Revealing structure-performance relationship of biomimetic cyclodextrin metal-organic framework composite electrolytes for dendrite-free lithium metal batteries

被引：0
作者：
Zeng, Xiaoyue [1 ]
Zhu, Huirong [1 ]
Yuan, Haocheng [1 ]
Lan, Jinle [1 ]
Yu, Yunhua [1 ]
Lee, Young-Seak [2 ,3 ]
Yang, Xiaoping [1 ]
机构：
[1] Beijing Univ Chem Technol, Coll Mat Sci & Engn, State Key Lab Organ Inorgan Composites, North Third Ring Rd 15, Beijing 100029, Peoples R China
[2] Chungnam Natl Univ, Dept Chem Engn & Appl Chem, Daejeon 34134, South Korea
[3] Chungnam Natl Univ, Inst Carbon Fus Technol InCFT, Daejeon 34134, South Korea
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2025年 / 686卷
关键词：
Cyclodextrin metal-organic frameworks; Structure-performance relationships; Ion-sieving capacity; Solvation structure; Dendrite-free lithium metal battery; MEMBRANE;
D O I：
10.1016/j.jcis.2025.01.164
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cyclodextrin metal-organic frameworks (CD-MOFs) with infinitely extensible network structures show potential applications in lithium metal batteries. However, the disordered accumulation of CD-MOF particles leads to slow interparticle diffusion of ions, so the CD-MOF composite electrolytes are needed to be developed. In addition, the influences of CD-MOFs structure on the electrochemical performance of the composite electrolytes remains unclear. Herein, a series of CD-MOF composite electrolytes (BCDM-X) were prepared via in-situ growth of various CD-MOFs on bacterial cellulose (BC) fibers to research the structure-performance relationship of the CD-MOF composite electrolytes. The difference in host-guest interactions and the solvation structures of the BCDM-X were confirmed by FTIR, Raman spectroscopes and theoretical calculations. It is demonstrated that the BCDM1 electrolyte with an open multilevel hierarchical pore structure and a moderate pore size 1 to 2 times the size of anion profits for ion-sieving and regulation of solvation structure as the beat one. Therefore, the BCDM-1 electrolyte achieves high lithium-ion transference number (0.82), good ionic conductivity (1.61 mS cm- 1), wide electrochemical stability window (5.1 V), and stable long-term Li plating/stripping cycling over 1500 h at 0.2 mA cm- 2. By realizing homogeneous Li+ flux, the BCDM-1 composite electrolyte can inhibit the growth of lithium dendrites on the Li metal anode, prevent electrolyte decomposition, and facilitate the formation of a durable LiF
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页码：1 / 13
页数：13
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