TY - JOUR
T1 - Morphology-dependent enhancement of the pseudocapacitance of template-guided tunable polyaniline nanostructures
AU - Chen, Wei
AU - Baby, Rakhi Raghavan
AU - Alshareef, Husam N.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank Olga Zausalina for the graphical illustration design. W.C. acknowledges support from the KAUST Graduate Fellowship. R.B.R. acknowledges support from SABIC Postdoctoral Fellowship. HA acknowledges the support from the KAUST baseline fund.
PY - 2013/7/12
Y1 - 2013/7/12
N2 - Polyaniline is one of the most investigated conducting polymers as supercapacitor material for energy storage applications. The preparation of nanostructured polyaniline with well-controlled morphology is crucial to obtaining good supercapacitor performance. We present here a facile chemical process to produce polyaniline nanostructures with three different morphologies (i.e., nanofibers, nanospheres, and nanotubes) by utilizing the corresponding tunable morphology of MnO2 reactive templates. A growth mechanism is proposed to explain the evolution of polyaniline morphology based on the reactive templates. The morphology-induced improvement in the electrochemical performance of polyaniline pseudocapacitors is as large as 51% due to the much enhanced surface area and the porous nature of the template-guided polyaniline nanostructures. In addition, and for the first time, a redox-active electrolyte is applied to the polyaniline pseudocapacitors to achieve significant enhancement of pseudocapacitance. Compared to the conventional electrolyte, the enhancement of pseudocapacitance in the redox-active electrolyte is 49%-78%, depending on the specific polyaniline morphology, reaching the highest reported capacitance of 896 F/g for polyaniline full cells so far. © 2013 American Chemical Society.
AB - Polyaniline is one of the most investigated conducting polymers as supercapacitor material for energy storage applications. The preparation of nanostructured polyaniline with well-controlled morphology is crucial to obtaining good supercapacitor performance. We present here a facile chemical process to produce polyaniline nanostructures with three different morphologies (i.e., nanofibers, nanospheres, and nanotubes) by utilizing the corresponding tunable morphology of MnO2 reactive templates. A growth mechanism is proposed to explain the evolution of polyaniline morphology based on the reactive templates. The morphology-induced improvement in the electrochemical performance of polyaniline pseudocapacitors is as large as 51% due to the much enhanced surface area and the porous nature of the template-guided polyaniline nanostructures. In addition, and for the first time, a redox-active electrolyte is applied to the polyaniline pseudocapacitors to achieve significant enhancement of pseudocapacitance. Compared to the conventional electrolyte, the enhancement of pseudocapacitance in the redox-active electrolyte is 49%-78%, depending on the specific polyaniline morphology, reaching the highest reported capacitance of 896 F/g for polyaniline full cells so far. © 2013 American Chemical Society.
UR - http://hdl.handle.net/10754/562873
UR - https://pubs.acs.org/doi/10.1021/jp405300p
UR - http://www.scopus.com/inward/record.url?scp=84880848797&partnerID=8YFLogxK
U2 - 10.1021/jp405300p
DO - 10.1021/jp405300p
M3 - Article
SN - 1932-7447
VL - 117
SP - 15009
EP - 15019
JO - The Journal of Physical Chemistry C
JF - The Journal of Physical Chemistry C
IS - 29
ER -