Method for preparing vanadium trioxide by recycling anode electrolyte of invalid vanadium battery

A positive electrolyte, vanadium trioxide technology, applied in battery recycling, fuel cell disposal/recycling, vanadium oxide, etc., can solve the problems of waste water generation, complex recycling process, exhaust gas pollution, etc., to reduce production costs, adsorption High efficiency and resource saving effect

Pending Publication Date: 2021-03-26
ANSTEEL BEIJING RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Moreover, the recycling process is complicated, and was

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  • Method for preparing vanadium trioxide by recycling anode electrolyte of invalid vanadium battery

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Embodiment 1

[0042] Measure 1L of invalid vanadium battery positive electrode electrolyte, adopt potentiometric titration to measure the concentration of vanadium ions, wherein the concentration of pentavalent vanadium ions is 1.2mol / L, and the concentration of tetravalent vanadium ions is 0.4mol / L, add activated carbon 9.6g ( That is, 0.8 moles), the ratio of activated carbon to the total molar amount of tetravalent vanadium ions and pentavalent vanadium ions in the electrolyte is 0.5:1, shake at 10°C for 4 hours and then filter. The filtered activated carbon was dried at 60° C. for 90 minutes to obtain a dry vanadium-containing adsorbent. Put the dry vanadium-containing adsorbent in a muffle furnace, blow in nitrogen, heat to 500°C, and keep it warm for 1 hour; cool down to room temperature with the furnace, take it out of the furnace, grind it finely, and obtain the vanadium trioxide product. The phase composition in the product is identified as vanadium trioxide by X-ray diffraction me...

Embodiment 2

[0045] Measure 2.5L of the positive electrode electrolyte of the invalid vanadium battery, and use the potentiometric titration method to measure the concentration of vanadium ions. After testing, the concentration of pentavalent vanadium ions is 0.8mol / L, and the concentration of tetravalent vanadium ions is 0.7mol / L. Add 22.5g of carbon black (that is, 1.875 moles), the ratio of carbon black to the total molar mass of tetravalent vanadium ions and pentavalent vanadium ions in the electrolyte is 0.5:1, stir at 40°C for 2 hours and then filter. The filtered carbon black was dried at 90° C. for 60 minutes to obtain a dry vanadium-containing adsorbent. Put the dry vanadium-containing adsorbent in a muffle furnace, feed it with argon, heat it to 650°C, and keep it warm for 2 hours; cool it to room temperature with the furnace, take it out of the furnace, grind it finely, and get the vanadium trioxide product. Use ammonium ferrous sulfate-titration method (GB / T 20567-2006) to meas...

Embodiment 3

[0048] Measure 0.5L of the positive electrode electrolyte of the invalid vanadium battery, and use the potentiometric titration method to measure the concentration of vanadium ions. After testing, the concentration of pentavalent vanadium ions is 0.3mol / L, and the concentration of tetravalent vanadium ions is 1.4mol / L. Tube 5.1g (that is, 0.425 moles), the ratio of multi-walled carbon nanotubes to the total molar amount of tetravalent vanadium ions and pentavalent vanadium ions in the electrolyte is 0.5:1, stirred at 30°C for 3 hours and then filtered. The filtered multi-walled carbon nanotubes were dried at 100° C. for 30 min to obtain a dry precursor. Put the dried precursor in a muffle furnace, feed it with argon, heat it to 700°C, and keep it warm for 0.5h; cool it down to room temperature with the furnace, take it out of the furnace, grind it finely, and get the vanadium trioxide product. Use ammonium ferrous sulfate-titration method (GB / T 20567-2006) to measure the vanad...

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Abstract

The invention discloses a method for preparing vanadium trioxide by recycling anode electrolyte of an invalid vanadium battery. The method comprises the following steps: a, measuring tetravalent vanadium ion concentration and pentavalent vanadium ion concentration of the anode electrolyte of the invalid vanadium battery; b, adding a carbon-based adsorbent into the electrolyte in the step a, adsorbing, filtering and drying to obtain a vanadium-containing adsorbent; and c, roasting the vanadium-containing adsorbent obtained in the step b under the protection of an inert atmosphere to obtain a vanadium trioxide product. According to the method for preparing the vanadium trioxide by recycling the anode electrolyte of the invalid vanadium battery, the problem of disposal of the electrolyte of the existing invalid vanadium battery can be solved, a high-added-value vanadium trioxide product can be obtained, and the method is simple in process, free of pollution, environmentally friendly and good in application prospect.

Description

technical field [0001] The invention belongs to the field of electrolyte recovery of invalid vanadium batteries, and in particular relates to a method for preparing vanadium trioxide by recycling the positive electrode electrolyte of invalid vanadium batteries. Background technique [0002] Vanadium battery, the full name of vanadium redox flow battery, has the advantages of long service life, high power, large capacity, high efficiency, fast response, instant charging, high safety performance and low cost. Based on the many unique advantages above, the vanadium battery energy storage system can be used in a wide range of fields, especially as a large-scale energy storage system and power grid peak regulation. When the all-vanadium redox flow battery is charging, it converts electrical energy into vanadium ions that store chemical energy in different valence states. At this time, the positive electrode VO 2+ oxidized to VO 2 + , V in the negative pole 3+ revert to V 2+ ...

Claims

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Application Information

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IPC IPC(8): C01G31/02H01M8/008H01M8/18
CPCC01G31/02C01G31/003H01M8/188H01M8/008H01M2250/10C01P2002/72C01P2006/80Y02E60/50Y02W30/84
Inventor 杨晓高荣荣曾泽华刘天豪韩慧果
Owner ANSTEEL BEIJING RES INST
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