The effect of 3-amino benzoic acid linker and the reversal of donor–acceptor pairs on the electrochemical performance and stability of covalently bonded poly(pyrrole) nanotubes
The effect of 3-amino benzoic acid linker and the reversal of donor–acceptor pairs on the electrochemical performance and stability of covalently bonded poly(pyrrole) nanotubes
复制标题
3-氨基苯甲酸连接体和供体-受体对的反转对共价键合聚吡咯纳米管电化学性能和稳定性的影响
DOI：
10.1016/j.polymer.2015.09.041
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发表时间：
2015
期刊：
影响因子：
4.6
通讯作者：
A. Ignaszak
中科院分区：
文献类型：
--
作者：
Mariusz Radtke;D. G. McMillan;B. Schröter;S. Höppener;B. Dietzek;U. Schubert;A. Ignaszak
多壁碳纳米管-聚吡咯（MWCNTs-PPy）复合材料是一种众所周知的适用于储能应用如电容器的杂化材料。由于碳-PPy系统的电化学活性和长期稳定性对于它们的应用是至关重要的，因此我们研究了PPy通过3-阿坝连接体与MWCNTs接枝的效果，其与供体-受体对的偏好以及耐久性有关。X射线光电子能谱研究表明，碳原子和聚合物之间存在电子相互作用（π−π* 堆积），同时由于化学键的作用，碳原子和O原子羰基信号的结合能发生了变化。电容器电极的循环伏安法和恒电流充放电研究揭示了聚合物与氯化物的反向掺杂的效果，以及双电层电容（MWCNTs）和聚（吡咯）的赝电容的协同作用。阻抗谱研究证实，与裸聚合物（在0.58 V下降解）相比，复合材料（稳定至1.2 V）的电化学稳定性得到改善。
The multiwall carbon nanotubes-polypyrrole (MWCNTs-PPy) composite is a well-known hybrid material suitable for energy storage applications such as capacitors. Since the electrochemical activity, and long-term stability of carbon-PPy systems are critical for their application, we examined the effect of grafting PPyviaa 3-ABA linker with MWCNTs with respect to the preference of the donor–acceptor pairs, and furthermore, the durability. X-ray photoelectron spectroscopy studies of C 1s and O 1s signals reveal the electronic interaction between carbon and polymer (π−π* stacking), as well as a binding energy shift for C 1s and O 1s carbonyl signals due to the chemical bondingviathe electron donating linker and grafted polymer. Cyclic voltammetry and galvanostatic charge–discharge studies of the capacitor electrode reveal the effect of the reversal doping of the polymer with chloride, as well as the synergy of double layer capacitance (MWCNTs) and pseudo-capacitance of the poly(pyrrole). Impedance spectroscopy studies confirm the improved electrochemical stability for the composite (stable until 1.2 V) in comparison to the bare polymer (degradation at 0.58 V).