Research Article

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2021, 14(12): 4556–4562

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https://doi.org/10.1007/s12274-021-3372-5

Ordered structure of interlayer constructed with metal-organic frameworks improves the performance of lithium-sulfur batteries

Sijia Guo1,§, Yingbo Xiao1,§, Jia Wang1, Yuan Ouyang1, Xin Li1, Haoyan Deng1, Wenchao He1, Qinghan Zeng1, Wei Zhang1, Qi Zhang1,2 (✉), and Shaoming Huang1,2 (✉)

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1 Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
2 Synergy Innovation Institute of GDUT, Heyuan 517000, China
§ Sijia Guo and Yingbo Xiao contributed equally to this work.

Keywords: ordered structure, interlayer, metal-organic frameworks, lithium-sulfur battery
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  • Abstract
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Lithium-sulfur (Li-S) battery has attracted intensive attention in the realm of energy storage owing to its high theoretical capacity and energy density. However, the shuttle effect of soluble lithium polysulfides (LiPSs) between electrodes results in rapid capacity degradation. Herein, a strategy which combines the design of both chemical interaction and microstructure of interlayer was proposed to suppress the shuttle effect. The chemical interaction between different functionalized MOFs and LiPSs was systematically studied to find the best candidate. Furthermore, an interlayer with ordered structure was constructed via the layer-by-layer assembly of metal-organic frameworks (MOFs) on graphene (UiO-66-NH2@graphene) to create sinuous channels which can better impede the diffusion process of LiPSs by the strong adsorption of MOF toward LiPSs. Consequently, in comparison to the battery with a bare separator, the ordered interlayer increased the initial discharge capacity of battery by 28.98% at 1.0 C and lowered the capacity decay rate remarkably from 0.10% to 0.067% per cycle, indicating that the design of chemical interaction and microstructure paves the way for high-performance Li-S batteries.
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Ordered structure of interlayer constructed with metal-organic frameworks improves the performance of lithium-sulfur batteries. Nano Res. 2021, 14(12): 4556–4562 https://doi.org/10.1007/s12274-021-3372-5

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