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Method for producing nav6o15 sodium-ion battery electrode material by using spent vanadium battery electrolyte

A sodium-ion battery and electrode material technology, applied in battery electrodes, fuel cell disposal/recycling, battery recycling, etc., can solve the problems of high energy consumption, difficult industrial production, long preparation process, etc., and achieve simple and uniform process methods The effect of good sex and high purity

Active Publication Date: 2021-04-06
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is relatively long, and heat treatment is required after the hydrothermal reaction, which consumes a lot of energy and is not easy for industrial production, and V 2 o 5 / Nav 6 o 15 The non-uniform ratio of the electrode material may cause problems with the consistency of the electrode material

Method used

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  • Method for producing nav6o15 sodium-ion battery electrode material by using spent vanadium battery electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare 10L of pentavalent electrolyte solution through charged pre-oxidation for later use (1# electrolyte solution), wherein [VO 2 + ] is 1.5mol / L~1.7mol / L, VO 2+ <0.1g / L, the electrolyte should be stored at 0-25°C;

[0033] Measure 500mL of 1# electrolyte with a total vanadium concentration of 1.6mol / L, adjust the pH of the electrolyte to be less than or equal to 0 with 150g / L of sodium hydroxide, and measure the hydrogen ion concentration of the solution to be 1.2mol / L, then add twelve Sodium alkylbenzene sulfonate 20.4g, the solution is transferred to a hydrothermal reaction kettle, sealed and placed in an oven, kept at a temperature of 100°C for 8h, after the reaction, centrifugally washed twice with deionized water and absolute ethanol The centrifugation speed was 5000r / min, the centrifugation time was 10min, and dried at 50°C for 8h to obtain NaV 6 o 15 The powder is 50.23g, the particle size is 120-180nm, and the vanadium yield is 66.21%.

Embodiment 2

[0035] Prepare 10L of pentavalent electrolyte solution through charged pre-oxidation for later use (1# electrolyte solution), wherein [VO 2 + ] is 1.5mol / L~1.7mol / L, VO 2+ <0.1g / L, the electrolyte should be stored at 0-25°C;

[0036] Measure 500mL of 1# electrolyte solution with a total vanadium concentration of 1.5mol / L, adjust the pH of the electrolyte solution to less than or equal to 0 with 180g / L sodium hydroxide, measure the hydrogen ion concentration of the solution to be 1.0mol / L, add hexadecane 7.5g of trimethylammonium bromide, the solution was transferred to a hydrothermal reaction kettle, sealed and placed in an oven, and kept at a temperature of 110°C for 16h. After the reaction, the solution was centrifugally washed with deionized water and absolute ethanol. Twice, the centrifugation speed is 5000r / min, the centrifugation time is 10min, and dried at 60°C for 12h to obtain NaV 6 o 15 The powder is 44.23g, the particle size is 120-180nm, and the vanadium yield ...

Embodiment 3

[0038] Prepare 10L of pentavalent electrolyte solution through charged pre-oxidation for later use (1# electrolyte solution), wherein [VO 2 + ] is 1.5mol / L~1.7mol / L, VO 2+ <0.1g / L, the electrolyte should be stored at 0-25°C;

[0039] Measure 500mL of 1# electrolyte with a total vanadium concentration of 1.7mol / L, adjust the pH of the electrolyte to be less than or equal to 0 with 200g / L sodium hydroxide, and measure the hydrogen ion concentration of the solution to be 1.4mol / L, add 10ml of polyethylene Diol 2000, transfer the solution into a hydrothermal reaction kettle, place it in an oven after airtight, and keep it warm at a temperature of 110°C for 16 hours. After the reaction, wash twice with deionized water and absolute ethanol by centrifugation at 5000r / min, centrifuged for 10min, and dried at 60°C for 12h to obtain NaV 6 o 15 The powder is 55.35g, the particle size is 150-200nm, and the vanadium yield is 68.66%.

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Abstract

The invention discloses a method for preparing NaV by utilizing the failed vanadium battery electrolyte 6 O 15 The method for the electrode material of sodium ion battery belongs to the technical field of sodium ion battery, and comprises the following steps: (1) taking the vanadium battery electrolyte that has failed, and feeding it into the positive electrode of the vanadium battery for charging and preoxidation to obtain an electrolyte of pentavalent vanadium ions; (1) 2) adjusting the pH of the pentavalent electrolyte ≤ 0; (3) adding a surfactant to the electrolyte obtained in step (2), and after the reaction is complete at 100-120° C., cooling, washing and drying to obtain NaV 6 O 15 . In the invention, the failed vanadium battery electrolyte is used as the raw material to realize resource recovery and reuse; and in the preparation of NaV 6 O 15 No additional preparation precursor is required in the process, the process method is simple, the cost is low, and it is easy to popularize and apply; at the same time, the NaV prepared by the present invention 6 O 15 With high purity, good uniformity and small particle size, it can be used as a positive electrode material for sodium ion batteries with excellent performance.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, and in particular relates to a method for preparing NaV by utilizing the electrolyte solution of invalid vanadium batteries. 6 o 15 A method for electrode materials for sodium-ion batteries. Background technique [0002] Lithium ion is widely used in all walks of life because of its high specific energy per unit volume, small self-discharge, and excellent cycle performance, especially as a portable power supply for electronic products and power batteries for electric vehicles. However, with the large-scale development of lithium-ion batteries Lithium resources that can be used for development are depleting day by day. It is foreseeable that human beings will no longer be able to continue to use lithium-ion batteries due to the depletion of lithium mine resources in the near future. Therefore, it is urgent to find an alternative battery. Lithium and sodium belong to the same group i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M10/054H01M8/008
CPCH01M4/485H01M8/008H01M10/054Y02E60/10Y02W30/84
Inventor 刘波韩慧果陈勇
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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