Volume 63, Issue 24 e202403050
Research Article

Zinc-Ion Anchor Induced Highly Reversible Zn Anodes for High Performance Zn-Ion Batteries

Dr. Shuang Zhou

Dr. Shuang Zhou

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

These authors contributed equally to this work.

Contribution: Data curation (equal), ​Investigation (supporting), Project administration (supporting), Resources (supporting), Writing - original draft (lead)

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Xinyu Meng

Xinyu Meng

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

These authors contributed equally to this work.

Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), ​Investigation (supporting), Resources (lead), Validation (equal), Writing - original draft (supporting)

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Yining Chen

Yining Chen

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Resources (supporting)

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Jianwen Li

Jianwen Li

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Visualization (supporting)

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Prof. Shangyong Lin

Prof. Shangyong Lin

School of Mineral Processing and Bioengineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Formal analysis (supporting)

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Prof. Chao Han

Prof. Chao Han

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Resources (supporting)

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Prof. Xiaobo Ji

Prof. Xiaobo Ji

College of Chemistry and Chemical Engineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Project administration (supporting)

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Prof. Zhi Chang

Corresponding Author

Prof. Zhi Chang

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Formal analysis (supporting), Project administration (supporting), Writing - original draft (supporting)

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Prof. Anqiang Pan

Corresponding Author

Prof. Anqiang Pan

Xinjiang Engineering Research Center of Environmental and Functional Materials, School of Materials Science and Engineering, Xinjiang University, 830046 Urumqi, Xinjiang, China

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China

Contribution: Funding acquisition (lead), Project administration (supporting), Writing - original draft (supporting)

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First published: 05 April 2024
Citations: 47

Graphical Abstract

Zn-ion anchoring strategy was proposed to manipulate the coordination structure of solvated Zn-ions and guide the Zn-ion depositional behavior. Specifically, the amphoteric charged ion additives act as zinc-ion anchors, guiding the uniform zinc-ion distribution by using its positively charged groups. While the negatively charged groups reduces the active water molecules within solvation sheaths of Zn-ions, enabling AZMBs with high reversibility and extra-long lifespans.

Abstract

Unstable Zn interface with serious detrimental parasitic side-reactions and uncontrollable Zn dendrites severely plagues the practical application of aqueous zinc-ion batteries. The interface stability was closely related to the electrolyte configuration and Zn2+ depositional behavior. In this work, a unique Zn-ion anchoring strategy is originally proposed to manipulate the coordination structure of solvated Zn-ions and guide the Zn-ion depositional behavior. Specifically, the amphoteric charged ion additives (denoted as DM), which act as zinc-ion anchors, can tightly absorb on the Zn surface to guide the uniform zinc-ion distribution by using its positively charged −NR4+ groups. While the negatively charged −SO3 groups of DM on the other hand, reduces the active water molecules within solvation sheaths of Zn-ions. Benefiting from the special synergistic effect, Zn metal exhibits highly ordered and compact (002) Zn deposition and negligible side-reactions. As a result, the advanced Zn||Zn symmetric cell delivers extraordinarily 7000 hours long lifespan (0.25 mA cm−2, 0.25 mAh cm−2). Additionally, based on this strategy, the NH4V4O10||Zn pouch-cell with low negative/positive capacity ratio (N/P ratio=2.98) maintains 80.4 % capacity retention for 180 cycles. A more practical 4 cm*4 cm sized pouch-cell could be steadily cycled in a high output capacity of 37.0 mAh over 50 cycles.

Conflict of interests

The authors declare no conflict of interest.

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