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Hierarchical three-dimensional manganese doped cobalt phosphide nanowire decorated nanosheet cluster arrays for high-performance electrochemical pseudocapacitor electrodes

Abstract

Ternary metal phosphides with a self-assembled hierarchical nanostructure are promising electrode materials for energy storage and conversion, due to the unique architecture and synergistic effects in bimetallic nanostructures. In this communication, we demonstrate a hierarchical Mn-doped cobalt phosphide nanowire decorated nanosheet cluster arrays with robust adhesion on Ni foam (Mn-CoP/NF) as a bind-free electrode for supercapacitors. Such a 3D hierarchical electrode exhibits boosted areal specific capacitance over that for single metal counterpart, with the accomplishment of 8.66 F cm-2 at 1 mA cm–2. Utilizing the Mn-CoP/NF electrode as anode and activated carbon (AC) electrode as cathode, asymmetric supercapacitor (ASC) of Mn-CoP//AC attains high area capacitance of 2.05 F cm-2 at 5 mA cm-2 and high capacitance retention of 88.9% after 4000 cycles. In addition, the assembled ASC shows superior electrochemical performances with a high energy density of 35.21 Wh kg-1 at a power density of 193 W kg-1 and of 30.87 Wh kg-1 even at 1939 W kg-1.

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Publication details

The article was received on 30 Mar 2018, accepted on 07 Jul 2018 and first published on 09 Jul 2018


Article type: Communication
DOI: 10.1039/C8CC02475H
Citation: Chem. Commun., 2018, Accepted Manuscript
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    Hierarchical three-dimensional manganese doped cobalt phosphide nanowire decorated nanosheet cluster arrays for high-performance electrochemical pseudocapacitor electrodes

    G. Zhu, L. Yang, W. Wang, M. Ma, J. Zhang, H. Wen, D. Zheng and Y. Yao, Chem. Commun., 2018, Accepted Manuscript , DOI: 10.1039/C8CC02475H

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