多硫化物
锂(药物)
硫黄
氧化还原
项链
电化学
化学
材料科学
锂硫电池
纳米技术
化学工程
无机化学
电极
有机化学
工程类
电解质
物理化学
内分泌学
组合数学
医学
数学
作者
Xue Li,Zhi‐Hao Yan,Jiayu Zhang,Zhi-Kai Huang,Fengrong Li,Liwen Yang,Jianyu Huang,Gang Wang,Guobao Xu
标识
DOI:10.1016/j.cej.2024.152554
摘要
Although UiO-66-based metal–organic framework (MOF) composites have been widely applied in the entrapment and catalytic effect toward lithium polysulfides (LiPSs), the synergistic engineering of structural and electronic regulation strategy has not been carefully considered. Herein, we optimize the internal cluster structure, rational regulate the size of UiO-66, and design the necklace-like structure composed of UiO-66 nanoparticles and acid-treated carbon nanotube (UiO-66/ACNT) through simple hydrothermal reaction and thermal treatment strategy. According to experiments and density universal function theory calculations, the improved UiO-66/ACNT architecture effectively provides more polarity to capture polysulfides via exposing more active sites and effectively delivers electrocatalytic activity of polysulfide conversion. Furthermore, systematic electrocatalytic kinetics, in situ Raman spectroscopy and in-situ impedance analysis indicate the functional separator can inhibit the shuttling effect, and catalyze the conversion of lithium polysulfide. As a result, Li-S batteries with functional separators exhibit excellent electrochemical performance (low fading rate over 1000 cycles of 0.06 % per cycle at 1C, high areal capacity of 4.01 mAh cm−2 at 0.2C). This work offers insight into the rational design of UiO-66-based metal–organic frameworks (MOFs) through synergistic engineering for high-performance Li-S batteries.
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