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High‐Performance Mesostructured Organic Hybrid Pseudocapacitor Electrodes
Author(s) -
Kim SungKon,
Cho Jiung,
Moore Jeffrey S.,
Park Ho Seok,
Braun Paul V.
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201504307
Subject(s) - materials science , pseudocapacitor , electrode , polypyrrole , hydroquinone , electrosynthesis , capacitance , nanotechnology , polymer , chemical engineering , electrochemistry , redox , quinone , colloidal crystal , electron transfer , supercapacitor , polymerization , colloid , photochemistry , organic chemistry , composite material , chemistry , engineering , metallurgy
The electrodes of a hybrid electrochemical capacitor which utilize the quinone (Q)‐hydroquinone (QH 2 ) couple, a prototypical organic redox system known to provide fast and reversible proton‐coupled electron‐transfer reactions, are deterministically mesostructured via a colloidal templating strategy to provide good ion and electron transport pathways, enabling a high rate performance. Specifically, a conducting polymer, polypyrrole (PPy), is functionalized with a pseudocapacitive material, a Q/QH 2 ‐containing catechol derivative, by noncovalent interactions. The mesostructure of this hybrid material is formed into an ordered 3D porous structure by a polystyrene colloidal crystal template‐assisted electrosynthesis. The catechol derivative is sufficiently bound to the PPy through noncovalent interactions to provide a volumetric capacitance as high as ≈130 F cm −3 and a capacitance retention of ≈75% over 10 000 charging/discharging cycles. When compared with a randomly structured electrode, the deterministically structured electrode exhibits an improved rate performance due to the mesostructure facilitated electron and ion transport.