High-performance lithium-sulfur battery separator based on bimetallic ZIF-8 derived porous carbon material

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-06-10 DOI:10.1016/j.poly.2025.117638

Zhiqiang Tang, Xinzuo Fang, Jiawei Shen, Fajun Wang, Junfei Ou, Changquan Li

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Abstract

Lithium-sulfur batteries (LSBs) are considered to be the most promising energy storage system due to their high specific capacity and energy density. In order to solve the problem that soluble polysulfide intermediates diffuse between cathode and anode during charging and discharging, which leads to rapid attenuation of battery cycle life, the separator modification materials come into people’s sight. Herein, a material that blends Ni²⁺ with ZIF-8 bimetal (Ni-ZIF-8-C) is synthesized and directly coated on the original separator for LSBs. Due to their versatility and modification, metal–organic frameworks (MOFs) have been explored as templates and precursors for various elementally doped carbon materials for a wide range of applications in electrochemistry. In this study, Ni and Zn co-doped porous carbon was obtained using bimetallic ZIF-8 as template and precursor. Ni and Zn enable rapid absorption of lithium polysulfides (LiPSs). Therefore, the lithium-sulfur battery with Ni-ZIF-8-C separator has high specific discharge capacity and cycling performance.

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基于双金属ZIF-8衍生多孔碳材料的高性能锂硫电池隔膜

锂硫电池因其高比容量和能量密度被认为是最有前途的储能系统。为了解决充放电过程中可溶多硫中间体在阴极和阳极之间扩散，导致电池循环寿命迅速衰减的问题，隔膜改性材料进入了人们的视野。本文合成了一种将Ni2+与ZIF-8双金属共混的材料（Ni-ZIF-8-C），并将其直接涂覆在原LSBs分离器上。由于其多功能性和可修饰性，金属有机框架（MOFs）已被探索作为各种元素掺杂碳材料的模板和前体，在电化学中有广泛的应用。本研究以双金属ZIF-8为模板和前驱体制备了Ni和Zn共掺杂多孔碳。Ni和Zn使锂多硫化物（LiPSs）快速吸收。因此，采用Ni-ZIF-8-C隔膜的锂硫电池具有较高的比放电容量和循环性能。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.