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3D cellular lattice like-Ti3C2 MXene based aerogels embedded with metal selenides particles for energy storage and water splitting applications by Khadija Chaudhary; Beriham Basha; Sonia Zulfiqar; Sheraz Yousaf; Eric W. Cochran; M.S. Al-Buriahi; Muhammad Farooq Warsi; Muhammad Shahid is a Engineering article available to read on EtoBox.

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In this research, we have designed novel three-dimensional (3D) Ti3C2 MXene/rGO composite aerogels (MGA) integrated with octahedron-like NiSe2 (NS), with different mass loadings of MXene (20 wt% and 40 wt%). Resultant aerogels developed into a cellular lattice like network that significantly improved the contact area among active material and electrolyte. 3D spongy scaffold of MGA boosted the mass diffusion rate, and good electrical conductivity of MXene and rGO provided fast transport of charges during the electrochemical tests, which endowed superior supercapacitor and water splitting performances. Electrode with optimized MXene/rGO ratio i.e., NSMGA-40, exhibited a remarkable specific capacity of 289.7 mAh g−1 at current density of 1 A g−1 and excellent durability of 92.5% over 5000 charge/discharge cycles at 12 A g−1 in a three electrode system for supercapacitor. Meanwhile, as a bifunctional electrocatalyst, NSMGA-40 required a low overpotential of 97 mV and 262 mV to reach 10 mA cm−2 for HER and OER activity, respectively, in alkaline media. The values of Tafel slopes were as small as 89 mV dec−1 (HER) and 75 mV dec−1 (OER), signifying accelerated electron-transfer kinetics.

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Author

Khadija Chaudhary; Beriham Basha; Sonia Zulfiqar; Sheraz Yousaf; Eric W. Cochran; M.S. Al-Buriahi; Muhammad Farooq Warsi; Muhammad Shahid

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)