Metal coordination supramolecular grid and three-dimensional graphene block composite material, preparation method and application, and supercapacitor electrode

Abstract

The invention relates to the field of a composite material, and discloses a metal coordination supramolecular grid and three-dimensional graphene block composite material, a preparation method and an application, and a supercapacitor electrode. The metal coordination supramolecular grid and three-dimensional graphene block composite material is compounded by the metal coordination supramolecular grid and the three-dimensional-structure graphene block material; the composite material can be connected with different coordination units to form the metal coordination supramolecular grid to transfer charges; meanwhile, the metal coordination supramolecular grid also can be interacted with the modified three-dimensional graphene to form a conductive network so as to improve the overall electrical conductivity of the material, so that higher structural flexibility and charging-discharging reversibility can be achieved; therefore, the composite material has relatively high application potential used as the electrode material of the supercapacitor; and meanwhile, the invention also provides the preparation method and the application of the composite material, and the supercapacitor electrode.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to metal coordination supramolecular grid and three-dimensional graphene block-like composite materials, preparation methods, uses and supercapacitor electrodes. Background technique [0002] Coordination Supramolecular Networks (CSNs) is a new class of supramolecular materials, in which molecules form a three-dimensional network through weak interactions such as hydrogen bonds and / or π-π stacking. On the one hand, this type of material has abundant pores that are conducive to the transport of electrolyte ions, and on the other hand, it has metal ion active sites that can generate redox reactions. Moreover, since the supramolecular structural units are connected by weak interactions such as hydrogen bonds and van der Waals forces, it has better structural flexibility than coordination polymers connected with coordination bonds, and these weak interactions It has a certain self-re...

AI Technical Summary

Problems solved by technology

[0004] As ideal porous materials, coordination polymers and metal coordination supramolecular grids have the advantages of large specific surface area, and the internal channels can be adjusted and designed. They are theoretically very suitable as electrode materials for supercapacitors. Some of the structural units of the coordination polymer are connected by single bonds such as carboxyl groups, so that their electrical conductivity is generally poor. For example, Chinese patent ZL201080059630.6 discloses graphene oxide modified by coordination groups, which has the following molecular formula G(A-B )x; wherein, G represents graphene oxide, and A is a group with connection function: -(CH2)m-, -NH-, -S-, -O-Si(-CH2)m(-OR1)2- , -C(=O)-, -C(=O)-O-, -C(=O)-N-, -P(=O)2-O-, here m value is 1-12, R1 is H and C1-C12 alkyl groups; B is a coordination group, and the ratio of each graphene oxide unit to coordination group is 1:0.00001 to 1:0.5

Obviously, the coordinating group acts in the form of polycarboxylates in this invention, and its conductivity needs to be improved

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