Functional La@ZIF-8-enhanced composite quasi-solid electrolyte for high-performance Li-metal batteries

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-03-01 DOI:10.1016/j.cej.2025.160932

Yini Chen, Shuang Li, Changping Li, Xiaolong Leng, Nunna Guru Prakash, Tae Jo Ko

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引用次数: 0

Abstract

This study synthesizes La@Zeolitic imidazolate frameworks-8 (La@ZIF-8) metal–organic framework (MOF) nanoparticles as a coating material for composite quasi-solid-state electrolyte (CQSE). Theoretical calculations and experimental results revealed that incorporating the high-valent rare earth element La(Ⅲ) effectively enhances the anion-anchoring effect, weakens its binding with Li⁺ ions, and facilitates the dissociation of lithium salts. Simultaneously, the polarization phenomenon is suppressed, promoting stable lithium detachment and embedding in the electrodes. The CQSE comprising La@ZIF-8/SiO₂/PAN is produced by embedding SiO₂ nanoparticles into robust polyacrylonitrile (PAN) fiber membranes, followed by surface coating with La@ZIF-8 MOF. As a result, the La@ZIF-8/SiO₂/PAN CQSE demonstrates an ionic conductivity of 6.76 × 10⁻⁴ S/cm and a Li⁺ transfer number of 0.67 at room temperature (25 °C), with an initial discharge capacity of the La@ZIF-8/SiO₂/PAN battery at 138.61mAh g⁻¹. The capacity retention rate was 94.43 % after 200 cycles, with a capacity decay rate of only 0.02785 % per cycle. Thus, La@ZIF-8/SiO₂/PAN CQSE exhibits excellent electrochemical performance and cycling stability, ensuring the efficient and safe utilization of solid-state lithium-metal batteries.

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用于高性能锂金属电池的功能性 La@ZIF-8 增强复合准固体电解质

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.