Construction of layer-by-layer sandwiched graphene/polyaniline nanorods/carbon nanotubes heterostructures for high performance supercapacitors

被引:138
|
作者
Liu, Panbo [1 ]
Yan, Jing [1 ]
Gao, Xiaogang [1 ]
Huang, Ying [1 ]
Zhang, Yiqing [1 ]
机构
[1] Northwestern Polytech Univ, Sch Sci, MOE Key Lab Mat Phys & Chem Extrodinary Condit, Xian 710129, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Layer-by-layer heterostructures; Carbon materials; Polymer; Supercapacitors electrodes; SOLID-STATE SUPERCAPACITORS; FLEXIBLE ELECTRODES; FACILE FABRICATION; TERNARY COMPOSITES; NANOPOROUS CARBON; HYBRID MATERIALS; ENERGY-STORAGE; GRAPHENE; POLYANILINE; PAPER;
D O I
10.1016/j.electacta.2018.03.198
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Integrating polyaniline (PANI) with different dimensional carbon materials is considered as a promising strategy to solve the disadvantages of PANI electrodes, such as low rate capability and poor cyclic stability. In this work, a novel layer-by-layer sandwiched graphene/PANI nanorods/carbon nanotubes (G/PANI/CNTs) heterostructure has been synthesized. The morphology of the heterostructures has been characterized by XRD, Raman spectroscopy, N-2 adsorption-desorption, XPS, FESEM and TEM. The obtained new layer-by-layer sandwiched heterostructures exhibit intimate interface contacts, fully network-structured CNTs coating, dual physical supports and synergistic effects, which can effective host the electrochemical properties of PANI with the electrolyte and restrain the volumetric changes of PANI. As a result, the electrodes exhibit high specific capacitance (638 F g(-1) at 0.5 A g(-1)), good rate capability (88.2% retention from 0.5 A g(-1) to 10 A g(-1)) and long cycle stability (93% of the initial specific capacitance after 2000 cycles) when the amount of CNTs is 2 mg. Moreover, a possible mechanism for good performance of the layer-by-layer sandwiched heterostructures has been systematically studied. We believe that this strategy will open up an avenue for the rational design of sandwich structured electrodes for high performance supercapacitors and other electronic devices. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:77 / 87
页数:11
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