Preparation and application of octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline material

A phosphomolybdic acid, magic cube-like technology, which is applied to the preparation and application of octahedral magic cube Keggin copper phosphomolybdate-based crystalline materials, can solve the problems of low electrical conductivity and poor stability.

Active Publication Date: 2022-07-29
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that multi-salt acid has poor stability in solution and low conductivity as the supercapacitor electrode material

Method used

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  • Preparation and application of octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline material
  • Preparation and application of octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline material
  • Preparation and application of octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline material

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specific Embodiment approach 1

[0027] Embodiment 1: This embodiment describes an octahedral cube-shaped Keggin-type copper phosphomolybdate-based crystalline material, and the molecular formula of the crystalline material is C 48 H 52 N 16 P 2 CuMo 24 O 84 , its basic structural unit contains a metal copper ion, two 1-imidazole-1-methylene-1H-benzotriazole organic ligands, a PMo 12 O 40 3- polyacid anion and two water molecules. Among them, the copper ions coordinate with the coordination water O1W and the nitrogen atoms N2 and N4 in the organic ligands, respectively, forming a pinwheel-shaped metal-organic ligand structural unit Cu(H 2 O) 2 (pybta) 4 , the hydrogen atoms on the oxygen atoms O1W and O2W of the water clusters in the molecule are respectively associated with PMo 12 O 40 3- The terminal oxygen O37, O18 and bridging oxygen O31 on the polyacid anion form hydrogen bonds. Through hydrogen bonding, PMo 12 O 40 3- The polyacid clusters are distributed at the six vertices of the octahe...

specific Embodiment approach 2

[0028] Specific embodiment 2: The preparation method of an octahedral cube-shaped Keggin type copper phosphomolybdate-based crystalline material supercapacitor electrode material of the present embodiment is completed according to the following steps:

[0029]1. Prepare a reaction solution with a pH value of 2.5 to 3.0: add phosphomolybdic acid, copper acetate, 1-pyridine-3-methylene-1H-benzotriazole into distilled water and stir evenly, then the suspension The pH value of the solution is adjusted to 2.5-3.0 to obtain a reaction solution with a pH value of 2.5-3.0;

[0030] The molar ratio of phosphomolybdic acid and copper acetate described in step 1 is: 1.0:(6.0~7.0);

[0031] The molar ratio of the phosphomolybdic acid described in the step 1 and 1-pyridine-3-methylene-1H-benzotriazole is: 1.0:(0.9-1.1);

[0032] The volume ratio of the amount of phosphomolybdic acid described in step 1 to the volume of distilled water is: 0.16 mmol: 15 mL.

[0033] 2. Preparation of an o...

specific Embodiment approach 3

[0036] Embodiment 3: The method for preparing an octahedral cube-like Keggin-type copper phosphomolybdate-based crystalline material described in step 1 of Embodiment 2, the 1-pyridine-3-methylene-1H-benzo The molar ratio of triazole, copper acetate and phosphomolybdic acid is 1.0:(6.0-7.0):1.0.

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Abstract

The invention relates to preparation and application of an octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline material. The invention aims to solve the problems of poor stability and low conductivity of some polyacid crystalline materials as supercapacitor electrode materials in a solution, and provides a preparation method of a supercapacitor electrode material capable of improving the capacitive performance of the polyacid crystalline materials. The chemical formula of the octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline state material disclosed by the invention is [Cu (H2O) 2H4 (pybta) 4] (PMo12O40) 2.2 H2O, wherein pybta is 1-pyridine-3-methylene-1H-benzotriazole. The invention further discloses a preparation method of the octahedral Rubik's cube-shaped Keggin type copper phosphomolybdate-based crystalline state material. The synthesis method comprises the following steps: adding phosphomolybdic acid, copper acetate and pybta into distilled water, uniformly stirring, adjusting the pH value, and reacting for 4 days at the temperature of 140 DEG C to obtain an electrode material prepared from a crystalline material with the specific capacitance value of 556 F / g under the current density of 1A / g. And a technical route is provided for constructing an octahedral magic cube-shaped Keggin type copper phosphomolybdate-based crystalline state material to improve the super-electrical property of the octahedral magic cube-shaped Keggin type copper phosphomolybdate-based crystalline state material.

Description

technical field [0001] The invention relates to the preparation and application of an octahedral magic cube-shaped Keggin-type copper phosphomolybdate-based crystalline material. Background technique [0002] Supercapacitors are physical charge transfer, fast charging and discharging, and are not affected by temperature, so they have a longer life, high power density and a wide temperature range, and are low-cost, non-toxic and pollution-free green energy storage. It is one of the energy storage devices that has received a lot of attention at present. Whether it is a small-capacity precision energy storage or a large-scale electric energy storage, it exhibits excellent characteristics from independent energy storage to hybrid energy storage with batteries or fuel cells. [0003] Polyoxometalates (POMs) (also known as polyacids) are nano-oxide clusters with reversible oxidation activity. They have the characteristics of modifiable structure and tunable physical and chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/54C30B7/14H01G11/30H01G11/86
CPCC30B29/54C30B7/14H01G11/30H01G11/86
Inventor 于晓晶庞海军王新铭谭立超杨桂欣
Owner HARBIN UNIV OF SCI & TECH
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