一个导电性的基于Cu的金属有机框架带带,具有高密度的反氧活性中心作为稳定高容量的离子电池的阴极
Menghua Yang1, Ying Wang1, Yan-Fang Huang1
1College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry, Jinan University, Guangzhou, 510632, China.
Angewandte Chemie (International ed. in English)
|December 3, 2024
概括
一个新的1D铜基金属有机框架 (Cu-MOF) 证明了离子电池 (LIB) 的高容量和可循环性. 这种先进的阴极材料提供了出色的电子导电性和稳定性,克服了当前MOF电极的局限性.
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
- 纳米技术纳米技术
背景情况:
- 导电性的铜基金属有机框架 (Cu-MOF) 是离子电池 (LIB) 的有希望的阴极材料.
- 目前的Cu-MOF应用受到容量不足和循环能力差的阻碍.
- 开发强大的高性能MOF阴极对于推进电池技术至关重要.
研究的目的:
- 为LIB应用合成和描述一种新型的一维Cu-MOF (DDA-Cu).
- 研究DDA-Cu阴极的电化学特性,包括容量,可循环性和导电性.
- 为了评估DDA-Cu在苛刻条件下的性能,例如精简的电解质环境.
主要方法:
- 一个1D Cu-MOF的合成,其中有一个扩展的 π-d 合协调带 (DDA-Cu).
- 材料结构,氧化还原活性和电子导电性的表征.
- 在LIBs中测试DDA-Cu作为阴极材料的电化学测试,包括循环稳定性和精电解质中的性能.
主要成果:
- DDA-Cu具有353 mAh g-1的高容量,在0.05 A g-1.1时使用.
- 实现了特殊的循环性,在1000个循环后保持了78%的容量.
- 这种材料在精益电解质 (2μL mg-1) 中表现出色,具有高质量负荷 (6.8 mg cm-2).
结论:
- 1D DDA-Cu材料为LIBs提供了一个稳定的,高容量的阴极.
- 它独特的π-d联结构增强了离子储存,结构稳定性和电子导电性.
- DDA-Cu超越了现有的MOF电极,并显示出高性能,资源独立的LIB的潜力.
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