Issue 19, 2022

Heterostructured Co-NTC@Co3S4 as an anode material for asymmetric pseudocapacitors

Abstract

Herein, a composite structure of ZIF-67@Co-NTC was synthesized by using ZIF-67 as a sacrificial template and rigid 1,4,5,8-naphthalenetetracarboxylic acid (NTC) as a linking ligand, and it was partially vulcanized to form layer-like Co3S4 nanosheets to finally successfully synthesize a composite heterostructure of Co-NTC@Co3S4. In the process of charge and discharge, the layered structure can improve the electron transport efficiency and prevent the accumulation of the nanosheets. Based on these advantages, Co-NTC@Co3S4 exhibits excellent electrochemical properties. It can reach 3117.3 F g−1 at 1 A g−1, and the magnification capacity is about 80% at 10 A g−1; meanwhile, after 1000 cycles, the retention rate can reach up to 87% at this current density. A hybrid supercapacitor composed of Co-NTC@Co3S4 and AC (activated carbon) exhibits ideal performance; for example, the cycle performance can reach up to 110% after 5000 cycles (10 A g−1). The excellent electrochemical properties indicate that Co-NTC@Co3S4 is a promising electrode material in the field of energy storage. This work provides general tactics that would realize the potential of the derivatives of ZIF@MOFs as high-performance electrode materials.

Graphical abstract: Heterostructured Co-NTC@Co3S4 as an anode material for asymmetric pseudocapacitors

Supplementary files

Article information

Article type
Paper
Submitted
03 Mar 2022
Accepted
10 Apr 2022
First published
04 May 2022

CrystEngComm, 2022,24, 3621-3629

Heterostructured Co-NTC@Co3S4 as an anode material for asymmetric pseudocapacitors

X. Liu, X. Zhang, Q. Yin, R. Liu, N. Liu, J. Hu, F. Shen and X. Zhu, CrystEngComm, 2022, 24, 3621 DOI: 10.1039/D2CE00300G

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