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Mixed matrix membrane based on zeolite imidazole framework material as well as preparation and application of mixed matrix membrane

A technology of zeolite imidazole framework and mixed matrix membrane, which can be used in electrolytes, fuel cells, regenerative fuel cells, etc., can solve the problem that cannot meet the technical requirements of high power density, restrict the development of alkaline iron-based flow batteries, and cannot meet long-term operation. and other problems, to achieve the effect of excellent alkali resistance stability, high stability and high battery performance

Pending Publication Date: 2022-05-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production process of perfluorosulfonic acid cation-conducting membrane is complex and expensive (about 600-800 US dollars / square meter), which restricts the further development of alkaline iron-based flow batteries; in addition, the use of perfluorosulfonic acid cation-conducting membrane ( Nafion) assembled alkaline iron-based flow batteries have low voltage efficiency even under low working current density conditions (Table 1), which cannot meet the requirements of high power density and low-cost alkaline iron-based flow batteries in the future. heap technical requirements
In the alkaline iron-based flow battery environment, the quaternary amine groups on the traditional quaternary amine-type anion-conducting membrane will undergo Hoffman elimination (Hoffman elimination) and nucleophilic substitution (Nucleophilic substitution) reactions, leading to the stability of this type of membrane poor enough to meet its needs for long-term operation in alkaline iron-based flow batteries

Method used

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  • Mixed matrix membrane based on zeolite imidazole framework material as well as preparation and application of mixed matrix membrane
  • Mixed matrix membrane based on zeolite imidazole framework material as well as preparation and application of mixed matrix membrane
  • Mixed matrix membrane based on zeolite imidazole framework material as well as preparation and application of mixed matrix membrane

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Experimental program
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Effect test

Embodiment 1-5

[0033] Configuration 60mL, 0.036mol L -1 Zn(NO 3 ) 2 ·6H 2 O(0.6424g), 0.278mol L -1 The imidazole (1.1356g) solution of ethanol was used as a solvent (47.34g), and was stirred at room temperature for 0.5h and then transferred to a 120mL reaction kettle. 6 4- The selectivity factor for ions is 0.8×10 -4 cm 2 s -1 ) was placed in the solution and stirred for 0.5 h, and then hydrothermally reacted at 80 °C for 3 h to prepare a Daramic mixed matrix membrane filled with ZIF-8. The as-prepared ZIF-8 filled Daramic mixed matrix membrane was prepared with 3 mol L -1 Alkali treatment was performed to remove the silica in the membrane, and the resulting membrane was abbreviated as M1.

[0034] Using polyethersulfone (PES) and sulfonated polyetheretherketone (SPEEK) as raw materials, DMAc as solvent, a casting liquid with a solid content of 35wt% is configured, in which SPEEK accounts for the sum of the mass of polymer resin (PES and SPEEK) 10wt%. PES-SPEEK porous ion-conduc...

Embodiment 6-8

[0042] Using polyethersulfone (PES) and sulfonated polyetheretherketone (SPEEK) as raw materials, DMAc as solvent, a casting liquid with a solid content of 35wt% is configured, in which SPEEK accounts for the sum of the mass of polymer resin (PES and SPEEK) 8wt%. PES-SPEEK porous ion-conducting membrane (for Fe(CN) 6 4- The selectivity factor for ions is 0.85×10 -4 cm 2 s -1 ), abbreviated as M6.

[0043] Configuration 60mL, 0.024mol L -1 Zn(NO 3 ) 2 ·6H 2 O(0.4283g), 0.168mol L -1 Methylimidazole (0.8274g) solution, ethanol as solvent (47.34g), stirred at room temperature for 0.5h and then transferred to a 120mL reaction kettle, placed M6 film in the above solution and stirred for 0.5h, then hydrothermally reacted at 80°C 4h, a PES-SPEEK mixed matrix membrane filled with ZIF-8 was prepared, which was referred to as M7 for short.

[0044] Configuration 60mL, 0.024mol L -1 Zn(NO 3 ) 2 ·6H 2 O(0.4283g), 0.072mol L -1 Methylimidazole (0.3546g) solution, ethanol a...

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Abstract

The invention discloses a preparation method of a mixed matrix membrane based on a zeolite imidazole framework material and an application of the mixed matrix membrane in an alkaline flow battery, and the membrane is prepared by the following steps: placing a porous ion conducting membrane with lower ion selectivity (namely larger aperture) in a zeolite imidazole framework material precursor solution, and carrying out hydrothermal reaction for a certain time at a certain temperature; and generating a zeolite imidazole framework material solid matrix in situ in the porous ion conduction membrane. The zeolite imidazole framework material generated in situ in the membrane is filled in the holes of the porous ion conduction membrane, so that the ion selectivity of the membrane material is improved; on the other hand, the pore structure of the zeolite imidazole framework material can transfer ions, so that the membrane material keeps high ionic conductivity. The prepared mixed matrix membrane based on the zeolite imidazole framework material has good stability in an alkaline flow battery system, and can endow the battery with high battery performance.

Description

technical field [0001] The invention relates to a mixed matrix membrane based on a zeolite imidazole framework material and its preparation and application, in particular to the application of the membrane in an alkaline liquid flow battery system. Background technique [0002] Flow battery energy storage technology has the advantages of safety, reliability, long life and high efficiency, and has become one of the preferred technologies for large-scale energy storage. All-vanadium redox flow battery is one of the most mature flow battery technologies at present, but limited by the influence of vanadium resources and price, the cost of the battery is relatively high; in addition, the open circuit voltage of all-vanadium redox flow battery is relatively low ( 1.2V), the active material concentration is low, making the battery energy density low. Therefore, the development of a new generation of low-cost, high-energy-density flow battery systems has become a current research f...

Claims

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Application Information

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IPC IPC(8): C08J5/22H01M8/083H01M8/18C08L81/06
CPCC08J5/2287H01M8/083H01M8/188H01M2300/0091C08J2381/06C08J2487/00Y02E60/50
Inventor 袁治章李先锋段寅琦张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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