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Constructing Hierarchical Tectorum‐like α‐Fe2O3/PPy Nanoarrays on Carbon Cloth for Solid‐State Asymmetric Supercapacitors

Abstract

The design of complex heterostructured electrode materials that deliver superior electrochemical performances to their individual counterparts has stimulated intensive research on configuring supercapacitors with high energy and power densities. Herein we fabricate hierarchical tectorum‐like α‐Fe2O3/polypyrrole (PPy) nanoarrays (T‐Fe2O3/PPy NAs). The 3D, and interconnected T‐Fe2O3/PPy NAs are successfully grown on conductive carbon cloth through an easy self‐sacrificing template and in situ vapor‐phase polymerization route under mild conditions. The electrode made of the T‐Fe2O3/PPy NAs exhibits a high areal capacitance of 382.4 mF cm−2 at a current density of 0.5 mA cm−2 and excellent reversibility. The solid‐state asymmetric supercapacitor consisting of T‐Fe2O3/PPy NAs and MnO2 electrodes achieves a high energy density of 0.22 mWh cm−3 at a power density of 165.6 mW cm−3.

High‐Tec: Hierarchische Tectorum/Stachelpflanzen‐ähnliche Fe2O3/Polypyrrol(PPy)‐Nanostrukturen auf leitfähigem Kohlegewebe erzielen hohe Energie‐ und Leistungsdichten als Elektroden in asymmetrischen Festkörper‐Superkondensatoren. Die Systeme zeichnen sich durch eine hohe Kapazität und Stromdichte und exzellente Reversibilität aus.

Authors:   Libin Wang, Huiling Yang, Xiaoxiao Liu, Rui Zeng, Ming Li, Yunhui Huang, Xianluo Hu
Journal:   Angewandte Chemie
Year:   2016
Pages:   n/a
DOI:   10.1002/ange.201609527
Publication date:   21-Dec-2016
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