Architecturally Robust Graphene-Encapsulated MXene Ti2 CT x @Polyaniline Composite for High-Performance Pouch-Type Asymmetric Supercapacitor

ACS Applied Materials & Interfaces
Jianjian FuKwang Ho Kim

Abstract

A harmonized three-component composite system which preserves the characteristics of individual components is of interest in the field of energy storage. Here, we present a graphene-encapsulated MXene Ti2CT x@polyaniline composite (GMP) material realized in a systematically stable configuration with different ternary nanomaterials for supercapacitor electrodes. Due to the different ζ-potentials in a high-pH solution, chemically converted graphene (negatively charged) is thoroughly unfolded to allow full encapsulation, but the MXene Ti2CT x@polyaniline composite with a low positive ζ-potential is easily attracted toward a counter-charged substance. The obtained GMP electrode exhibits improved cycling stability and better electrochemical performance owing to the use of mechanically robust and chemically inert graphene and the densely intercalated conductive polyaniline between the multilayer MXenes. The GMP electrode has a high gravimetric capacitance of 635 F g-1 (volumetric capacitance of 1143 F cm-3) at a current density of 1 A g-1 with excellent cycling stability of 97.54% after 10 000 cycles. Furthermore, the asymmetric pouch-type supercapacitor assembled using the GMP as a positive electrode and graphene as a negative elect...Continue Reading

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Citations

Apr 22, 2020·Chemistry : a European Journal·Jingquan LiuWeiguo Huang
Mar 18, 2021·ACS Applied Materials & Interfaces·Junyeong YunJodie L Lutkenhaus
Jul 14, 2021·Macromolecular Rapid Communications·Shaoshuai HeJunjie Li
Mar 4, 2020·ACS Applied Materials & Interfaces·Bingbing ChenLixin Song

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