of diffusion length. These findings demonstrated the electrocapacitive kinetics performance of microstructured soft materials related to morphological effect modulated by operational conditions. Our study provides new insight on electrochemistry of soft electrode materials with controlled nanostructured morphology for understanding the mechanism of charge insertion and mass diffusion for the future development of high performance porous electrode material.