A kind of cobalt complex and its preparation method and application as proton conduction material

A technology of cobalt complexes and ligands is applied in the application field of cobalt complexes as proton conductive materials, which can solve problems such as insufficient understanding of electrical conductivity, and achieve the effects of excellent proton conductivity, simple operation and simple preparation method.

Active Publication Date: 2020-09-01
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, complex proton-conducting materials with water molecules as the medium, such as [Li 3 (HPA)(H 2 O) 4 ]·H 2 O, Ca-PiPhtA-I, Zn(m-H 6 L) and La(H 5 DTMP)·7H 2 O and others mainly study proton conduction at room temperature, and cannot fully understand its conductivity at higher temperatures

Method used

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  • A kind of cobalt complex and its preparation method and application as proton conduction material
  • A kind of cobalt complex and its preparation method and application as proton conduction material
  • A kind of cobalt complex and its preparation method and application as proton conduction material

Examples

Experimental program
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Effect test

Embodiment 1

[0046] 0.4g H 6 TTHA, 0.64g 4,4′-bipyridine and 0.8g Co(NO 3 ) 2 ·6H 2 O was added to 25 mL of deionized water. Then place it in an autoclave at 100° C. for 48 hours at a constant temperature. After cooling down to room temperature, crystals are precipitated, and the crystals are washed with deionized water for several times to obtain a cobalt complex. The cobalt complex is a pink blocky crystal. Elemental analysis data C 80 h 110 N 22 o 44 co 3 , Theoretical: C, 42.5; H, 4.9; N, 13.63%. Found: C, 42.9; H, 4.54; N, 13.25%. Main infrared data (KBr, cm -1 ): 3259(s); 2940(w); 1704(s); 1605(m); 1549(m); 1482(s); 1318(s).

[0047] Analyze the single crystal structure of the cobalt complex prepared in Example 1 of the present invention, collect the single crystal diffraction data with a Bruker Smart CCD diffractometer, and use a graphite monochromator to monochromatize Mo / kα rays Scan, obtain following result: the cobalt complex that the embodiment of the present in...

Embodiment 2

[0049] 0.4g H 6 TTHA, 0.64g 4,4′-bipyridine and 0.8g Co(NO 3 ) 2 ·6H 2 O was added to 25 mL of deionized water. Then place it in an autoclave at 140° C. for 72 hours at a constant temperature. After cooling to room temperature, crystals precipitate out. The crystals are washed with deionized water several times to obtain a cobalt complex. The cobalt complex is a pink blocky crystal.

[0050] The cobalt complex prepared in Example 2 of the present invention was analyzed by X-ray diffraction, and its diffraction peaks were consistent with the simulated diffraction peaks obtained by single crystal analysis in Example 1 of the invention, such as image 3 As shown, it is illustrated that the same substance is obtained according to the preparation methods of Example 1 and Example 2.

[0051] In order to investigate the proton conductivity of the cobalt complex prepared in the present invention, about 50 mg of the cobalt complex prepared in Example 2 of the present invention was...

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Abstract

The invention relates to a cobalt coordination compound and a preparation method thereof, and applications as a proton conducting material, wherein the molecular formula of the cobalt coordination compound is {[Co3(H3TTHA)2(4,4'-bipy)5(H2O)8].12H2O}n, H3TTHA is a three-proton-removed ligand 1,3,5-triazine-2,4,6-triamine hexaacetic acid (H6TTHA), 4,4'-bipy is a 4,4'-bipyridine molecule, and the preparation method comprises: adding H6TTHA, 4,4'-bipyridine and Co(NO3)2.6H2O in deionized water, and carrying out a hydrothermal reaction. According to the present invention, the prepared cobalt coordination compound contains a large amount of water molecules and carboxylic acid groups and rich hydrogen bond network in the structure, can be used as the proton conducting material for water mediums,has a proton conductivity of close to 10<-3> S.cm<-1> at 353 K and 98% RH, and is a proton conducting material with great application value.

Description

technical field [0001] The invention relates to a cobalt complex proton conduction material, in particular to a metal ion with cobalt (II) as the center, 4,4'-bipyridine and H 6 TTHA is a cobalt complex composed of ligands, and also relates to a preparation method of the cobalt complex and an application of the cobalt complex as a proton conduction material, belonging to the technical field of fuel cells. Background technique [0002] Proton-conducting materials have attracted extensive attention due to their potential applications in electrochemical devices, sensors, and fuel cells. Currently, the commercialized perfluorosulfonic acid hydration membrane has a proton conductivity of 10 at 60-80 °C and 98% RH. -2 -10 -1 S cm -1 . However, the price of perfluorosulfonic acid is very high, and it is unstable when used above 100°C, which seriously affects the proton conduction effect. In addition, as an amorphous polymer, perfluorosulfonic acid is difficult to obtain its st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00H01M8/1018
CPCC08G83/008H01M8/1018Y02E60/50
Inventor 侯浩波冯露周旻李嘉豪陈畅董祎挈
Owner WUHAN UNIV
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