Synthesis of petal-like carbon nanocapsule@MnO2 core-shell particles and their application in supercapacitors

Ting Ting Lee, Jing Ru Hong, Wei Chen Lin, Chi Chang Hu, Chi Chang Wu, Yuan Yao Li

Research output: Contribution to journalArticle

Abstract

Carbon nanocapule (CNC)@MnO2 core-shell particles are prepared with a reaction of KMnO4 with CNC at 90°C. Birnessite-type MnO2 nanoflakes are grown on CNC seeds, resulting in CNC@MnO2 particles with a petal-like structure. The electrochemical characteristics of the prepared materials show that the highest specific capacitance (163 Fg-1) was obtained with a scan rate of 2 mVs-1 in 1 M Na2SO 4. In addition, the synthesized material has superior cycling stability. The capacitance retains 97.8% of itsinitial value after 5000 cycles with a scan rate of 100 mVs-1.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume161
Issue number10
DOIs
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

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