Issue 4, 2022

Preparation of nickel-bound porous carbon and its application in supercapacitors

Abstract

In this study, nickel-bound porous carbon (Ni-PC) was prepared by introducing Ni2+ into dipotassium ethylenediaminetetraacetate (EDTA-2K) derived nitrogen-doped porous carbon (PC) using the ball milling method. This solvent-free mechanochemical method is eco-friendly and rapid, because reactions are triggered by mechanical forces under extremely high concentrations of reactants. PC possesses a large specific surface area and abundant N/O-containing groups, which can coordinate with Ni2+, leading to excellent atomic dispersion and use in faradaic reactions. Therefore, Ni-PC exhibited high stability and excellent pseudocapacitance performance as a supercapacitor electrode material. Ni-doped PC was also prepared using pyrolysis and solution methods for comparison. The sample prepared by the ball milling method exhibited the best performance, a large specific capacitance (565 F g−1, 1 A g−1), a high-rate capability (358 F g−1, 10 A g−1), and superior cycling stability (105.8% capability retention after 10 000 cycles at 10 A g−1). Moreover, the asymmetric supercapacitor device Ni-PC//AC (AC, activated carbon) exhibited excellent application prospects. This study provided a novel method for preparing metal-ion-bound PC and verified its use in energy storage devices.

Graphical abstract: Preparation of nickel-bound porous carbon and its application in supercapacitors

Supplementary files

Article information

Article type
Research Article
Submitted
07 十一月 2021
Accepted
03 一月 2022
First published
05 一月 2022

Inorg. Chem. Front., 2022,9, 652-661

Preparation of nickel-bound porous carbon and its application in supercapacitors

L. Liu, Y. Li, Y. Meng, Y. Xue, B. Yang, B. Li and X. Liu, Inorg. Chem. Front., 2022, 9, 652 DOI: 10.1039/D1QI01403J

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