TY - JOUR
T1 - Construction of layer-by-layer sandwiched graphene/polyaniline nanorods/carbon nanotubes heterostructures for high performance supercapacitors
AU - Liu, Panbo
AU - Yan, Jing
AU - Gao, Xiaogang
AU - Huang, Ying
AU - Zhang, Yiqing
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/5/10
Y1 - 2018/5/10
N2 - 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, N2 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.
AB - 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, N2 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.
KW - Carbon materials
KW - Layer-by-layer heterostructures
KW - Polymer
KW - Supercapacitors electrodes
UR - http://www.scopus.com/inward/record.url?scp=85044999700&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2018.03.198
DO - 10.1016/j.electacta.2018.03.198
M3 - 文章
AN - SCOPUS:85044999700
SN - 0013-4686
VL - 272
SP - 77
EP - 87
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -