Superior sodium-ion storage performance of Co3O4@nitrogen-doped carbon: derived from a metal–organic framework

Ying Wang; Caiyun Wang; Yijing Wang; Huakun Liu; Zhenguo Huang

doi:10.1039/C6TA00236F

Superior sodium-ion storage performance of Co₃O₄@nitrogen-doped carbon: derived from a metal–organic framework†

Ying Wang,^ad Caiyun Wang,^b Yijing Wang,*^ac Huakun Liu^d and Zhenguo Huang*^d

* Corresponding authors

^a Key Laboratory of Advanced Energy Materials Chemistry, Nankai University, Tianjin, China
E-mail: wangyj@nankai.edu.cn

^b Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, NSW 2500, Australia

^c Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin, China

^d Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2500, Australia
E-mail: zhenguo@uow.edu.au

Abstract

Nitrogen-doped carbon coated Co₃O₄ nanoparticles (Co₃O₄@NC) with high Na-ion storage capacity and unprecedented long-life cycling stability are reported in this paper. The Co₃O₄@NC was derived from a metal–organic framework ZIF-67, where the Co ions and organic linkers were, respectively, converted to Co₃O₄ nanoparticle cores and nitrogen-doped carbon shells through a controlled two-step annealing process. The Co₃O₄@NC shows a porous nature with a surface area of 101 m² g⁻¹. When applied as an anode for sodium ion batteries (SIBs), Co₃O₄@NC delivers a high reversible capacity of 506, 317, and 263 mA h g⁻¹ at 100, 400, and 1000 mA g⁻¹, respectively. A capacity degradation of 0.03% per cycle over 1100 cycles was achieved at a high current density of 1000 mA g⁻¹. The outstanding Na-ion storage performance can be ascribed to the nitrogen-doped carbon coating (NC), which facilitates the capacitive reaction, minimizes the volume changes of Co₃O₄, and also enhances the electronic conductivity. This work sheds light on how to develop high-performance metal oxide@NC nanocomposites for SIBs.

This article is part of the themed collection: 2016 Journal of Materials Chemistry A HOT Papers

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Article information

DOI: https://doi.org/10.1039/C6TA00236F
Article type: Paper
Submitted: 09 Jan 2016
Accepted: 29 Jan 2016
First published: 29 Jan 2016

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J. Mater. Chem. A, 2016,4, 5428-5435

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Superior sodium-ion storage performance of Co₃O₄@nitrogen-doped carbon: derived from a metal–organic framework

Y. Wang, C. Wang, Y. Wang, H. Liu and Z. Huang, J. Mater. Chem. A, 2016, 4, 5428 DOI: 10.1039/C6TA00236F

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Journal of Materials Chemistry A