Volume 61, Issue 44 e202210979
Research Article

Anion-Trap Engineering toward Remarkable Crystallographic Reorientation and Efficient Cation Migration of Zn Ion Batteries

Meijia Qiu

Meijia Qiu

Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangdong, 510632 P. R. China

These authors contributed equally to this work.

Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), ​Investigation (lead), Software (lead), Writing - original draft (lead)

Search for more papers by this author
Dr. Peng Sun

Dr. Peng Sun

Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangdong, 510632 P. R. China

These authors contributed equally to this work.

Contribution: Data curation (lead), Formal analysis (lead), Funding acquisition (equal), ​Investigation (equal), Software (lead), Visualization (supporting), Writing - original draft (lead)

Search for more papers by this author
Dr. Yu Wang

Dr. Yu Wang

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077 P. R. China

Contribution: Formal analysis (equal), Visualization (equal), Writing - original draft (equal)

Search for more papers by this author
Dr. Liang Ma

Dr. Liang Ma

Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangdong, 510632 P. R. China

Contribution: Formal analysis (supporting), Software (equal)

Search for more papers by this author
Prof. Chunyi Zhi

Corresponding Author

Prof. Chunyi Zhi

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077 P. R. China

Contribution: Formal analysis (lead), Supervision (lead), Writing - review & editing (lead)

Search for more papers by this author
Prof. Wenjie Mai

Corresponding Author

Prof. Wenjie Mai

Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangdong, 510632 P. R. China

Contribution: Formal analysis (lead), Funding acquisition (lead), Supervision (lead), Writing - review & editing (lead)

Search for more papers by this author
First published: 29 August 2022
Citations: 233

Graphical Abstract

A special design of anion-trap additive can greatly enhance the stability and capacity of the Zn ion batteries via modulating preferred Zn crystal plane and enabling fast Zn ion migration.

Abstract

Zn batteries are considered as potential candidates in future power sources, however suffer problems of rampant dendrite/by-product on Zn anodes, torpid Zn2+ transfer/diffusion and poor energy density. Inspired by the host-guest interaction chemistry, an anion-trap agent β-cyclodextrin (β-CD) is introduced into the Zn(ClO4)2 electrolyte to induce dominant Zn (002) deposition and improve Zn2+ migration behaviors. The anion ClO4 is revealed to be trapped inside the cavity of β-CD, impairing barriers for Zn2+ migration and significantly elevating the Zn2+ transference number to 0.878. Meanwhile, the β-CD@ClO4 complex shows the function in preferential growth of the Zn (002), blocking the approach of dendrite growth. Above combined functions lead to substantial enhancement in long-term stability and cell capacity, as proved by 10 times longer life of Zn||Zn symmetric cells and 57 % capacity increasement of Zn-MnO2 full cells (at 0.1 A g−1) compared with that of pure Zn(ClO4)2 electrolyte.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.