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一个二维的金属有机框架作为先进存储的有前途的阴极

Anna Zhou¹, Junyang Zheng¹, Chengxi Lei¹

¹National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Guangdong Provincial International Joint Research Center for Energy Storage Materials, School of Chemistry, South China Normal University, Guangzhou, 510006, China.

Chemistry (Weinheim an der Bergstrasse, Germany)

|January 3, 2024

概括

研究人员开发了一种新的2D甲基金属有机框架 (2D CaAQDC MOF) 来改进离子电池 (LIB). 这种MOF材料有效地防止活性物质溶解,增强电池容量和稳定性.

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:

作为离子电池 (LIB) 的电极材料,因其高的理论容量和丰富性,化衍生物显示出前景.
一个主要的挑战是,在有机电解质中溶解氨酸活性物质,导致循环过程中容量迅速衰减.

研究的目的:

通过防止活性物质溶解,为LIBs开发一种稳定的基于 antraquinone 的电极材料.
提高 antraquinone 电极材料的电化学性能和循环稳定性.

主要方法:

使用简单的热水方法制造一个二维的甲基2,3-二碳氧金属有机框架 (2D CaAQDC MOF).
在LIB中对2D CaAQDC MOF作为阴极材料进行电化学测试,评估不同电流密度的特定容量,循环稳定性和性能.

主要成果:

2D CaAQDC MOF有效地抑制了antraquinone在电解质中的溶解,促进了离子扩散.
在200个循环后,CaAQDC电极在50 mA/g下表现出~100 mAh/g的特定容量,显示出良好的循环稳定性.
在200mA/g的高电流密度下,达到约60mAh/g的特定容量.

结论:

CaAQDC MOF的二维协调聚合物结构成功抑制了 antraquinone 溶解并增强了结构稳定性.
这种分子设计策略显著改善了LIB应用中antraquinone的电化学性能.
这些发现为设计下一代储能器件的稳定有机电极材料提供了可行的方法.

关键词:

离子电池是一种离子电池.这是一种氨酸 (Anthraquinone).充电和放电的性能表现.溶解溶解是一种金属有机框架金属有机框架

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