对于高性能LIBs的现场电聚合金属有机协调聚合物的金属节点的调节
Chen-Xing Zhang1, Shilin Mei1, Cong Cao1
1State Key Laboratory of Explosion Science and Safety Protection, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 17, 2025
概括
金属有机协调聚合物 (MOP) 对电池来说是有希望的. 在这些材料中用铁取代显著提高了电化学性能,容量和稳定性,指导了未来的阴极开发.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
背景情况:
- 金属有机协调聚合物 (MOP) 是电池的电活性材料.
- 氧化还原活性有机分子和金属离子是关键成分.
研究的目的:
- 研究MOP中的结构电化学性能关系.
- 模型MOPs使用Fe和Co复合物与特皮里丁-三烯胺配体.
- 确定中心金属原子对电池性能的影响.
主要方法:
- 合成和表征Fe和Co基的MOPs.
- 评估电化学性能 (容量,稳定性,速度能力).
- 进行了密度函数理论 (DFT) 分析.
主要成果:
- 聚铁电极显示出高可逆容量 (272.5 mAh g-1) 和出色的循环稳定性 (在4000个循环后保持83.1%).
- 聚碳电极表现出较低的容量 (107 mAh g-1) 和较低的稳定性 (4000 个循环后的保留率为 38.7%).
- DFT揭示了金属中心对电子密度,氧化还原活性和离子亲和力的影响.
结论:
- 金属中心的选择极大地影响MOP电化学性能.
- 与基MOP相比,基于铁的MOP提供了优越的电池性能.
- 这些发现指导了资源友好的MOP阴极材料的开发.
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