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Method for optimizing lithium storage performance of alpha-Ni(OH)2 material

A performance and lithium storage technology, applied in the field of optimizing the lithium storage performance of α-Ni2 materials, can solve problems such as poor cycle stability

Active Publication Date: 2020-06-12
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently the Ni(OH) 2 The technical research on the anode material of lithium-ion batteries has not attracted enough attention, and the poor cycle stability has become a constraint for Ni(OH) 2 As a key factor for the practical application of lithium-ion battery anode materials

Method used

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  • Method for optimizing lithium storage performance of alpha-Ni(OH)2 material
  • Method for optimizing lithium storage performance of alpha-Ni(OH)2 material
  • Method for optimizing lithium storage performance of alpha-Ni(OH)2 material

Examples

Experimental program
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Effect test

Embodiment 1

[0015] (1) Weigh nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 0.02mol, dissolved in water to form 0.5mol / L Ni(NO 3 ) 2 solution; take urea by weighing the ratio of 30:1 by the molar ratio of urea and nickel nitrate hexahydrate and be made into urea solution of 6mol / L; Mix nickel nitrate solution and urea solution and disperse ultrasonically for 10 minutes to obtain uniform mixture.

[0016] (2) The mixed solution obtained in step (1) was placed in a constant temperature water bath, and stirred at 90° C. (stirring speed was 350 rpm) for 5 hours of reaction. After the reaction, the suspension obtained by the reaction was transferred to a dry box, aged at 60° C. for 12 hours, and then repeatedly suction-filtered and washed until the filtrate was neutral. Disperse the filter cake with water and freeze it in the refrigerator for 24 hours, then take it out and freeze-dry it to a constant weight, that is, the interlayer contains NO 3 - α-Ni(OH) 2 material, that achieves α...

Embodiment 2

[0018] (1) Weigh nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 0.02mol, dissolved in water to form 0.5mol / L Ni(NO 3 ) 2 solution; take urea by weighing the ratio of 30:1 by the molar ratio of urea and nickel nitrate hexahydrate and be made into urea solution of 6mol / L; Mix nickel nitrate solution and urea solution and disperse ultrasonically for 10 minutes to obtain uniform mixture.

[0019] (2) The mixed solution obtained in step (1) was placed in a constant temperature water bath, and stirred at 90° C. (stirring speed was 350 rpm) for 5 hours of reaction. After the reaction, the suspension obtained by the reaction was transferred to a dry box, aged at 60° C. for 12 hours, and then repeatedly suction-filtered and washed until the filtrate was neutral. Disperse the filter cake with water and put it in the refrigerator for 24 hours to freeze, then take it out and freeze-dry it to constant weight to obtain the NO content in the interlayer. 3 - α-Ni(OH) 2 Material.

...

Embodiment 3

[0022] (1) Weigh nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 0.02mol, dissolved in water to form 0.5mol / L Ni(NO 3 ) 2 solution; take urea by weighing the ratio of 30:1 by the molar ratio of urea and nickel nitrate hexahydrate and be made into urea solution of 6mol / L; Mix nickel nitrate solution and urea solution and disperse ultrasonically for 10 minutes to obtain uniform mixture.

[0023] (2) The mixed solution obtained in step (1) was placed in a constant temperature water bath, and stirred at 90° C. (stirring speed was 350 rpm) for 5 hours of reaction. After the reaction, the suspension obtained by the reaction was transferred to a dry box, aged at 60° C. for 12 hours, and then repeatedly suction-filtered and washed until the filtrate was neutral. Disperse the filter cake with water and put it in the refrigerator for 24 hours to freeze, then take it out and freeze-dry it to constant weight to obtain the NO content in the interlayer. 3 - α-Ni(OH) 2 Material.

...

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Abstract

The invention discloses a method for optimizing the lithium storage performance of an alpha-Ni(OH)2 material. Nickel nitrate hexahydrate is used as a nickel source, urea is used as a precipitant, anda homogeneous precipitation method is adopted to prepare an alpha-Ni(OH)2 material containing NO3 <-> between layers. The alpha-Ni(OH)2 material containing NO3 <-> between layers is respectively addedinto various sodium compound solutions for anion exchange, thereby finally obtaining the alpha-Ni(OH)2 material containing different anions between layers, that is, achieving the optimization of thelithium storage performance of the alpha-Ni(OH)2 material. The method disclosed by the invention has the advantages and meanings that the types of intercalated anions of the alpha-Ni(OH)2 material areregulated and controlled through a very simple method, so that the lithium storage performance of alpha-Ni(OH)2 is optimized; on one hand, the influence rule of different intercalation anions on thelithium storage performance of alpha-Ni(OH)2 is found out, and on the other hand, the method provides a new thought for performance optimization and improvement of the alpha-Ni(OH)2 material as the lithium ion battery negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials for lithium ion batteries, and in particular relates to an optimized α-Ni(OH) 2 Methods for Lithium Storage Properties of Materials. Background technique [0002] In the study of new anode materials for lithium-ion batteries, transition metal oxides have attracted much attention, but there are relatively few studies on transition metal hydroxides as anode materials for lithium-ion batteries. It was found that nickel hydroxide (Ni(OH) 2 ) has a higher theoretical discharge specific capacity than nickel oxide (NiO), and the preparation process does not require high-temperature sintering, so the cost is lower and the microscopic morphology and crystal structure are more abundant, especially nano-Ni(OH) 2 In the process of lithium storage, there is a significant pseudocapacitive effect, which is very beneficial to improve the rapid charge and discharge ability of the material. ...

Claims

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Application Information

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IPC IPC(8): C01G53/04H01M4/52H01M10/0525
CPCC01G53/04H01M4/523H01M10/0525H01M2004/021H01M2004/027C01P2002/72C01P2006/40Y02E60/10
Inventor 姚金环李延伟黄任枢
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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