Preparation method of lithium ion battery negative electrode material spinel porous high-entropy oxide material

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, chemical instruments and methods, negative electrodes, etc., to achieve the effects of high dispersion, fine particle size, and fast combustion synthesis speed

Active Publication Date: 2018-12-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the technical problem to be solved by the present invention is to design a novel lithium-ion battery negative electrode material spinel type (CoCrCuFeNi) 3 o 4 High-entropy oxide materials, while overcoming the shortcomings of existing technologies such a

Method used

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  • Preparation method of lithium ion battery negative electrode material spinel porous high-entropy oxide material
  • Preparation method of lithium ion battery negative electrode material spinel porous high-entropy oxide material
  • Preparation method of lithium ion battery negative electrode material spinel porous high-entropy oxide material

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Embodiment 1

[0023] Weigh 29.01g of Co(NO 3 ) 2 ·6H 2 O, 40.02g of Cr(NO 3 ) 3 9H 2 O, 24.16g of Cu(NO 3 ) 2 ·3H 2 O, 40.4g of Fe(NO 3 ) 3 9H 2 O and 29.08g of Ni(NO 3 ) 2 ·6H 2O was dissolved in 50mL of distilled water and 50mL of ethanol solution, and stirred evenly to obtain a mixed solution containing metal salts; then 38.42g of citric acid and 54.05g of glucose were weighed and added to the above mixed solution, and after stirring evenly, the pH of the mixed solution was adjusted with ammonia water. 8. Obtain a transparent sol; then heat the above transparent sol in an oil bath at 160°C to remove the solvent water to obtain a loose, foamy gel; finally place the above gel in a muffle furnace at 250°C for 30 minutes , to get the final product. XRD spectrum ( figure 1 ) shows that the prepared (CoCrCuFeNi) 3 o 4 The high-entropy oxide material is a spinel structure, and the SEM picture ( figure 2 ) shows that the prepared (CoCrCuFeNi) 3 o 4 The average particle size ...

Embodiment 2

[0025] Weigh 29.01g of Co(NO 3 ) 2 ·6H 2 O, 40.02g of Cr(NO 3 ) 3 9H 2 O, 24.16g of Cu(NO 3 ) 2 ·3H 2 O, 40.4g of Fe(NO 3 ) 3 9H 2 O and 29.08g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 50mL of distilled water, and stirred evenly to obtain a mixed solution containing metal salts; then 180.16g of glucose, 1.8g of ammonium nitrate and 1.8g of ammonium acetate were weighed and added to the above mixed solution, and after stirring evenly, the pH of the mixed solution was adjusted with ammonia water to 7. Obtain a transparent sol; then heat the above transparent sol in a water bath at 90°C to remove the solvent water to obtain a loose, foamy gel; finally place the above gel in a muffle furnace at 500°C for 15 minutes, to get the final product. SEM image ( image 3 ) shows that the prepared (CoCrCuFeNi) 3 o 4 The average particle size of the high-entropy oxide material is 80nm, the morphology is spherical and has a porous structure.

Embodiment 3

[0027] Weigh 43.66g of Co(NO 3 ) 2 ·6H 2 O, 60.02g of Cr(NO 3 ) 3 9H 2 O, 36.24g of Cu(NO 3 ) 2 ·3H 2 O, 60.6g of Fe(NO 3 ) 3 9H 2 O and 43.62g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 80mL of distilled water and 20mL of ethanol solution, and stirred evenly to obtain a mixed solution containing metal salts; then 168.9g of tartaric acid and 3.38g of ammonium nitrate were added to the above mixed solution, stirred evenly, and the pH of the mixed solution was adjusted to 7 with ammonia water , to obtain a transparent sol; then heat the above transparent sol in an oil bath at 120°C to remove solvent water and obtain a loose, foamy gel; finally place the above gel in a microwave oven with an input power of 600W for 8 minutes , to get the final product. SEM image ( Figure 4 ) shows that the prepared (CoCrCuFeNi) 3 o 4 The average particle size of the high-entropy oxide material is 60nm, the morphology is spherical and has a porous structure.

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Abstract

The invention discloses a preparation method of a lithium ion battery negative electrode material spinel porous high-entropy oxide material, and belongs to the field of inorganic oxide powder materials. The method is a low-temperature combustion synthesis method, and specifically includes the steps that metal nitrate is adopted as a metal source, one or a mixture of several of tartaric acid, citric acid, glucose, hexamine and ethylenediaminetetraacetic acid is used as a fuel, and by controlling the concentration of the metal salt raw material, the kind and the amount of the fuel, the kind andthe amount of a combustion improver and an ignition mode, characteristics of the grain size, the shape and the like of spinel ransition metal high-entropy oxide nano-powder are adjusted and controlled. According to the preparation method of the lithium ion battery negative electrode material spinel porous high-entropy oxide material, liquid-phase ingredients are adopted, molecular-level even mixing of the raw materials is ensured, and a stoichiometric ratio of the product is achieved; meanwhile the preparation method of the lithium ion battery negative electrode material spinel porous high-entropy oxide material has the advantages of being energy-saving, high in production efficiency, environmentally friendly, free from complex post-treatment and the like, and the prepared high-entropy oxide powder is high in purity, small in grain size and even in distribution, and has high initial discharge capacity and good cycle performance.

Description

technical field [0001] The invention belongs to the field of inorganic oxide powder materials, in particular to a lithium-ion battery negative electrode material, specifically a spinel-type porous (CoCrCuFeNi) 3 o 4 High-entropy oxide micro / nanomaterials and methods for their preparation. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, good cycle performance, low self-discharge rate, no memory effect, and environmental protection. Very bright application prospects. As one of the four major components of lithium batteries, negative electrode materials play an important role in improving the capacity and cycle performance of batteries, and are at the core of the middle reaches of the lithium battery industry. Among lithium-ion anode materials, graphite-based carbon anode materials have always occupied a dominant position because of their wide range of sources and low price. But on the one hand, the theoretical specific c...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/48H01M4/52H01M10/0525B82Y40/00
CPCB82Y40/00C01G53/006C01P2002/72C01P2004/03C01P2004/32C01P2004/64H01M4/48H01M4/52H01M10/0525H01M2004/021H01M2004/027Y02E60/10Y02P20/10
Inventor 冒爱琴项厚政王彪李宗耀贾洋刚俞海云檀杰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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