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Issue 12, 2017
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Remarkable electrochemical properties of novel LaNi0.5Co0.5O3/0.333Co3O4 hollow spheres with a mesoporous shell

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Abstract

An atomization route incorporating colloidal silica as a template was employed to synthesize LaNi0.5Co0.5O3/0.333Co3O4 (LNCO/CO) hollow spheres with a highly mesoporous shell. XRD and FESEM and HRTEM were used to characterize the crystalline phases and micro-morphology, respectively. The mesoporous shell showed a high specific surface area of 247 m2 g−1 as well as a mean pore size of about 2.53 nm as determined from N2 adsorption–desorption isotherms. The as-obtained spherical hollow spheres exhibited remarkable electrochemical performance as a battery-type electrode material with a maximum specific capacity of 498C g−1 at a current density of 2 A g−1 and ultra-long charge–discharge stability for 50 000 cycles in a three-electrode system. Additionally, a hybrid supercapacitor assembled with LNCO/CO hollow spheres as the positive electrode and N-doped mesoporous carbon as the negative electrode showed a high specific capacitance of 113.2 F g−1 at 1 A g−1 and a very high energy density of 42.8 Wh kg−1 at a power density of 424 W kg−1. The hybrid supercapacitor also exhibited a long-term cycle life of up to 30 000 cycles with a specific capacitance retention of 90.4%, and these properties meet the growing demands of long-life energy-related devices.

Graphical abstract: Remarkable electrochemical properties of novel LaNi0.5Co0.5O3/0.333Co3O4 hollow spheres with a mesoporous shell

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Publication details

The article was received on 12 Jan 2017, accepted on 21 Feb 2017 and first published on 21 Feb 2017


Article type: Paper
DOI: 10.1039/C7TA00395A
Citation: J. Mater. Chem. A, 2017,5, 5838-5845
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    Remarkable electrochemical properties of novel LaNi0.5Co0.5O3/0.333Co3O4 hollow spheres with a mesoporous shell

    N. Wang, M. Yao, P. Zhao, W. Hu and S. Komarneni, J. Mater. Chem. A, 2017, 5, 5838
    DOI: 10.1039/C7TA00395A

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