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Ultra-small bimetallic CoNi nanoalloy decorated on 2D g-C3N4 enables high performance and long durability for asymmetric supercapacitor by Vijay Tripathi; Shobhnath P. Gupta; Kuldeep Kumar; Leela S. Panchakarla is a Engineering article available to read on EtoBox.

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Alloying metals change their characteristics significantly. Nanoalloy electrodes are excellent materials for pseudocapacitors, which bridge supercapacitors and batteries. We report an ultra-small bimetallic CoNi nanoalloy functionalized on 2D graphitic nitride (g-C 3 N 4 ) sheets via hydrogenation. An asymmetric supercapacitor of CoNi@g-C 3 N 4 nanoalloy fabricated with activated carbon nanofiber (ACF) shows a wide potential window of 1.5 V and an excellent life span of 8000 cycles at an ultra-high current density of 15 A g -1 . Further, we operated the cell at 2 • C, RT, 50 • C and 65 • C, which shows an enhanced energy density of 26 Wh kg -1 at 50 • C than at a lower temperature (2 • C) of 15 Wh kg -1 .

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Author

Vijay Tripathi; Shobhnath P. Gupta; Kuldeep Kumar; Leela S. Panchakarla

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)