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High-performance asymmetric supercapacitors based on monodisperse MnO nanocrystals with high energy densities

Abstract

The monodisperse spherical MnO nanocrystals (NCs) with a size of 22.5 nm were synthesized by the thermal decomposition of manganese oleate in the present of oleic acid and 1-octadecene. The as-synthesized MnO NCs show the superior electrochemical performances with a specific capacitance of 736.4 F g-1 at a current density of 1 A g-1 and retains 93.3% of initial specific capacitance after 5000 cycles. The MnO NCs electrode was successfully assembled in an asymmetric supercapacitor as cathode with an activated carbon (AC) electrode as anode. The as-fabricated device can demonstrate remarkable performance with an energy density of 44.2 W h kg-1, power density of 900 W kg-1, and excellent cycling stability. This work provides a new direction for MnO nanomaterials towards high-performance energy storage devices.

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Publication details

The article was received on 04 Jun 2018, accepted on 09 Aug 2018 and first published on 10 Aug 2018


Article type: Communication
DOI: 10.1039/C8NR04541K
Citation: Nanoscale, 2018, Accepted Manuscript
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    High-performance asymmetric supercapacitors based on monodisperse MnO nanocrystals with high energy densities

    M. Li, W. Lei, Y. Yu, W. Yang, J. Li, D. Chen, S. Xu, M. Feng and H. Li, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR04541K

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