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Conductive carrier self-supporting flower-shaped Co3V2O8 lithium ion battery negative electrode material and preparation

A technology of lithium ion battery and conductive carrier is applied in the field of preparation and application of energy materials to achieve the effects of easy process amplification, simplified process and simple method

Active Publication Date: 2019-08-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the existing negative electrode materials of lithium-ion batteries, the present invention provides a self-supporting flower-like Co 3 V 2 o 8 Lithium-ion battery negative electrode composite material and preparation method

Method used

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  • Conductive carrier self-supporting flower-shaped Co3V2O8 lithium ion battery negative electrode material and preparation
  • Conductive carrier self-supporting flower-shaped Co3V2O8 lithium ion battery negative electrode material and preparation
  • Conductive carrier self-supporting flower-shaped Co3V2O8 lithium ion battery negative electrode material and preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Self-supporting flower-like Co 3 V 2 o 8 The preparation method of lithium ion battery negative electrode material, comprises the following steps:

[0033] Step 1: Cut the nickel foam to 2*5cm;

[0034] Step 2: Soak 2*5cm nickel foam in hydrochloric acid solution to remove the oxide layer on the surface, then ultrasonically wash it with ethanol and deionized water several times respectively, and soak the foamed nickel in deionized water for use;

[0035] Step 3: Weigh 0.5093g of cobalt nitrate hexahydrate and 0.6g of urea and dissolve them in 35ml of deionized water, stir for 0.5 hours, and prepare a cobalt nitrate solution with a concentration of 0.05mol / L

[0036] Step 4: Transfer the above mixed solution into a hydrothermal kettle, put 2*5cm nickel foam vertically into the hydrothermal kettle, and keep it at 120°C for 6 hours to obtain cobalt hydroxide self-supported by nickel foam;

[0037] Step 5: Weigh 0.614g ammonium metavanadate and add it to 35ml deionized ...

Embodiment 2

[0045] Self-supporting flower-like Co 3 V 2 o 8 The preparation method of lithium ion battery negative electrode material, comprises the following steps:

[0046] Step 1: Cut the carbon cloth to 2*3cm;

[0047] Step 2: Soak 2*3cm carbon cloth with nitric acid solution to remove impurities on the surface, then ultrasonically wash several times with acetone, ethanol and deionized water respectively, and soak the obtained carbon cloth in deionized water for use;

[0048] Step 3: Weigh 0.4758g cobalt chloride hexahydrate and 0.4g urea and dissolve them in 20ml deionized water, stir for 0.5 hours, and prepare a cobalt chloride solution with a concentration of 0.1mol / L

[0049] Step 4: Transfer the above mixed solution into a hydrothermal kettle, put 2*3cm carbon cloth vertically into the hydrothermal kettle, and keep it at 100°C for 10 hours to obtain cobalt hydroxide self-supported by carbon cloth;

[0050] Step 5: Weigh 0.864g of sodium metavanadate and add it to 20ml of deio...

Embodiment 3

[0053] Self-supporting flower-like Co 3 V 2 o 8 The preparation method of lithium ion battery negative electrode material, comprises the following steps:

[0054] Step 1: Cut the titanium sheet to 2*4cm;

[0055] Step 2: Soak 2*4cm titanium sheet in hydrochloric acid solution to remove the oxide layer on the surface, then ultrasonically wash several times with ethanol and deionized water respectively, and soak the obtained titanium sheet in deionized water for use;

[0056] Step 3: Weigh 4.2173g of cobalt sulfate heptahydrate and 3g of urea and dissolve them in 30ml of deionized water, stir for 0.5 hours, and prepare a cobalt sulfate solution with a concentration of 0.5mol / L

[0057] Step 4: Transfer the above mixed solution into a hydrothermal kettle, put 2*4cm titanium sheet vertically in the hydrothermal kettle, and keep it at 150°C for 4 hours to obtain cobalt hydroxide self-supported by the titanium sheet;

[0058] Step 5: Weigh 0.351g of potassium metavanadate and ad...

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Abstract

The invention discloses a conductive carrier self-supporting flower-shaped Co3V2O8 lithium ion battery negative electrode material and preparation, and belongs to the field of preparation and application of energy materials. In the composite material, flower-shaped Co3V2O8 uniformly grows on a conductive carrier. The flower-shaped Co3V2O8 is formed by laminating at least one sheet-shaped Co3V2O8.The preparation method of the composite material comprises the following steps: step 1, taking cobalt salt and urea as raw materials, and growing at least one layer of cobalt hydroxide as a precursoron a conductive carrier in situ by using a hydrothermal method; step 2, soaking the precursor template of the conductive carrier self-supporting cobalt hydroxide into the metavanadate solution for secondary hydrothermal treatment to obtain a conductive carrier self-supporting cobalt vanadium oxide composite material; and step 3, annealing the conductive carrier of the self-supporting cobalt-vanadium oxide in air to obtain the conductive carrier self-supporting flower-shaped Co3V2O8 composite material. The method is simple and feasible, the process can be enlarged, and the method can be appliedto the field of commercial lithium ion negative electrode materials.

Description

technical field [0001] The invention belongs to the field of preparation and application of energy materials, in particular to a preparation method of a novel lithium battery negative electrode material, in particular to self-supporting flower-shaped Co 3 V 2 o 8 Preparation method of electrode material. Background technique [0002] With the increase of electronic equipment and the increasing development of the electric vehicle industry, lithium-ion batteries have become the main battery due to their advantages such as large specific energy, stable discharge voltage, good cycle life, wide operating temperature range, low self-discharge rate and no memory effect. energy storage device. Lithium-ion batteries are mainly composed of positive and negative electrodes, electrolyte and separator. Traditional positive and negative electrodes are mainly composed of current collectors, active materials, binders and conductive agents. However, due to the addition of binders in trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/48H01M10/0525
CPCH01M4/48H01M4/525H01M10/0525Y02E60/10
Inventor 程道建黄兴凯刘晴于海燕吴登峰
Owner BEIJING UNIV OF CHEM TECH
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