NDLI: Hierarchical 3D Co3O4@MnO2 core/shell nanoconch arrays on Ni foam for enhanced electrochemical performance

Content Provider	Springer Nature Link
Author	Qiu, Kangwen Yan, Hailong Zhang, Deyang Lu, Yang Cheng, Jinbing Lu, Min Wang, Chunlei Zhang, Yihe Liu, Xianming Luo, Yongsong
Copyright Year	2014
Abstract	In this work, we developed a novel three-dimensional (3D) core/shell Co3O4@MnO2 nanoconch arrays by a facile, stepwise hydrothermal approach. Core–shell Co3O4@MnO2 nanoconches were directly grown on a Ni current collector as an integrated electrode/collector. The electrochemical storage properties of as-prepared Co3O4@MnO2 hierarchical structure are investigated by testing them as anodes for both supercapacitors and Li-ion batteries. This unique 3D Co3O4/MnO2 hierarchical structure with enhanced active surface area provides a better interfacial/chemical distribution at the nanoscale, fast ion and electron transfer, and good strain accommodation. Thus, it has shown excellent electrochemical performances when it is used for supercapacitor, such as high specific capacitances 1,183.7 F g−1 at a current density of 1 A g−1 and long-term cycling stability (~92.5 % of capacitance retention up 3,000 cycles at 1 A g−1), which are better than that of the individual component of Co3O4 nanoconch arrays and MnO2 nanosheet arrays. The Co3O4@MnO2 core/shell nanoconch arrays are also tested as anode material for lithium-ion batteries, which also presents a high reversible capacity of 925 mAh g−1 at a rate of 120 mA g−1, good cycling stability, and rate capability.
Starting Page	391
Ending Page	401
Page Count	11
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	19
Issue Number	2
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-08-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Supercapacitor Lithium-ion battery Conch-like Cobalt Manganese Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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