纳米片
超级电容器
电极
材料科学
电容
电流密度
集电器
纳米技术
储能
镍
氧化物
化学工程
光电子学
冶金
化学
功率(物理)
物理
物理化学
量子力学
电解质
工程类
作者
Qasim Abbas,Sajid Hussain Siyal,Abdul Mateen,Majed A. Bajaber,Awais Ahmad,Muhammad Sufyan Javed,Patrick Martin,Nicolas Joly,Patrizia Bocchetta
出处
期刊:Molecules
[MDPI AG]
日期:2022-07-29
卷期号:27 (15): 4850-4850
被引量:3
标识
DOI:10.3390/molecules27154850
摘要
Scientific research is being compelled to develop highly efficient and cost-effective energy-storing devices such as supercapacitors (SCs). The practical use of SC devices is hindered by their low energy density and poor rate capability due to the binding agents in fabricating electrodes. Herein, we proposed flower-like highly open-structured binder-free ZnCo2O4 micro-flowers composed of nanosheets supported in nickel foam (ZnCoO@NF) with improved rate capability up to 91.8% when current varied from 2 to 20 A·g−1. The ZnCoO@NF electrode exhibited a superior specific capacitance of 1132 F·g−1 at 2 A·g−1 and revealed 99% cycling stability after 7000 cycles at a high current density of 20 A·g−1. The improved performance of the ZnCoO@NF electrode is attributed to the highly stable structure of the micro/nano-multiscale architecture, which provides both the high conduction of electrons and fast ionic transportation paths simultaneously.
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