Double-shelled tremella-like NiO@Co3O4@MnO2 as a high-performance cathode material for alkaline supercapacitors

Wang, H., Ren, Q., Brett, D.J.L. , He, Guanjie, Wang, R., Key, J. and Ji, S. (2017) Double-shelled tremella-like NiO@Co3O4@MnO2 as a high-performance cathode material for alkaline supercapacitors. Journal of Power Sources, 343 . pp. 76-82. ISSN 0378-7753

Full content URL: http://doi.org/10.1016/j.jpowsour.2017.01.042

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Item Type:Article
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Abstract

Tremella-like NiO@Co3O4@MnO2 particles of core-double-shelled structure were synthesized by a three-step hydrothermal route and thermal treatment. The hierarchical layered porous structure of the particles has a BET surface area of 179.2 m2 g−1. Galvanostatic cycling in 6.0 M KOH aqueous solution produced capacitance over an ideal cathode potential cycling range. At a high current density of 2 A g−1, NiO@Co3O4@MnO2 has a high specific capacitance of 792.5 F g−1 with > 90% capacity retention over 1000 cycles, and a high rate capability of 68.9% of its initial capacitance was also maintained over a 0.2–4 A g−1 current density increase. We conclude that NiO@Co3O4@MnO2 offers a promising high rate, high specific capacitance cathode material for alkaline supercapacitors, which owes both to its porous architecture and its synergistic mixed oxide core-shell-shell composition.

Additional Information:cited By 39
Divisions:College of Science > School of Chemistry
ID Code:39459
Deposited On:15 Jan 2020 10:55

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