Merging of kirkendall growth and ostwald ripening: CuO@MnO2 core-shell architectures for asymmetric supercapacitors

Ming Huang, Yuxin Zhang, Fei Li, Zhongchang Wang, Alamusi, Ning Hu, Zhiyu Wen, Qing Liu

Research output: Contribution to journalArticle

186 Citations (Scopus)

Abstract

Fabricating hierarchical core-shell nanostructures is currently the subject of intensive research in the electrochemical field owing to the hopes it raises for making efficient electrodes for high-performance supercapacitors. Here, we develop a simple and cost-effective approach to prepare CuO@MnO2 core-shell nanostructures without any surfactants and report their applications as electrodes for supercapacitors. An asymmetric supercapacitor with CuO@MnO2 core-shell nanostructure as the positive electrode and activated microwave exfoliated graphite oxide (MEGO) as the negative electrode yields an energy density of 22.1 Whkg -1 and a maximum power density of 85.6 kWk g-1 the device shows a long-term cycling stability which retains 101.5% of its initial capacitance even after 10000 cycles. Such a facile strategy to fabricate the hierarchical CuO@MnO2 core-shell nanostructure with significantly improved functionalities opens up a novel avenue to design electrode materials on demand for high-performance supercapacitor applications.

Original languageEnglish
Article number4518
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 2014 Mar 31
Externally publishedYes

ASJC Scopus subject areas

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