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    Hierarchical ZnO@MnO2 Core-Shell Pillar Arrays on Ni Foam for Binder-Free Supercapacitor Electrodes

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    Type
    Article
    Authors
    Huang, Ming
    Li, Fei
    Zhao, Xiao Li
    Luo, Da
    You, Xue Qiu
    Zhang, Yu Xin
    Li, Gang
    Date
    2015-01
    Permanent link to this record
    http://hdl.handle.net/10754/598459
    
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    Abstract
    © 2014 Elsevier Ltd. All rights reserved. Hierarchical ZnO@MnO2 core-shell pillar arrays on Ni foam have been fabricated by a facile two-step hydrothermal approach and further investigated as the binder-free electrode for supercapacitors. The core-shell hybrid nanostructure is achieved by decorating ultrathin self-standing MnO2 nanosheets on ZnO pillar arrays grown radically on Nickel foam. This unique well-designed binder-free electrode exhibits a high specific capacitance (423.5 F g-1 at a current density of 0.5 A g-1), and excellent cycling stability (92% capacitance retention after 3000 cycles). The improved electrochemical results show that the ZnO@MnO2 core-shell nanostructure electrode is promising for high-performance supercapacitors. The facile design of the unique core-shell array architectures provides a new and effective approach to fabricate high-performance binder-free electrode for supercapacitors.
    Citation
    Huang M, Li F, Zhao XL, Luo D, You XQ, et al. (2015) Hierarchical ZnO@MnO2 Core-Shell Pillar Arrays on Ni Foam for Binder-Free Supercapacitor Electrodes. Electrochimica Acta 152: 172–177. Available: http://dx.doi.org/10.1016/j.electacta.2014.11.127.
    Sponsors
    The authors gratefully acknowledge the financial supports provided by National Natural Science Foundation of China (Grant no. 51104194 and 51104121), National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology (2013MS06, Chongqing University) and Fundamental Research Funds for the Central Universities (Project no. CDJZR14135501, Chongqing University, PR China).The authors acknowledge sincere discussion and suggestions by Prof. Hongjin Fan in NTU, Singapore. The authors acknowledge support on electrochemical characterization by Dr. Kexin Yao in King Abdullah University of Science and Technology, Saudi Arabia.
    Publisher
    Elsevier BV
    Journal
    Electrochimica Acta
    DOI
    10.1016/j.electacta.2014.11.127
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.electacta.2014.11.127
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