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New Covalent Organic Square Lattice Based on Porphyrin and Tetraphenyl Ethylene Building Blocks toward High-Performance Supercapacitive Energy Storage
Chemistry of Materials ( IF 7.2 ) Pub Date : 2021-10-26 , DOI: 10.1021/acs.chemmater.1c02973 Bidhan Chandra Patra 1, 2 , Santanu Bhattacharya 1, 2, 3
Chemistry of Materials ( IF 7.2 ) Pub Date : 2021-10-26 , DOI: 10.1021/acs.chemmater.1c02973 Bidhan Chandra Patra 1, 2 , Santanu Bhattacharya 1, 2, 3
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Covalent organic frameworks (COFs) are of increasing interest in the field of materials science. Polymerizations of the topologically fitted monomers into two-dimensional (2D) structures with a periodic order often make them crystalline. The existence of this structural periodicity and regular pores makes them effective for facile ion transport and storage applications. We report herein a new porphyrin-based 2D COF using Schiff base condensation reaction between 5,10,15,20-tetrakis(para-amino phenyl) porphyrin (TAPP) and 1,1,2,2-tetrakis(4-formyl-(1,1′-biphenyl))-ethane (TFBE) under solvothermal conditions. The as-prepared porphyrin-tetraphenyl ethylene COF (PT-COF) possesses high crystallinity along with a large surface area of 1998 m2 g–1. The PT-COF electrode was used as a supercapacitive energy storage system with the combination of an electrochemical double-layer capacitor and pseudocapacitor. This COF showed a maximum specific capacitance of 1443 F g–1 at a current density of 1 A g–1 in 0.5 M H2SO4 with 91% capacity retention after 3000 cycles. The presence of the porphyrin unit inside the framework causes good redox activity in the acidic media. During the cathodic scan, the porphyrin unit [H2P] got protonated, followed by 2e– reduction to form a 20π-electronic system [H4P]. Thus, the reversible proton accepting capability of the redox-active porphyrin-decorated PT-COF could allow for use as an energy storage material as a supercapacitor under acidic conditions. A high power density of 7.3 kW kg–1 was observed at a high scan rate, which outperforms most of the other COF-based electrode materials used for high storage performance.
中文翻译：
基于卟啉和四苯基乙烯构建块的新型共价有机方格用于高性能超级电容储能
共价有机骨架 (COF) 在材料科学领域越来越受到关注。拓扑拟合单体聚合成具有周期性顺序的二维 (2D) 结构通常会使它们结晶。这种结构周期性和规则孔的存在使它们对于简单的离子传输和存储应用非常有效。我们在此报告了一种新的基于卟啉的 2D COF，使用 5,10,15,20-四（对氨基苯基）卟啉（TAPP）和 1,1,2,2-四（4-甲酰基- (1,1'-联苯))-乙烷 ( TFBE ) 在溶剂热条件下。制备的卟啉-四苯基乙烯COF（PT-COF) 具有高结晶度以及 1998 m 2 g –1的大表面积。的PT-COF电极用作与电化学双电层电容器和赝的组合的超级电容的能量储存系统。这表明COF 1443 F G的最大比电容-1在将1 g的电流密度-1在0.5 MH 2 SO 4 91％的容量保持3000次循环之后。框架内卟啉单元的存在导致在酸性介质中具有良好的氧化还原活性。在阴极扫描期间，卟啉单元 [ H2P ] 被质子化，然后是 2e –还原以形成20π电子体系[ H4P ]。因此，氧化还原活性卟啉修饰的PT-COF的可逆质子接受能力允许在酸性条件下用作储能材料作为超级电容器。在高扫描速率下观察到7.3 kW kg –1 的高功率密度，优于大多数其他用于高存储性能的基于 COF 的电极材料。
更新日期：2021-11-09
中文翻译：
基于卟啉和四苯基乙烯构建块的新型共价有机方格用于高性能超级电容储能
共价有机骨架 (COF) 在材料科学领域越来越受到关注。拓扑拟合单体聚合成具有周期性顺序的二维 (2D) 结构通常会使它们结晶。这种结构周期性和规则孔的存在使它们对于简单的离子传输和存储应用非常有效。我们在此报告了一种新的基于卟啉的 2D COF，使用 5,10,15,20-四（对氨基苯基）卟啉（TAPP）和 1,1,2,2-四（4-甲酰基- (1,1'-联苯))-乙烷 ( TFBE ) 在溶剂热条件下。制备的卟啉-四苯基乙烯COF（PT-COF) 具有高结晶度以及 1998 m 2 g –1的大表面积。的PT-COF电极用作与电化学双电层电容器和赝的组合的超级电容的能量储存系统。这表明COF 1443 F G的最大比电容-1在将1 g的电流密度-1在0.5 MH 2 SO 4 91％的容量保持3000次循环之后。框架内卟啉单元的存在导致在酸性介质中具有良好的氧化还原活性。在阴极扫描期间，卟啉单元 [ H2P ] 被质子化，然后是 2e –还原以形成20π电子体系[ H4P ]。因此，氧化还原活性卟啉修饰的PT-COF的可逆质子接受能力允许在酸性条件下用作储能材料作为超级电容器。在高扫描速率下观察到7.3 kW kg –1 的高功率密度，优于大多数其他用于高存储性能的基于 COF 的电极材料。
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