作为高性能离子电池的阴极的罗姆二维合金属有机框架
Meiling Qi1,2, Linqi Cheng3, Heng-Guo Wang3
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
Advanced materials (Deerfield Beach, Fla.)
|April 11, 2024
概括
这项研究介绍了Cu-TBA,一种新的形拓 2D 合金属有机框架 (2D c-MOF),作为离子电池 (SIB) 的高性能阴极. 它表现出增强的容量和特殊的循环稳定性,克服了以前材料的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 2D结合金属有机框架 (2D c-MOFs) 对储能具有前景,但面临着容量低和循环寿命差等挑战.
- 现有的2D c-MOF经常遭受活跃地点的不足利用,限制了它们的实际应用.
研究的目的:
- 为离子电池 (SIB) 开发一种新的2D c-MOF阴极材料,以提高电化学性能.
- 为了研究链接器设计 (狭窄的能量差距) 和拓 (圆角) 对电池性能的影响.
主要方法:
- 合成和表征Cu-TBA,一个2Dc-MOF与形拓和大结合单位.
- 对Cu-TBA作为SIB中的阴极材料进行电化学测试,包括容量,速率能力和循环稳定性测量.
- 与六边形对应物 (Cu-HHTP) 的比较,以突出性能差异.
主要成果:
- -TBA具有较高的特定表面积 (613 m2 g-1) 和金属带结构.
- 与六边形类似物相比,Cu-TBA显示出更高的可逆容量 (153.6 mAh g-1在50 mA g-1).
- 观察到异常的循环性,在1A g-1.1时3000个循环后,容量衰减最小.
结论:
- 在二维c-MOF中缩小有机链接器的能量差距是提高SIB电化学性能的有效策略.
- -TBA的形拓和大结合单位有助于其作为阴极材料的卓越性能.
- 这项工作扩大了2D c-MOF在先进的储能系统中的潜在应用.
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