Regulating Exposed Facets of Metal-Organic Frameworks for High-rate Alkaline Aqueous Zinc Batteries

Shuo Yang; Haiming Lv; Yanbo Wang; Xun Guo; Lingzhi Zhao; Hongfei Li; Chunyi Zhi

doi:10.1002/anie.202209794

Regulating Exposed Facets of Metal-Organic Frameworks for High-rate Alkaline Aqueous Zinc Batteries

Angew Chem Int Ed Engl. 2022 Nov 21;61(47):e202209794. doi: 10.1002/anie.202209794. Epub 2022 Oct 21.

Authors

Shuo Yang^{1

2}, Haiming Lv¹, Yanbo Wang², Xun Guo², Lingzhi Zhao³, Hongfei Li^{1

4}, Chunyi Zhi^{1

2

5

6}

Affiliations

¹ Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China.
² Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, China.
³ Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials, Institute of Semiconductor Science and Technology, South China Normal University, Guangzhou, 510631, China.
⁴ School of System Design and Intelligent Manufacturing, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
⁵ Hong Kong Institute for Advanced Study, City University of Hong Kong, Kowloon, Hong Kong, 999077, China.
⁶ Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, Hong Kong, 999077,, Hong Kong.

PMID: 36190783
DOI: 10.1002/anie.202209794

Abstract

Metal-organic frameworks (MOFs) have drawn growing attention as promising electrode candidates for rechargeable batteries. However, most studies focus on the direct use of MOF electrodes without any modification. Post-synthetic modification, a judicious tool to modify targeted properties of MOFs, has been long-neglected in the field of batteries. Herein, crystal-facet engineering is proposed to design MOF-based electrodes with high capacity and fast electrochemical kinetics. We found that a thermally-modified strategy can regulate the dominant exposed facet of Ni-based MOF (PFC-8). With the optimally exposed facets, the battery exhibited admirable rate capability (139.4 mAh g^-1 at 2.5 A g^-1 and 110.0 mAh g^-1 at 30 A g^-1 ) and long-term stability. Furthermore, density functional theory calculations demonstrate that stronger OH^- adsorption behaviors and optimized electronic structures induced by the regulated exposed facets boost the electrochemical performance.

Keywords: Aqueous Zinc Batteries; Facets; Metal-Organic Frameworks; Superior Rate Capability.

Abstract

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