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| Naji, M. |
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Baby, Rakhi Raghavan
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Publications (4/4 displayed)
- 2016Direct chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applicationscitations
- 2016Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolytecitations
- 2013Facile synthesis of polyaniline nanotubes using reactive oxide templates for high energy density pseudocapacitorscitations
- 2011Enhancement of the energy storage properties of supercapacitors using graphene nanosheets dispersed with metal oxide-loaded carbon nanotubescitations
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article
Direct chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applications
Abstract
Transition metal carbides (MXenes) are an emerging class of two dimensional (2D) materials with promising electrochemical energy storage performance. Herein, for the first time, by direct chemical synthesis, nanocrystalline ε-MnO2 whiskers were formed on MXene nanosheet surfaces (ε-MnO2/Ti2CTx and ε-MnO2/Ti3C2Tx) to make nanocomposite electrodes for aqueous pseudocapacitors. The ε-MnO2 nanowhiskers increase the surface area of the composite electrode and enhance the specific capacitance by nearly three orders of magnitude compared to pure MXene based symmetric supercapacitors. Combined with enhanced pseudocapacitance, the fabricated ε-MnO2/MXene supercapacitors exhibited excellent cycling stability with ~88% of the initial specific capacitance retained after 10000 cycles which is much higher than pure ε-MnO2 based supercapacitors (~74%). The proposed electrode structure capitalizes on the high specific capacitance of MnO2 and the ability of MXenes to improve conductivity and cycling stability.