Journal of Materials Science

, Volume 52, Issue 9, pp 4852–4865

Facile synthesis of iron-doped hollow urchin-like MnO2 for supercapacitors

Original Paper

DOI: 10.1007/s10853-016-0720-z

Cite this article as:
Li, Z., Gu, A., Lou, Z. et al. J Mater Sci (2017) 52: 4852. doi:10.1007/s10853-016-0720-z
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Abstract

Hollow urchin-like iron-doped manganese dioxide (Fe–MnO2) architectures were successfully prepared without any template or surfactant via a facile one-step hydrothermal route. Hollow urchin-like Fe–MnO2 architectures were made up of interleaving nanosheets, resulting in porous structures and high specific surface area. The formation mechanism of hollow urchin-like Fe–MnO2 architectures was proposed based on the Ostwald ripening process. When employed as supercapacitor electrode material, hollow urchin-like Fe–MnO2 delivered a specific capacitance of 203.3 F g−1 at 250 mA g−1 as well as a good capacity retention of 88.1% after 1000 cycles at 5 A g−1. Coupled with activated carbon (AC) negative electrode, Fe–MnO2//AC asymmetric supercapacitor (Fe–MnO2//AC ASC) achieved an energy density of 20.2 Wh kg−1 at a power density of 225 W kg−1 and 83.8% capacity retention after 1000 cycles at 3 A g−1, suggesting its potential applications for energy storage.

Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.School of Chemistry and Environmental EngineeringJiangsu Teachers University of TechnologyChangzhouPeople’s Republic of China
  2. 2.Department of ChemistryThe University of Hong KongHong Kong SARChina