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Preparation method of high-efficiency vanadyl sulfate electrolyte

The technology of vanadyl sulfate and electrolyte is applied in the directions of acid electrolyte, aqueous electrolyte, circuit, etc., can solve the problems of low utilization rate of vanadium and the like, and achieve the effect of low cost and simple process

Inactive Publication Date: 2014-09-24
QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vanadium utilization rate of this method is low, and the purity of the electrolyte also depends on the purity of the raw material V2O5

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The preparation method of this efficient vanadyl sulfate electrolyte comprises the following steps,

[0013] Step (1): Extract sodium hydroxide with vanadium slag and stone coal to obtain a vanadyl sulfate solution with a pH of 3.0~4.0;

[0014] Step (2): adding lithium borohydride 3 to 5 times the amount required for divalent oxide reduction to the vanadyl sulfate solution extracted in step (1);

[0015] Step (3): According to the ratio of parts by weight, P507: TBP: sulfonated kerosene is mixed at 20~30: 10~20: 40~50 to make an extraction agent. Compared with O / A=4:1, the extraction time 30min, the vanadyl sulfate solution prepared in step (2) was subjected to multistage countercurrent extraction under the condition of a clarification time of 10min, and the number of stages was 3 to 6;

[0016] Step (4): The extract obtained in step (3) is separated into two phases, and the vanadium-loaded organic phase is washed with deionized water. Under the conditions of O / A=10:1...

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Abstract

The invention relates to a preparation method of high-efficiency vanadyl sulfate electrolyte. The preparation method comprises the steps of extracting a vanadyl sulfate solution, inorganically reducing the vanadyl sulfate solution, preparing a mixed extracting agent, performing reverse extraction on vanadyl sulfate, organically reducing a vanadyl sulfate reverse extracting solution, concentrating a vanadyl sulfate electrolyte precursor and the like, so that the high-efficiency vanadyl sulfate electrolyte is prepared. The preparation method of the high-efficiency vanadyl sulfate electrolyte is simple in technology and low in cost, and is widely applied to large-scale production of the vanadyl sulfate electrolyte for an all-vanadium battery.

Description

technical field [0001] The invention relates to a preparation method of high-efficiency vanadyl sulfate electrolyte. Background technique [0002] All-vanadium redox flow battery (VRB) is an excellent energy storage device. The capacity of the battery depends on the amount of electrolyte and the concentration of vanadium ions. The electrolyte can be placed separately from the battery. The battery has a long service life, high reliability, and can be quickly charged and discharged. It has great development prospects in photovoltaic power generation, wind power generation, peak shaving and valley filling. VRB batteries have no solid-state reaction, no change in the structure and form of electrode materials, and are cheap, safe and environmentally friendly, and low in operation and maintenance costs. A VRB battery consists of two electrolyte pools and layers of battery cells. The electrolyte cells are used to hold two different electrolytes, and each electrolyte cell is equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCY02E60/528H01M8/188H01M2300/0011Y02E60/50
Inventor 孙琦李岩孙慧英
Owner QINGDAO QIANYUN HIGH TECH NEW MATERIAL