Polyaniline integration and interrogation on carbon nano-onions empowered supercapacitors

被引:23
作者
Majumder, Mandira [1 ]
Thakur, Anukul K. [1 ,2 ]
Bhushan, Mayank [3 ]
Mohapatra, Debananda [4 ]
机构
[1] Indian Sch Mines, Indian Inst Technol, Dept Phys, Dhanbad 826004, Bihar, India
[2] Sunchon Natl Univ, Dept Adv Components & Mat Engn, Chungnam 57922, South Korea
[3] North Eastern Hill Univ, Dept Nanotechnol, Shillong 793022, Meghalaya, India
[4] Yeungnam Univ, Sch Chem Engn, Gyongsan 38541, Gyeongbuk, South Korea
基金
新加坡国家研究基金会;
关键词
Carbon nano-onion; In-situ polymerization; Polyaniline; Electrochemical performance; Supercapacitors;
D O I
10.1016/j.electacta.2020.137659
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The clean energy storage and fast delivery during the demand for sudden power applications encourage us to synthesize highly graphitic carbon nano-onions (CNOs) using a simple, one-step synthesis protocol. The as-synthesized CNOs demonstrate an excellent electrochemical property without employing any post-synthesis harsh chemical treatments and purifications. The integration of CNOs with the polyaniline (PANI) by the in-situ oxidative polymerization of the aniline monomer shows noticeable enhancement in the PANI's overall electrochemical performance. PANI/CNO heterostructure exhibits a maximum deliverable specific capacitance of 196 F g(-1) at the current density of 1 A g(-1). Notably, the energy and power densities also show enhancement for the heterostructure. In the hybrid heterostructure, CNO effectively improves the electronic conductivity, lessens the PANI fibers' agglomeration, and generates a larger active surface for the electrolytic ion interactions. Simultaneous contribution and synergistic effect from the CNO and the PANI lead to the co-existence of both electric double layer and pseudocapacitive specific capacitance in the nanocomposite. Favorable mesoporous structure with uneven surface contributed by incorporating CNOs results in enhanced wettability and shorter ion diffusion path in the PANI/CNO electrode. The successful integration of CNO into PANI augmented the capacitive performance of the device effectively. (C) 2020 Elsevier Ltd. All rights reserved.
引用
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页数:11
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