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Method for detecting content of impurity elements in electrolyte of vanadium cell

A technology of impurity elements and electrolytes, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve problems such as detection and analysis

Active Publication Date: 2013-04-17
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no detection of trace and trace impurity elements such as Cr, Fe, Mo, Ni, Co, Cu, Mn, Ti, Zn, Si, Al, As, P, Ca, Mg, Pb in the vanadium battery electrolyte method of analysis

Method used

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  • Method for detecting content of impurity elements in electrolyte of vanadium cell

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] Prepare the sample solution for the detection and analysis of the electrolyte sample of the No. 1 vanadium battery

[0037] In this example, the ICP-OES (Inductively Coupled Plasma Atomic Emission Spectrometer) used for elemental determination uses two types of spectrometers, iCAP6300 and IRIS / HR from Thermo Fisher Corporation of the United States.

[0038] Firstly, a sample solution for detection and analysis of the vanadium battery electrolyte is prepared. Dilute the electrolyte according to the relationship of 6.25 times, accurately measure 8.0mL vanadium battery electrolyte mother liquor into a 50mL volumetric flask with a pipette, dilute directly to the scale with water, and mix well.

[0039] Then, prepare the calibration curve standard solution. Take by weighing 16g high-purity vanadium pentoxide (V 2 o 5 ≥99.99%) in a 500mL Erlenmeyer flask or other container, first wash the container wall with 120mL (2+1) dilute hydrochloric acid and shake to disperse vanadi...

example 2

[0047] Except following difference, all the other adopt the No. 2 vanadium battery electrolyte sample of example 2 in the same method as example 1:

[0048] Dilute the electrolyte solution according to the 5-fold relationship, accurately measure 10.0mL vanadium battery electrolyte mother solution in a 50mL volumetric flask with a pipette, add water to directly dilute to the scale, and mix well.

[0049] Weigh 16g of high-purity vanadium pentoxide, rinse the container wall with 120mL (2+1) dilute hydrochloric acid and shake to disperse vanadium pentoxide, add (2+1) dilute sulfuric acid 53g, and digest at 160°C for 2 hours; Add 30mL of water, heat up to 250°C and react for 1 hour; add 40mL of water, heat up to 320°C and react until the sample is completely digested, heat up to 400°C and evaporate for 30min, add (2+1) dilute sulfuric acid 30g, cool to room temperature Then transfer it to a 500mL volumetric flask; add the standard solution of impurity elements to be tested.

[00...

example 3

[0053] Except following difference, all the other adopt the method identical with example 1 to measure the No. 3 vanadium battery electrolyte sample of example 3:

[0054] Dilute the electrolyte solution by 10 times, measure 5.0mL electrolyte solution in a 50mL volumetric flask, add water to dilute to volume, and mix well.

[0055] Weigh 16g of high-purity vanadium pentoxide, wash the container wall with 120mL (2+1) dilute hydrochloric acid and shake to disperse vanadium pentoxide, add (2+1) dilute sulfuric acid 53g, digest and react at 200°C for 2 hours, replenish Add 40mL of water, heat up to 280°C and react for 2 hours; then add 50mL of water, heat up to 350°C and react until the sample is completely digested, heat up to 450°C and evaporate for 30min; finally add (2+1) dilute sulfuric acid 30g, cool to room temperature Then transfer to a 500mL volumetric flask; add the standard solution of impurity elements to be tested.

[0056] Set the working parameters of the inductive...

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Abstract

The invention provides a method for detecting the content of impurity elements in electrolyte of a vanadium cell. The method comprises the following steps: measuring primary sample solution of electrolyte of the vanadium cell as per the proportional relation of dilution by 5 to 10 times, placing the primary sample solution in a measuring flask, adding water for dilution to fix volume, adding standard solution of elements to be detected with different volumes in prepared matrix matching base solution formed by vanadium ion, hydrogen ion and sulfate ion, finally preparing standard solution of elements to be detected with different concentration gradients, drawing a standard curve of standard solution of elements to be detected, inspecting linearly dependent coefficients, determining the primary sample solution, which is prepared through dilution, of electrolyte of the vanadium cell, , multiplying a detection result by the dilution ratio to obtain the content of impurity elements in electrolyte of the vanadium cell. The method has good precision and reproducibility of preparation of sample solution and instrument measurement.

Description

technical field [0001] The invention belongs to the field of element detection and analysis, in particular, the invention relates to a method for measuring the content of impurity elements in a vanadium battery electrolyte. Background technique [0002] The full name of the vanadium battery is vanadium redox flow battery (Vanadium Redox Battery, abbreviated as VRB), as a kind of redox battery whose active material is in a circulating liquid state, it is one of the green batteries with strong development momentum at present, and it is gradually Enter the commercialization stage. [0003] As a kind of chemical energy storage battery, vanadium battery has obvious advantages compared with traditional lead storage battery and lithium battery. It can be deeply discharged with high current density, and has the advantages of large power, large capacity, high efficiency, long life, instant charging, high safety, and low cost. The application fields of vanadium batteries are very br...

Claims

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Application Information

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IPC IPC(8): G01N21/71
Inventor 成勇其他发明人请求不公开姓名
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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