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Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo2O4) supercapacitor applications

机译:纳米板镍钴罐(NiCO2O4)超级涂物应用的增强电化学性能

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摘要

Well-ordered, unique interconnected nanostructured binary metal oxides with lightweight, free-standing, and highly flexible nickel foam substrate electrodes have attracted tremendous research attention for high performance supercapacitor applications owing to the combination of the improved electrical conductivity and highly efficient electron and ion transport channels. In this study, a unique interconnected nanoplate-like nickel cobaltite (NiCo2O4) nanostructure was synthesized on highly conductive nickel foam and its use as a binder-free material in energy storage applications was assessed. The nanoplate-like NiCo2O4 nanostructure electrode was prepared by a simple chemical bath deposition method under optimized conditions. The NiCo2O4 electrode delivered an outstanding specific capacitance of 2791 F g(-1) at a current density of 5 A g(-1) in a KOH electrolyte in a three-electrode system as well as outstanding cycling stability with 99.1% retention after 3000 cycles at a current density of 7 A g(-1). The as-synthesized NiCo2O4 electrode had a maximum energy density of 63.8 W h kg(-1) and exhibited an outstanding high power density of approximately 654 W h kg(-1). This paper reports a simple and cost-effective process for the synthesis of flexible high performance devices that may inspire new ideas for energy storage applications.
机译:具有轻质,独立的独特型纳米结构二元金属氧化物,具有轻质,独立和高度柔软的镍泡沫基板电极对高性能超级电容器应用引起了高性能超级电容器应用的巨大互联网电极,这是由于改进的导电性和高效电子和离子运输渠道。在该研究中,在高导电镍泡沫上合成了独特的互连纳米片状镍钴沸石(NicO 2 O 4)纳米结构,并评估其作为无粘合剂材料的用途。通过在优化条件下通过简单的化学浴沉积方法制备纳米层状的NicO2O4纳米结构电极。 NicO2O4电极以三电极系统的KOH电解质中的5A g(-1)的电流密度为2791f g(-1)的出色的特定电容,以及3000后的99.1%的循环稳定性电流密度为7Ag(-1)的循环。作为合成的NicO2O4电极的最大能量密度为63.8WH kg(-1),并且表现出大约654Wh kg(-1)的优异高功率密度。本文报告了一种简单且具有成本效益的过程,可为灵活的高性能设备合成,这可能会激发能量存储应用的新思路。

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  • 来源
    《RSC Advances》 |2019年第2期|共8页
  • 作者

    Yedluri Anil Kumar; Kim Hee-Je;

  • 作者单位

    Pusan Natl Univ Sch Elect Engn Busandaehak Ro 63beon Gil Busan 46241 South Korea;

    Pusan Natl Univ Sch Elect Engn Busandaehak Ro 63beon Gil Busan 46241 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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