{P6Mo18O73}-based metal organic framework porous electrode material and preparation method and application thereof

Abstract

The invention relates to the technical field of supercapacitor electrode materials, in particular to a {P6Mo18O73}-based metal organic framework porous electrode material and a preparation method and application thereof. A double-ligand strategy is applied, a functional metal organic unit is introduced into a {P6Mo18O73} system, POMOCP with a special interlayer structure and rich pore channels is constructed, the synthesized polymer serves as a pseudocapacitor electrode material, the energy storage property of the pseudocapacitor electrode material is researched, the effects of a plurality of oxidation-reduction active centers in the metal organic unit and {P6Mo18O73} are exerted, the specific surface area of the material is increased, the stability and the conductivity of the material in an electrolyte solution are improved, the regulation and control on the super-electric performance of the {P6Mo18O73} type POMs are realized from the molecular level, the capacitive performance of the material is improved, and a theoretical and experimental basis is provided for the application of the {P6Mo18}-type cluster compound in the field of supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, in particular to a {P 6 Mo 18 o 73}-based metal-organic framework porous electrode materials and their preparation methods and applications. Background technique [0002] Electrode materials are the core components of supercapacitors. To obtain supercapacitors with excellent performance, it is necessary to conduct research on the design and controllable preparation of electrode materials. Polyoxometalates (POMs) are a class of nanoscale polynuclear metal oxygen clusters, and transition metal oxides RuO 2 , MnO 2 , V 2 o 5 Compared with POMs, which have better molecular conductivity and highly reversible multi-electron redox ability, they can quickly receive or transfer electrons without changing the host structure, and their oxidation can be adjusted by changing heteroatoms or coordination atoms. If the reduction potential of POMs can take full advantage of the c...

AI Technical Summary

Problems solved by technology

However, there are few types of {P6Mo18} POMs reported so far, and most of them are zero-dimensional structures. The inability to combine with metal-organic units hinders the further functionalization of such POMs

The main reason is that this type of POMs has few active sites for bonding and is located on the same side of the basket, while {P6Mo18O73 }-type POMs are very bulky; two unfavorable factors cause {P6Mo18O73}-type compounds to have larger Steric hindrance, making it difficult to combine with metal-organic units to form polyacid-based MOF materials

[0005] On the other hand, although the classic Keggin and Dawson type POMs have been used as supercapacitor electrode materials, most researches have focused on the composite with conductive polymers or porous carbon materials; and in the prior art {P 6 Mo 18 o 73 }-based MOF materials have not been reported yet, while {P 6 Mo 18 o 73 The research on the performance of }-type POMs is limited to magnetism, photo / electrocatalysis and fluorescence, etc., and the research on its superelectric properties is also blank, so the functional metal-organic unit is introduced into {P 6 Mo 18 o 73 }The system construction of porous bonded polymer supercapacitor electrode materials is a very challenging and promising work. It has never been involved in the field of polyacid synthesis, and it belongs to the field to be developed.

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