一种氟化碳材料及其制备方法和应用
By preparing uniformly distributed C(sp2)-F bond fluorinated carbon materials, the problems of poor conductivity and charging difficulty in lithium-carbon fluoride batteries were solved, realizing the efficient recycling of secondary lithium-carbon fluoride batteries and improving battery energy density and cycle stability.
CN118183707BActive Publication Date: 2026-07-17CHONGQING UNIV LITHIUM BATTERY & NEW MATERIALS SUINING RES INST
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING UNIV LITHIUM BATTERY & NEW MATERIALS SUINING RES INST
- Filing Date
- 2024-03-12
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Lithium-carbon fluoride batteries face challenges such as poor conductivity, high cost, difficulty in charging, and large-scale production, which limit their secondary applications.
Method used
Using fluorine-containing metal-organic framework (MOF) crystals as precursors, uniformly distributed C(sp2)-F bonded fluorinated carbon materials were prepared through solvothermal reaction and carbonization treatment, which were then used as cathode materials to construct secondary lithium-fluorinated carbon batteries.
Benefits of technology
It achieves good conductivity and cycle stability of fluorinated carbon materials, enables the recycling of cathode materials, increases battery energy density to 623Wh/kg, and achieves cycle efficiency of over 99%.
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Figure CN118183707B_ABST
Abstract
本发明公开了一种氟化碳材料及其制备方法和应用，属于合成材料技术领域。本发明提供的氟化碳材料的制备方法包括以下步骤：将含氟MOF晶体进行碳化处理，得到所述氟化碳材料；所述含氟MOF晶体的制备原料包括镍盐和氟苯二甲酸。本发明利用“预先氟化前驱体”的方法将引入氟元素的步骤前置化，即先在有机单体中引入氟元素，再进行聚合，并通过条件控制，在后续的碳化过程中保留氟元素。采用镍盐和氟苯二甲酸作为原料，经溶剂热反应得到含氟MOF晶体，碳化后获得含均匀分布的C(sp2)‑F键放电活性中心的氟化碳材料，其导电性良好，用作正极材料时有利于放电产物的分解，实现正极材料的循环利用，可用于制备可充电的二次锂‑氟化碳电池。
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