Binder-free stainless steel@Mn3O4 nanoflower composite: a high-activity aqueous zinc-ion battery cathode with high-capacity and long-cycle-life

Chuyu Zhu; Guozhao Fang; Jiang Zhou; Jiahao Guo; Ziqing Wang; Chao Wang; Jiaoyang Li; Yan Tang; Shuquan Liang

doi:10.1039/C8TA01198B

Binder-free stainless steel@Mn₃O₄ nanoflower composite: a high-activity aqueous zinc-ion battery cathode with high-capacity and long-cycle-life†

Chuyu Zhu,‡^a Guozhao Fang,‡^a Jiang Zhou,

*^a Jiahao Guo,^a Ziqing Wang,^a Chao Wang,

^bd Jiaoyang Li,^bc Yan Tang*^a and Shuquan Liang*^a

Author affiliations

* Corresponding authors

^a School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
E-mail: zhou_jiang@csu.edu.cn, tangyancsu@126.com, lsq@csu.edu.cn

^b Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

^c Institute of Nuclear & New Energy Technology, Tsinghua University, Beijing 100084, China

^d Collaborative Innovation Center of Intelligent New Energy Vehicle, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China

Abstract

Rechargeable aqueous zinc-ion batteries (ZIBs) are highly desirable for large-scale energy storage to meet the increasing demand for safe and sustainable energy storage devices. Herein, we report a binder-free stainless steel welded mesh@flower-like Mn₃O₄ (SSWM@Mn₃O₄) composite with high zinc storage capability for aqueous ZIBs. Chemical conversion reaction mechanism is proposed for this material. The hierarchical nanoflower structure composed of ultrathin nanosheets facilitates electrolytic infiltration and diffusion of Zn²⁺. Benefiting from the binder-free conductive substrate, SSWM@Mn₃O₄ exhibits lower electrode reaction resistance and smaller slope of Warburg diffusion element, which contributes to the excellent electrochemical performances, including high specific capacity of 296 mA h g⁻¹ at 100 mA g⁻¹ and long-term cyclic stability up to 500 cycles at 500 mA g⁻¹, thus demonstrating a promising cathode for aqueous ZIBs.

This article is part of the themed collection: Precious Elements

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Article information

DOI: https://doi.org/10.1039/C8TA01198B
Article type: Paper
Submitted: 05 Feb 2018
Accepted: 25 Apr 2018
First published: 27 Apr 2018

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J. Mater. Chem. A, 2018,6, 9677-9683

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Binder-free stainless steel@Mn₃O₄ nanoflower composite: a high-activity aqueous zinc-ion battery cathode with high-capacity and long-cycle-life

C. Zhu, G. Fang, J. Zhou, J. Guo, Z. Wang, C. Wang, J. Li, Y. Tang and S. Liang, J. Mater. Chem. A, 2018, 6, 9677 DOI: 10.1039/C8TA01198B

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Journal of Materials Chemistry A