Abstract
Abstract
This work reports an in situ, one-step hydrothermal preparation procedure of a binder-free electrode growth of Ni6Se5 on nickel foam (Ni6Se5/NF) with a rod-like structure. Ni6Se5 is an enveloped transition metal chalcogenides of formula M(n+1)X
n
(where 2 ≤ n ≤ 8, M is a transition metal and X is chalcogen) of the nickel selenide family. The Ni6Se5/NF electrode described here demonstrates an exceptional lifetime of 81% capacitance retention over 20000 cycles and a high specific capacitance of 473.5 Fg−1 at a current density of 4 Ag−1. The Ni6Se5/NF/activated carbon asymmetric supercapacitor (SC) exhibits a remarkable 97.3 Whkg−1 energy density and a 2325 Wkg−1 power density. Ni6Se5 served as an active electrode material in SC applications and offered exceptional power density and long cycle life. Ni6Se5/NF, used as an anode for Li-ion batteries, has a lithium storage capacity of 939.7 mAhg−1 at 100 mAg−1 current density. Ni6Se5’s (active electrode material) excellent energy storage capability, which was previously unreported, is particularly beneficial for electrochemical energy storage device applications.
Subject
Electrical and Electronic Engineering,Mechanical Engineering,Mechanics of Materials,General Materials Science,General Chemistry,Bioengineering
Cited by
3 articles.
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