Issue 42, 2021

3D hollow cage copper cobalt sulfide derived from metal–organic frameworks for high-performance asymmetric supercapacitors

Abstract

Metal–organic frameworks (MOFs) have been attracting considerable attention due to their large specific surface area and excellent adjustable voids. A one-step solvothermal method is proposed herein to fabricate 3D hollow cage copper cobalt sulfide CuCo2S4via sulfuration and cation exchange reaction based on MOF ZIF-67. The ternary bimetallic material CuCo2S4 not only retains the spatial structure of ZIF-67 but also adjusts the hierarchical hollow structure by adding a Cu “shell”. The hollow cage CuCo2S4 can typically exhibit large specific surface areas, expose additional electroactive sites, and shorten ion/electron diffusion paths. The physicochemical characteristics are comprehensively determined using basic characterization techniques. As an electrode material for supercapacitors, CuCo2S4 has a high specific capacitance of 1096.27 F g−1 at a current density of 0.5 A g−1. Furthermore, an asymmetric supercapacitor (CuCo2S4//AC ASC) device is assembled to prove the practical applicability, and the energy and power densities, respectively, reached 87.59 W h kg−1 and 399.65 W kg−1 at 0.5 A g−1. This device retains 95.83% capacity over 5000 cycles at a current density of 10 A g−1. The proposed method provides an optional protocol for designing and fabricating electrode materials with superior electrochemical energy storage properties and exceptional cyclic stability, presenting additional options for future energy storage devices.

Graphical abstract: 3D hollow cage copper cobalt sulfide derived from metal–organic frameworks for high-performance asymmetric supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
06 июл 2021
Accepted
31 авг 2021
First published
01 сен 2021

CrystEngComm, 2021,23, 7385-7396

3D hollow cage copper cobalt sulfide derived from metal–organic frameworks for high-performance asymmetric supercapacitors

J. Wang, Y. Quan, G. Wang, D. Wang, J. Xiao, S. Gao, H. Xu, S. Liu and L. Cui, CrystEngComm, 2021, 23, 7385 DOI: 10.1039/D1CE00884F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements