用于高性能离子电池的多个活位的合金属有机框架的现场建造
Xi Su1, Linqi Cheng2, Xiaoli Yan1
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
Journal of the American Chemical Society
|May 16, 2025
概括
研究人员为离子电池 (PIB) 开发了一种新的二维铜金属有机框架 (Cu-HBB-MOF). 这种先进的材料提供了高容量和出色的循环稳定性,解决了当前PIB技术的关键挑战.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 由于导电性和表面积,二维合金属有机框架 (2D c-MOF) 对离子电池 (PIB) 是有前途的.
- 目前用于PIB的2Dc-MOF阴极通常具有较低的特定容量和较差的循环稳定性.
研究的目的:
- 设计和合成一种具有提高 PIB 阴极性能的新型 2D c-MOF.
- 研究一种新的六西胺配体 (6OH-HBB) 构建高性能MOF电极的潜力.
主要方法:
- 合成了一种高产量 (93%) 的六西胺配体 (6OH-HBB).
- 使用现场金属协调诱导的平面化策略构建了一个2D Cu-HBB-MOF.
- 评估了Cu-HBB-MOF作为PIBs的阴极材料的电化学性能.
主要成果:
- 在0.2Ag-1下,Cu-HBB-MOF的初始容量高达228.1mAhg-1.
- 经过2500次循环后,在5.0 A g-1下表现出优异的长期循环稳定性,可逆容量为103.6 mA h g-1.
- 每个周期的低容量损失和100%的库伦比效率.
结论:
- 具有多站点功能的2D c-MOF显示了高性能PIB阴极的巨大潜力.
- 这项工作为下一代储能系统开发基于MOF的先进材料提供了洞察力.
- 开发的Cu-HBB-MOF在容量和稳定性方面超过了许多报告的多孔材料.
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