A modification method for proton exchange membrane used in all-vanadium redox flow battery
A technology of all-vanadium redox flow battery and proton exchange membrane, which is applied in fuel cells, regenerative fuel cells, circuits, etc., can solve the problems of uneven texture of composite membranes, reduce the mechanical and chemical properties of composite membranes, and achieve the modification method Simple and reliable, improved proton conductivity and selectivity, and strong operability
Inactive Publication Date: 2019-01-29
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
[0006] In the previous modification of doped zeolite (such as Ferrierite, Mordenite zeolite), zeolite often agglomerated and agglomerated, and the texture of the prepared composite membrane was not uniform, so the mechanical and chemical properties of the composite membrane were reduced.
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Embodiment 1
[0051] like figure 1 As shown, embodiment 1 provides a kind of modification method for the proton exchange membrane of all-vanadium redox flow battery, and it comprises the following steps:
[0052] S1. Preparation of Na-A zeolite: Using sodium silicate and aluminum hydroxide as silicon source and aluminum source for preparing Na-A zeolite respectively, Na-A zeolite is prepared by hydrothermal synthesis method, wherein each reactant The molar ratio is as follows: 18NaOH: 1.5SiO 2 : 2NaAlO 2 : 200H 2 O.
[0053] Specifically, step S1 includes the following steps:
[0054] S11. Weigh 28.8g of sodium hydroxide and dissolve it in 144g of deionized water, and divide it into two equal parts. S12. Weigh 6.56g of sodium metaaluminate and pour it into one part of the sodium hydroxide solution in step S11, and heat it at 90° C. with a constant temperature heating magnetic stirrer to completely dissolve it. S13. Take 12 g of liquid-phase silica and drop it into another portion of t...
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Abstract
The invention relates to a modification method of a proton exchange membrane for an all-vanadium liquid flow battery, and relates to the technical field of batteries. The modification method comprises the following steps: S1, preparation of Na-A zeolite: taking sodium silicate and aluminum hydroxide as a silicon source and an aluminum source of the Na-A zeolite respectively, and preparing the Na-A zeolite by a hydrothermal synthesis method; S2, preparation of NH4-A zeolite: carrying out ion exchange treatment of the Na-A zeolite, to obtain the NH4-A zeolite; S3, preparation of H-A zeolite: treating the NH4-A zeolite by a water steam heating method to prepare the H-A zeolite; S4, preparation of an SPEEK raw material: preparing the SPEEK raw material by a post-sulfonation method; and S5, preparation of an SPEEK composite film: doping the SPEEK raw material with the H-A zeolite, to prepare the SPEEK composite film. The modified method is simple, reliable and high in operability; and the SPEEK composite film prepared by the method has the advantages of uniform distribution, and better proton electric conductivity, vanadium ion permeability, selectivity and other properties.
Description
technical field [0001] The invention relates to a method for modifying a proton exchange membrane used in an all-vanadium redox flow battery, and relates to the technical field of batteries. Background technique [0002] As an excellent energy storage device, all-vanadium redox flow battery is characterized by large capacity and convenient capacity expansion. The vanadium redox flow battery has a simple structure, mainly composed of positive and negative electrodes, proton exchange membrane, electrolyte storage system and pump system. Among them, the proton exchange membrane is the key material of the all-vanadium redox flow battery. Its main function is to isolate the positive and negative electrolyte solutions, prevent the interpenetration of vanadium ions in different valence states, and transfer charges through the free migration of hydrogen ions in the membrane. An ideal proton exchange membrane should have the following characteristics: low vanadium ion transmission r...
Claims
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IPC IPC(8): H01M8/1088H01M8/1048H01M8/18
CPCH01M8/1048H01M8/1088H01M8/188Y02E60/50
Inventor 武俊伟刘彦辰安德鲁·贝克张强崔彦辉
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL