Preparation oaf polyaniline/diazonium salt/TiO2 nanotube arrays as supercapacitor electrode by electrochemical grafting and deposition

被引:0
|
作者
Qinlei Chen
Zhengbin Xia
Yanhong Zhang
Shumin Wang
机构
[1] South China University of Technology,School of Chemistry and Chemical Engineering
来源
Journal of Solid State Electrochemistry | 2019年 / 23卷
关键词
Titanium dioxide nanotube arrays; Diazonium salts; Polyaniline; Electrochemical performance; Supercapacitor;
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学科分类号
摘要
Polyaniline/diazonium salt/TiO2 nanotube arrays (PANI/DZ/TiO2 NAs), as a supercapacitor electrode material, are fabricated by two-step anodic oxidation of titanium foils, electrochemical grafting and reduction of diazonium salts, and electrochemical deposition of polyaniline. Surface morphology, crystallization, and chemical compositions of nanocomposites are characterized by SEM, EDX, XRD, and Raman. Electrochemical tests indicate that PANI/DZ/TiO2 NAs have excellent capacitance of 1108.5 F g−1 when the current density is 0.6 A g−1. With the current density increasing 20 times to 12 A g−1, the capacitance remains about 77.5%, demonstrating its good rate performance. Moreover, after 2000 charge–discharge cycles at 12 A g−1, the capacitance retains 83.7% of the initial value, showing its good cycling stability.
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页码:3399 / 3408
页数:9
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