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Redox-Active Two-Dimensional Tetrathiafulvalene-Copper Metal–Organic Framework with Boosted Electrochemical Performances for Supercapatteries
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-03-08 , DOI: 10.1021/acs.inorgchem.3c00140 Zhi-Ruo Zhang 1 , Zhou-Hong Ren 1 , Chen-Yue Luo 1 , Li-Jun Ma 1 , Jie Dai 1 , Qin-Yu Zhu 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-03-08 , DOI: 10.1021/acs.inorgchem.3c00140 Zhi-Ruo Zhang 1 , Zhou-Hong Ren 1 , Chen-Yue Luo 1 , Li-Jun Ma 1 , Jie Dai 1 , Qin-Yu Zhu 1
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Metal–organic frameworks (MOFs) have attracted noticeable attention as promising candidates for electrochemical energy storage. However, the lack of electrical conductivity and the weak stability of most MOFs result in poor electrochemical performances. Here, a tetrathiafulvalene (TTF)-based complex, formulated as [(CuCN)2(TTF(py)4)] (1) (TTF-(py)4 = tetra(4-pyridyl)-TTF), is assembled by in situ generation of coordinated CN– from a nontoxic source. Single-crystal X-ray diffraction analysis reveals that compound 1 possesses a two-dimensional layered planar structure, which is further stacked in parallel to form a three-dimensional supramolecular framework. The planar coordination environment of 1 is the first example of a TTF-based MOF. Attributed to the unique structure and redox TTF ligand, the electrical conductivity of 1 is significantly increased by 5 orders of magnitude upon iodine treatment. The iodine-treated 1 (1-ox) electrode displays typical battery-type behavior through electrochemical characterizations. The supercapattery based on the 1-ox positrode and AC negatrode presents a high specific capacity of 266.5 C g–1 at a specific current of 1 A g–1 with a remarkable specific energy of 62.9 Wh kg–1 at a specific power of 1.1 kW kg–1. The excellent electrochemical performance of 1-ox is one of the best among those reported supercapatteries, demonstrating a new strategy for developing MOF-based electrode materials.
中文翻译：
具有氧化还原活性的二维四硫富瓦烯-铜金属-有机骨架，可提高超级电池的电化学性能
金属有机框架（MOFs）作为电化学储能的有前途的候选者引起了人们的广泛关注。然而，大多数 MOFs 缺乏导电性和稳定性差，导致其电化学性能较差。在这里，基于四硫富瓦烯 (TTF) 的复合物，配制为 [(CuCN) 2 (TTF(py) 4 )] ( 1 ) (TTF-(py) 4 = tetra(4-pyridyl)-TTF)，通过以下方式组装从无毒来源原位生成协调的 CN 。单晶 X 射线衍射分析表明化合物1具有二维层状平面结构，进一步平行堆叠形成三维超分子骨架。1的平面协调环境是基于 TTF 的 MOF 的第一个示例。由于独特的结构和氧化还原 TTF 配体， 1的电导率在碘处理后显着提高了 5 个数量级。经碘处理的1 ( 1-ox ) 电极通过电化学表征显示出典型的电池型行为。基于1-ox正极和交流负极的超级电池在 1 A g –1的比电流下具有 266.5 C g –1的高比容量在 1.1 kW kg –1的比功率下具有 62.9 Wh kg –1的显着比能量。1-ox优异的电化学性能是已报道的超级电池中最好的之一，展示了开发基于 MOF 的电极材料的新策略。
更新日期：2023-03-08
中文翻译：
具有氧化还原活性的二维四硫富瓦烯-铜金属-有机骨架，可提高超级电池的电化学性能
金属有机框架（MOFs）作为电化学储能的有前途的候选者引起了人们的广泛关注。然而，大多数 MOFs 缺乏导电性和稳定性差，导致其电化学性能较差。在这里，基于四硫富瓦烯 (TTF) 的复合物，配制为 [(CuCN) 2 (TTF(py) 4 )] ( 1 ) (TTF-(py) 4 = tetra(4-pyridyl)-TTF)，通过以下方式组装从无毒来源原位生成协调的 CN 。单晶 X 射线衍射分析表明化合物1具有二维层状平面结构，进一步平行堆叠形成三维超分子骨架。1的平面协调环境是基于 TTF 的 MOF 的第一个示例。由于独特的结构和氧化还原 TTF 配体， 1的电导率在碘处理后显着提高了 5 个数量级。经碘处理的1 ( 1-ox ) 电极通过电化学表征显示出典型的电池型行为。基于1-ox正极和交流负极的超级电池在 1 A g –1的比电流下具有 266.5 C g –1的高比容量在 1.1 kW kg –1的比功率下具有 62.9 Wh kg –1的显着比能量。1-ox优异的电化学性能是已报道的超级电池中最好的之一，展示了开发基于 MOF 的电极材料的新策略。
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