Regulating Li+ Transfer and Solvation Structure via Metal-Organic Framework for Stable Li Anode

Yao Yao Li; Yin Hu; Cheng Tao Yang

doi:10.4028/p-in7u78

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 939Regulating Li+ Transfer and Solvation Structure...

Regulating Li⁺ Transfer and Solvation Structure via Metal-Organic Framework for Stable Li Anode

Abstract:

Lithium metal batteries (LMBs) possess large application potential for advanced rechargeable batteries due to the high energy density (> 500 Wh kg⁻¹) and alternative cathode materials. Random Li dendrite growth caused by uneven Li⁺ distribution and local ion depletion near surface of Li anode induces battery failure with inferior long-term stability. Therefore, regulation of ion distribution near anode surface is essential to realize dendrite-free and uniform Li deposition. Herein, a metal-organic framework (MOF), i.e., ZIF-8, is applied to regulate Li⁺ solvation structure via unsaturated metal-ion sites to achieve uniform Li⁺ distribution and Li deposition. A stable cycling performance over 800 h for Li symmetrical cell at 3 mA cm⁻² and 3 mAh cm⁻² without short circuit is realized. The facilitated Li⁺ solvation via the adsorption effect of metal-ion sites on anions is demonstrated, which further enhances the uniform Li⁺ distribution near Li anode surface. This work demonstrates an effective strategy for regulating ion coordination and Li⁺ distribution to stabilize Li anode via MOF-based materials.

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Periodical:

Key Engineering Materials (Volume 939)

Pages:

123-127

DOI:

https://doi.org/10.4028/p-in7u78

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Online since:

January 2023

Authors:

Yao Yao Li*, Yin Hu, Cheng Tao Yang

Keywords:

Ion Transfer, Li Metal Anode, Li⁺ Solvation, Metal-Organic Framework

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* - Corresponding Author

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