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Title: Formation of CuMn Prussian blue analog double-shelled nanoboxes toward long-life Zn-ion batteries
Authors: Zeng, Yinxiang
Xu, Jianzhong
Wang, Yan
Li, Sheng
Luan, Deyan
Lou, David Xiong Wen
Keywords: Engineering::Bioengineering
Issue Date: 2022
Source: Zeng, Y., Xu, J., Wang, Y., Li, S., Luan, D. & Lou, D. X. W. (2022). Formation of CuMn Prussian blue analog double-shelled nanoboxes toward long-life Zn-ion batteries. Angewandte Chemie International Edition, 61(48), e202212031-.
Project: RG3/20
Journal: Angewandte Chemie International Edition 
Abstract: Prussian blue analogs (PBAs) are promising candidates for aqueous Zn-ion batteries due to their unique open-framework structures. However, they suffer from limited capacity and severe capacity decay originating from insufficient redox sites and structural instability. Herein, Cu-substituted Mn-PBA double-shelled nanoboxes (CuMn-PBA DSNBs) prepared by tannic acid etching and cation exchange approaches are demonstrated for efficient Zn ion storage. The unique hollow structures can expose abundant active sites and alleviate the volume change during the cycling test. Moreover, partial Cu substitution and induced Mn vacancies might inhibit the Jahn-Teller distortions of Mn-N6 octahedra, thus contributing to the prolonged lifespan. As a result, CuMn-PBA DSNBs exhibit high reversible capacity, decent rate performance and superior cycling stability for 2000 cycles. Furthermore, ex situ characterizations reveal that the charge storage mechanism of CuMn-PBA DSNBs mainly involves the reversible redox reactions of transition metals and Zn2+ ion insertion/extraction processes.
ISSN: 1433-7851
DOI: 10.1002/anie.202212031
Schools: School of Chemical and Biomedical Engineering 
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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