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1.南昌理工学院 智能建筑工程学院,江西 南昌 330044
2.山东理工大学 材料科学与工程学院,山东 淄博 255000
3.华东交通大学 材料科学与工程学院,江西 南昌 330013
王英姑(1990—),硕士,讲师,研究方向为有机多孔材料功能应用研究,E-mail:wyinggu@163.com。
赵付来(1990—),博士,教授,研究方向为纳米复合材料及功能应用研究,E-mail:ialufhz@163.com;
李 震(1990—),博士,讲师,研究方向为多孔材料及功能应用研究,E-mail:zhenli9084@163.com。
收稿:2025-06-15,
修回:2025-08-04,
网络出版:2025-12-23,
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王英姑,杨时进,陈绘宇等.功能性COF-Br-SO3Li材料的制备及锂离子传导性能研究[J].低碳化学与化工,
WANG Yinggu,YANG Shijin,CHEN Huiyu,et al.Study on synthesis of functional COF-Br-SO3Li material and its lithium-ion conduction performance[J].Low-Carbon Chemistry and Chemical Engineering,
王英姑,杨时进,陈绘宇等.功能性COF-Br-SO3Li材料的制备及锂离子传导性能研究[J].低碳化学与化工, DOI:10.12434/j.issn.2097-2547.20250270.
WANG Yinggu,YANG Shijin,CHEN Huiyu,et al.Study on synthesis of functional COF-Br-SO3Li material and its lithium-ion conduction performance[J].Low-Carbon Chemistry and Chemical Engineering, DOI:10.12434/j.issn.2097-2547.20250270.
共价有机框架材料(COFs)凭借其结构可设计性、良好热/化学稳定性和有序孔道,在固态电解质基体材料方面展现出较大应用潜力。然而,现有磺酸功能化COFs基固态电解质材料结构单一,限制了其性能提升。采用溶剂热法合成含溴基锚定点的COF-Br,通过威廉姆逊醚合成反应引入磺酸功能性基团,成功制备了功能性COF-Br-SO
3
Li材料,并将其与聚环氧乙烷(PEO)复合,制备了新型复合固态电解质薄膜。通过XRD、FT-IR和TGA等表征手段,验证了制备的COFs具有良好的结晶性、多孔性和热稳定性。电化学性能表征结果表明,30 ℃下,COF-Br-SO
3
Li固态电解质的锂离子传导率为2.5 × 10
-5
S/cm,活化能为0.25 eV,电化学稳定窗口拓宽至5.2 V,锂离子迁移数提升至0.65。在锂对称电池循环充放电测试(500 h)过程中,该固态电解质表现出良好的界面稳定性,以及优异的抑制锂枝晶生长性能。
Covalent organic frameworks (COFs)
owing to their structural designability
excellent thermal and chemical stability and ordered pore channels
exhibit great potential as matrix materials for solid-state electrolytes. However
existing sulfonic acid-functionalized COF-based solid-state electrolyte materials possess relatively simple structures
which limit their further performance enhancement. COF-Br containing bromine anchoring sites was synthesized via a solvothermal method. Through a Williamson ether synthesis reaction
sulfonic acid functional groups were successfully introduced
leading to the preparation of the functional COF-Br-SO
3
Li material. By compositing COF-Br-SO
3
Li with polyethylene oxide (PEO)
a novel composite solid-state electrolyte film was obtained. Characterization results from XRD
FT-IR and TGA confirm that the prepared COFs possess good crystallinity
porosity and thermal stability. Electrochemical measurements demonstrate that at 30 ℃
the lithium-ion conductivity of the COF-Br-SO
3
Li solid-state electrolyte reaches 2.5 × 10
-5
S/cm
with an activation energy of 0.25 eV
an electrochemical stability window extending up to 5.2 V and a lithium-ion transference number of 0.65. During the lithium symmetric cell cycling test
(500 h)
the solid-state electrolyte exhibits excellent interfacial stability and outstanding capability to suppress lithium dendrite growth.
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