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Crystals 2019, 9(1), 47;

Research on the High-Performance Electrochemical Energy Storage of a [email protected] (NZO) Hybrid Based on Growth Time

School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China
College Key Laboratory Automotive Transportation Safety Technology Ministry of Communication, Chang’an University, Xi’an 710064, China
Author to whom correspondence should be addressed.
Received: 14 December 2018 / Revised: 11 January 2019 / Accepted: 11 January 2019 / Published: 16 January 2019
(This article belongs to the Special Issue Functional Oxide Based Thin-Film Materials)
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A [email protected] (NZO) hybrid with different reaction times was successfully synthesized by a green hydrothermal method. After comparison, it was found that hydrothermal time had a great impact on specific capacitance. As a supercapacitor electrode of NZO-12h, it exhibited the maximum reversible specific capacitance of 985.0 F/g (3.94 F/cm2) at 5 mA/cm2 and 587.5 F/g (2.35 F/cm2) at 50 mA/cm2, as well as a high retention of 74.9% capacitance after 1500 cycles at 20 mA/cm2. Furthermore, the asymmetric electrode device with ZnO-12h and activated carbon (AC) as the positive and negative electrodes was successfully assembled. In addition, the device exhibited a specific capacitance of 85.7 F/g at 0.4 A/g. Moreover, the highest energy density of 27.13 Wh kg−1 was obtained at a power density of 321.42 W kg−1. These desirable electrochemical properties demonstrate that the NZO hybrid is a promising electrode material for a supercapacitor. View Full-Text
Keywords: [email protected]; electrochemical performance; supercapacitor [email protected]; electrochemical performance; supercapacitor

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Zheng, J.; Zhang, R.; Cheng, K.; Xu, Z.; Yu, P.; Wang, X.; Niu, S. Research on the High-Performance Electrochemical Energy Storage of a [email protected] (NZO) Hybrid Based on Growth Time. Crystals 2019, 9, 47.

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