Journal
CHEMICAL ENGINEERING JOURNAL
Volume 333, Issue -, Pages 111-121Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.09.155
Keywords
Polypyrrole nanotubes; NiCo2S4; Core-shell heterostructure; Asymmetric supercapacitors
Categories
Funding
- Natural Science Foundation under the grants of NSFC [51602289]
- Outstanding Young Talent Research Fund of Zhengzhou University [32210461]
- Startup Research Fund of Zhengzhou University [51090104]
Ask authors/readers for more resources
In this work, a unique Ppy@NiCo2S4 core-shell heterostructure material is prepared taking polypyrrole (Ppy) nanotubes as skeleton through a simple and environmentally friendly hydrothermal method. The heterostructured structure with Ppy nanotubes (NTs) as the core and intertwined flake-like NiCo2S4 as the outer shell, holds a large specific surface area (217 m(2) g(-1)), convenient charge transport channel, high specific capacitance (908.1 F g(-1) at a current density of 1 A g(-1)), and excellent cycling performance (87.7% of initial value is retained after 2000 cycles). What's more, an asymmetric supercapacitor is fabricated by employing Ppy@NiCo2S4 core-shell heterostructured material as positive and nitrogen-doped carbon nanotubes (N-C NTs) as negative electrode. This Ppy@NiCo2S4//N-C asymmetric supercapacitor effectively provides a high energy density over 50.82 Wh kg(-1) with a high power density of 160 W kg(-1) and preeminent cyclic stability of 126.6% after 2000 cycles. Due to the introduction of one-dimensional flexible Ppy inner core, as-designed the core-shell heterostructure composite may be promising in the flexible energy storage devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available