Intralayered ostwald ripening impelled nanoarchitectonics of MXene nanorods on MXene nanosheets with boron carbon nitride for robust supercapacitor application

Abstract

Utilizing 2D layered materials as one of the composite's members in the synthesis of active material for supercapacitors is acquiring imperative attention on account of the extraordinary outcomes due to their wholesome hale structural and electrochemical affinity. Here, by rousing from intralayer ostwald ripening impelled growth of in situ spawned 1D Nb2C rods on 2D Nb2C sheets, in short form (h)Nb2C are generated via hydrothermal low temperature treatment without, which overwhelms the electrochemical performance of pure 2D MXene sheets. Later the residue less direct pyrolysis method was adopted for the in-situ development of 2D BCN nanosheets over MXene, 1D-2D/2D MXene/BCN hybrid nanoarchitectonics. The process method enabled the interrelated structural growth of BCN particles on MXene and helps in empowering the pseudocapacitive activity of the enlarged portion of Nb sites by the removal of the terminal groups. Thus, the fabricated 1D-2D/2D Nb2C/BCN (NBCN) electrode showed a specific capacitance of 765 F g− 1 at 2 A g− 1 current density with a high specific energy of 35 Wh kg−1. Eventually, the solid-state supercapacitor device further withstands 100,000 cycles displaying high efficiency and ∼100% retention. Henceforth, the 1D-2D/2D heterostructures with magnificent electrochemical properties can act as a feasible energy storage system.