Test method and test device of permeability of diaphragm quadrivalence vanadium ion
A technology of ion penetration and testing method, applied in the field of testing vanadium ion permeability of diaphragm, can solve the problem of large thickness of retention layer at the membrane-liquid interface, and achieve the effect of eliminating ion diffusion polarization layer, good sealing and reducing error.
Active Publication Date: 2015-02-25
辽宁科京新材料有限公司
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Problems solved by technology
However, at present, most of the tests for the permeability of vanadium ions are static or magnetically stirred on the left and right sides of the solution. Although the magnetic stirrer is compared with the static method, the thickness of the ion diffusion polarized layer on both sides of the membrane is reduced, but The thickness of the stagnant layer at the membrane-liquid interface is still large
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[0035] The present embodiment tests the permeability of vanadium (IV) ions with the diaphragm as an example, and the specific test method:
[0036] Cut a diaphragm 1 with a length of 70mm, a width of 90mm, a thickness of 9mm, and an effective area of 40mm×50mm; cut a rubber pad with a length of 70mm, a width of 90mm, and an effective area of 40mm×50mm in the middle, for use on both sides of the diaphragm 1 On the rubber pad, the whole is placed between the left liquid flow frame 2 and the right liquid flow frame 3, and is clamped with the left splint 4 and the right splint 5.
[0037] The test is carried out in the way of liquid flow in and out of the diaphragm parallel to the direction of the liquid, and the test is carried out with two half-cells. The initial concentration of vanadium(IV) ions in the right half cell (right flow box) is 1.5mol / LVOSO 4 +2mol / LH 2 SO 4 , with a volume of 150ml. The initial concentration in the left half pool (left flow box) is 1.5mol / LM...
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The invention belongs to the field of vanadium batteries, and particularly relates to a test method and a test device of the permeability of diaphragm vanadium (IV) ion for vanadium batteries. The test is carried out in two half pools by a parallel diaphragm liquid flow method in the liquid in-out direction, wherein the right half pool is vanadium IV ion solution, the left half pool is MgSO4 solution, the pool is separated by a diaphragm to be tested; the solution in the two half pools flows in from one side of a flowing liquid frame parallel to a diaphragm and flows out from the other side of the flowing liquid frame parallel to the diaphragm under the action of an external pump; the liquid flows in a circulating manner; a clamp which can be screwed tightly is clamped on a rubber hose; and the concentration of vanadium ion (IV) in the left half pool is calculated by using an ultraviolet spectrophotometer after a period of operation. The test device mainly comprises a diaphragm, a left flowing liquid frame, a right flowing liquid frame, a left splint and a right splint. By adopting the method and the device, the error is reduced, the measuring precision is improved, and the vanadium (IV) iron permeability can be tested accurately. The device is simple in structure, easy to process, convenient to assemble and disassemble and good in tightness.
Description
technical field [0001] The invention relates to the field of vanadium batteries, in particular to a method and a device for testing the vanadium (IV) ion permeability of a diaphragm used in a vanadium battery. Background technique [0002] The development of new energy sources such as wind energy and solar energy is an important way to solve the shortage of energy resources and represents the direction of future energy development. However, subject to time and geographical dependence, off-grid wind and solar power generation must use energy storage systems, otherwise it is difficult to use all-weather; and directly connected to the grid must also use energy storage systems to adjust the peak and frequency of the grid, otherwise it will affect the power grid. Power and frequency pack a big punch. Therefore, efficient and large-scale energy storage technology has become the key core of its development and application. [0003] Vanadium battery (Vanadium redox flow battery) i...
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IPC IPC(8): G01N15/08
Inventor 赵丽娜赵焕刘建国严川伟
Owner 辽宁科京新材料有限公司