Synthesis of polyaniline-titania nanotube arrays hybrid composite via self-assembling and graft polymerization for supercapacitor application

详细信息    查看全文

• 作者：Shuang Xie ; Mengyu Gan ; Li Ma ; ^{mlsys607@126.com" class="auth_mail} ; Zhitao Li ; Jun Yan ; Hui Yin ; Xiaoyu Shen ; Fenfang Xu ; Jiyue Zheng ; Jun Zhang ; Jinlong Hu
• 关键词：Titania nanotubes array ; Polyaniline ; 纬-aminopropyltriethoxysilane ; Supercapacitor
• 刊名：Electrochimica Acta
• 出版年：20 February, 2014
• 年：2014
• 卷：120
• 期：Complete
• 页码：408-415
• 全文大小：2739 K

文摘

In this work, polyaniline-纬-aminopropyltriethoxysilane-titania nanotube arrays (PANI-APTES-TiO₂ NTA) nanocomposite was synthesized through a graft polymerization of PANI on the surface of the self-assembled monolayer (SAM) coated TiO₂ NTA, after anodized TiO₂ NTA was modified by APTES. The morphology and structure of nanocomposite was characterized by FESEM and FTIR, respectively, and its electrochemical performance was measured by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge. The microstructure of PANI-APTES-TiO₂ NTA could be clearly observed that PANI nanowires grew vertically from inside of TiO₂ NTA. PANI-APTES-TiO₂ NTA PANI-APTES-TiO₂ NTA showed better electrochemical behavior than that of PANI-TiO₂ NTA. The maximum specific capacitance of PANI-APTES-TiO₂ NTA was 380 F g^鈭? at current density of 0.5 A g^鈭?, which specific capacitance retention ratio was circa 74.4% when the current density was increased by 20 times. After constant charge-discharge 1000 cycles, the specific capacitance of the PANI-APTES-TiO₂ NTA retained 90.5% of the initial specific capacitance at current density of 5 A g^鈭?. The good electrochemical performance was attributed to the anchoring function of APTES and support of TiO₂ NTA.