Journal of Materiomics

Journal of Materiomics

Volume 7, Issue 6, November 2021, Pages 1358-1368
Journal of Materiomics

Porous CuCo2O4 microtubes as a promising battery-type electrode material for high-performance hybrid supercapacitors

https://doi.org/10.1016/j.jmat.2021.03.011Get rights and content
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Highlights

  • Porous CuCo2O4 microtubes were prepared via a solvothermal method.

  • The CuCo2O4 microtubes exhibited a high specific capacity of 393.66 C g−1 at 1 A g−1.

  • 77.7% of initial capacity was retained as the current density was increased from 1 to 10 A g−1.

  • The CuCo2O4 microtubes delivered a high energy density of 32.49 W h kg−1 at a power density of 912.10 W kg−1.

Abstract

Hollow nanostructures of transition metal oxides (TMOs) with hollow interior, low density, large surface area and surface permeability have drawn significant interest as electrode materials for supercapacitors. However, it is still challenging to controllably prepare hollow nanostructures by a facile method. Herein, we report for the first time that CuCo2O4 microrod precursor obtained from a solvothermal method in ethanol media can be converted into porous CuCo2O4 microtubes (CuCo2O4 MTs) in the post annealing treatment. The results of electrochemical tests demonstrate that these MTs are categorized as the typical battery-grade electrode materials. They can deliver a high capacity up to 393.66 C g−1 at 1 A g−1 and still hold 305.99 C g−1 at 10 A g−1. Additionally, an assembled hybrid supercapacitor (CuCo2O4 MTs//AC HSC) exhibits 78.23 F g−1, good cycling durability and high energy density (32.49 W h kg−1 at 912.10 W kg−1). The present synthetic methodology may be further applicable to the preparation of other hollow structural TMOs with applications in high-performance energy storage and conversion devices.

Keywords

CuCo2O4
Hybrid supercapacitors
Hollow structure
Battery-type

Cited by (0)

Jiale Sun is a master candidate under the supervision of Prof. Chunju Xu and Prof. Huiyu Chen at North University of China. He received his bachelor’s degree from Zhengzhou University of Light Industry (China) in 2018. His current research interests are the porous transition metal oxides and their applications in supercapacitors.

Xiaodong Tian is currently a research assistant at Institute of Coal Chemistry, Chinese Academy of Sciences. He got his PhD degree from University of Chinese Academy of Sciences in 2017. His current research interests involve the structural design and engineering of micro/nano-structured materials for electrochemical energy storage application.

Chunju Xu is an associate professor at the School of Materials Science and Engineering in North University of China. She received her PhD degree in Advanced Materials Science and Engineering from Sungkyunkwan University, South Korea (2012). Her current research interest focuses on the transition metal oxides based electrode materials and their applications in energy storage.

Huiyu Chen is currently an associate professor at the School of Materials Science and Engineering in North University of China. He received his PhD degree in Advanced Materials Science and Engineering from Sungkyunkwan University, South Korea (2011). He mainly works on metal oxides for electrochemical energy storage.

Peer review under responsibility of The Chinese Ceramic Society.