Synthesis of Cobaltous Nickel Oxide Core/Shell Nanowires for Supercapacitors

被引：0

作者：

机构：

[1] [1,Xing, Fangkai

[2] Ren, Haoqi

[3] Ji, Chenchen

[4] Zhang, Yuanping

[5] Yang, Shengchun

来源：

Ji, Chenchen (jichenchen2013@stu.xjtu.edu.cn) | 2017年 / Science Press卷 / 46期

基金：

中国国家自然科学基金;

关键词：

Nickel oxide - Capacitance - High resolution transmission electron microscopy - Nanowires - Supercapacitor;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

CoO/NiO core/shell nanowires (NWs) were synthesized using an efficient two-step approach. The detailed structural analysis through the transmission electron microscopy indicate that the CoO NW core is well enclosed by the NiO nanoflake shell with an unique nanoporous structure. Due to these structural advantages, when the obtained CoO/NiO core/shell NW material is used as a supercapacitor electrode, it presents a much enhanced capacitance (708 F·g-1 at 1 A·g-1), better rate capability and excellent cycling performance (>80 % capacitance retention for 1000 cycles) compared with the single component samples. Besides, the synergetic interaction between the CoO NWs and NiO nanoflakes can produce more active sites for redox progresses than single material during the electrochemical reaction, which can provide synergistic effect to the capacitance and electrochemical stability. Copyright © 2017, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.

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