Potassium citrate-derived carbon nanosheets/carbon nanotubes/polyaniline ternary composite for supercapacitor electrodes
Electrochimica Acta, ISSN: 0013-4686, Vol: 403, Page: 139571
2022
- 23Citations
- 18Captures
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Article Description
To improve the electrochemical performance of potassium citrate-derived carbon nanosheets (PC Cs), herein, bamboo-like carbon nanotubes (CNTs) are generated on PC Cs to prepare PC Cs/CNTs composite. Based on interconnected porous PC Cs/CNTs, polyaniline (PANI) is in-situ polymerized to fabricate PC Cs/CNTs/PANI ternary composite. Through adjusting the aniline concentration, the optimized PC Cs/CNTs/PANI composite is obtained at the aniline concentration of 0.4 M. The result confirms that much more N-containing groups are introduced after growing PANI on PC CS/CNTs, and the diameter of PANI-wrapped CNT is about three-time thicker than that of CNT. Served as working electrode in three-electrode system, the optimized PC Cs/CNTs/PANI composite delivers the maximum capacitance of 767 F g −1 at 1 A g −1, with a high capacitance retention of 87.5% for 5000 cycles at 5 A g −1. When assembled in asymmetric supercapacitor by using PC Cs/CNTs/PANI as positive electrode and PC Cs/CNTs as negative electrode, the device exhibits a specific capacitance of 102.5 F g −1 at 0.5 A g −1, and energy density is 56.9 Wh kg −1 at the power density of 537 W kg −1. Compared to existing carbon/PANI composites, PC Cs/CNTs/PANI composite shows an outstanding electrochemical performance, due to the tailored pore structure of PC Cs/CNTs and the high pseduocapacitance contributed by PANI wrapping layer.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0013468621018557; http://dx.doi.org/10.1016/j.electacta.2021.139571; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85119910621&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0013468621018557; https://dx.doi.org/10.1016/j.electacta.2021.139571
Elsevier BV
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