A kind of preparation method of ammonium vanadate/foam nickel sodium ion battery self-supporting positive electrode

A sodium-ion battery, nickel foam technology, applied in battery electrodes, secondary batteries, nanotechnology for materials and surface science, etc., can solve the problems of difficult control of the reaction process, high reaction temperature, and long reaction time. Conducive to the effect of high density filling, high porosity and high capacity

Active Publication Date: 2019-07-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the precipitation method synthesizes NH 4 V 3 o 8 There are disadvantages such as the reaction process is not easy to control, side reactions occur, and the product purity is low. The hydrothermal method synthesizes NH 4 V 3 o 8 There are disadvantages such as relatively high reaction temperature and long reaction time
And ammonium vanadate has poor conductivity due to its low conductivity.

Method used

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  • A kind of preparation method of ammonium vanadate/foam nickel sodium ion battery self-supporting positive electrode
  • A kind of preparation method of ammonium vanadate/foam nickel sodium ion battery self-supporting positive electrode
  • A kind of preparation method of ammonium vanadate/foam nickel sodium ion battery self-supporting positive electrode

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preparation example Construction

[0031] A kind of preparation method of ammonium vanadate / foam nickel sodium ion battery self-supporting positive electrode, comprises the following steps:

[0032] 1) The electrode material substrate sheet-shaped nickel foam with a thickness of 1 mm is cut into a rectangular nickel foam sheet A so that its length is 3 cm and its width is 2 cm;

[0033] 2) Submerge 0.25-0.50g (i.e. 1-2 tablets) of A in 40-70mL of analytically pure acetone and ultrasonically clean it at a frequency of 40KHz for 0.5-1h, then take out A, and rinse with deionized water to obtain B;

[0034] 3) Submerge 0.25-0.50g (that is, 1-2 tablets) of B in 40-70mL of hydrogen peroxide solution with a mass concentration of 30%, and treat it in an ultrasonic environment with a frequency of 40K Hz for 0.5-1h, then take out B and use it without Rinse with water and ethanol, then put into an oven, and dry at a temperature of 60-90°C for 1-3 hours to obtain C;

[0035] 4) Dissolve ammonium metavanadate in deionized ...

Embodiment 1

[0041] (1) the nickel foam sheet A that the thickness is 1mm is cut into rectangular nickel foam sheet A of the electrode material matrix sheet foam nickel, makes it long to be 3cm, and is wide to be 2cm;

[0042] (2) Submerge 0.25g of A in 40ml of analytically pure acetone and ultrasonically clean it at a frequency of 40KHz for 0.5h, then take out A, and then rinse with deionized water to obtain B;

[0043](3) Submerge 0.25g B in 40ml, 30% mass concentration of hydrogen peroxide solution and treat it in an ultrasonic environment with a frequency of 40K Hz for 0.5h, then take out B and rinse it with absolute ethanol, then put it into an oven, and heat it at 60 C was obtained by drying at a temperature of ℃ for 1 h;

[0044] (4) Dissolve ammonium metavanadate in deionized water, heat to 30°C, and use a magnetic stirrer to stir at a speed of 500 rpm for 0.5h to prepare NH with a molar concentration of 0.05mol / L 4 VO 3 Solution D;

[0045] (5) Use 2mol / L nitric acid to adjust ...

Embodiment 2

[0050] (1) the nickel foam sheet A that the thickness is 1mm is cut into rectangular nickel foam sheet A of the electrode material substrate sheet foam nickel, makes it long to be 3cm, and is wide to be 2cm;

[0051] (2) Submerge 0.50 g of A in 70 ml of analytically pure acetone and ultrasonically clean it at a frequency of 40 KHz for 1 hour, then take out A, and then rinse with deionized water to obtain B;

[0052] (3) Submerge 0.50g B in 70ml, 30% mass concentration of hydrogen peroxide solution and treat it in an ultrasonic environment with a frequency of 40K Hz for 1h, then take out B and rinse it with absolute ethanol, then put it into an oven, and heat it at 90°C Dry at a temperature of 3h to obtain C;

[0053] (4) Dissolve ammonium metavanadate in deionized water, heat to 60°C, and use a magnetic stirrer to stir at a speed of 800 rpm for 1 h to prepare NH with a molar concentration of 0.20 mol / L 4 VO 3 Solution D;

[0054] (5) Use 2mol / L nitric acid to adjust the pH ...

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Abstract

The invention discloses a method of preparation of self-supporting anode for ammonium vanadate / nickel foam sodium-ion batteries. The method comprises the steps that nickel foams are cleaned with acetone and after the treatment with hydrogen peroxide, the nickel foams are washed and dried, and an electrode material matrix is obtained; then a certain concentration of ammonium metavanadate solution is configured, the PH value of the solution is regulated, and a required solution is obtained; the obtained solution and the nickel slices are then put into a hydrothermal kettle, heating and thermal insulation are conducted for a certain time by a thermal induction device, and an ammonium vanadate / nickel foam sodium-ion anode composite material with a three-dimensional porous connection structure is obtained. By the method of preparation of self-supporting anode for ammonium vanadate / nickel foam sodium-ion batteries, the self-supporting material of sodium ion batteries with the three-dimensional porous connection nano-structure, larger specific surface area and small internal resistance is prepared.

Description

technical field [0001] The invention belongs to the field of preparation of positive electrode materials for sodium ion batteries, and in particular relates to a method for preparing self-supporting positive electrodes for ammonium vanadate / foam nickel sodium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in the portable electronics market due to their high energy density, long cycle life, and no memory effect. However, as industries such as vehicles and large-scale power systems rely more heavily on lithium-ion batteries, global lithium resources will not be able to effectively meet the huge demand for power lithium-ion batteries, which will further push up the prices of lithium-related materials and increase the battery capacity. cost, which ultimately hinders the development of the new energy industry. Therefore, it is critical to develop other related energy storage technologies that are inexpensive alternatives to lithium-ion batteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1397B82Y30/00H01M10/054
CPCB82Y30/00H01M4/1397H01M10/054H01M2004/021Y02E60/10
Inventor 黄剑锋李瑞梓李春光李嘉胤何元元党欢焦冰玉陈文卓
Owner SHAANXI UNIV OF SCI & TECH
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