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Preparation method of composite electrode material with foamed coating layer

A composite electrode and cladding layer technology, which is applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problems of poor cycle performance, poor conductivity of nickel-cobalt-manganese ternary materials, and unstable structure, so as to improve crystallinity , Electrode material structure is stable, the effect of improving cycle performance

Active Publication Date: 2019-10-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] SUMMARY OF THE INVENTION In order to solve the problems of poor conductivity of nickel-cobalt-manganese ternary materials and poor cycle performance due to structural instability under high voltage, a LiNi with a foamy coating is provided. 0.6 co 0.2 mn 0.2 o 2 @Co 3 o 4 Preparation method of composite electrode material

Method used

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  • Preparation method of composite electrode material with foamed coating layer
  • Preparation method of composite electrode material with foamed coating layer
  • Preparation method of composite electrode material with foamed coating layer

Examples

Experimental program
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Embodiment 1

[0025] The target product of the present invention LiNi 0.6 co 0.2 mn 0.2 o 2 Prepared by the following steps:

[0026] (1) Co-precipitation method to synthesize stable Ni 0.6 co 0.2 mn 0.2 C 2 o 4 Precursor: Weigh 6.164g Ni(CH 3 COOH) 2 4H 2 O, 2.056gCo(CH 3 COOH) 2 4H 2 O, 2.002g Mn(CH 3 COOH) 2 4H 2 O was dissolved in the mixed solution of 60ml water and 60ml ethylene glycol, and weighed 6.240g C 2 h 2 o 4 2H 2 O and 0.2g of SDS were dissolved in another mixed solution of 60ml of water and 60ml of ethylene glycol, and the metal salt solution was slowly added dropwise to C under agitation. 2 h 2 o 4 2H 2 In the mixed solution of O and SDS, a light green precipitate is produced in the solution, and the stirring is continued for 6h;

[0027] (2) After stirring, put the solution into a hydrothermal kettle, place it in a muffle furnace, react at 200°C for 14h, wash by centrifugation, and dry overnight to obtain Ni 0.6 co 0.2 mn 0.2 C 2 o 4 Precursor;...

Embodiment 2

[0030] The target product of the present invention 1wt.%Co 3 o 4 coated LiNi 0.6 co 0.2 mn 0.2 o 2 Composite materials are produced by the following steps:

[0031] (1) Co-precipitation method to synthesize stable Ni 0.6 co 0.2 mn 0.2 C 2 o 4 Precursor: Weigh 6.164g Ni(CH 3 COOH) 2 4H 2 O, 2.056gCo(CH 3 COOH) 2 4H 2 O, 2.002g Mn(CH 3 COOH) 2 4H 2 O was dissolved in the mixed solution of 60ml water and 60ml ethylene glycol, and weighed 6.240g C 2 h 2 o 4 2H 2 O and 0.2g of SDS were dissolved in another mixed solution of 60ml of water and 60ml of ethylene glycol, and the metal salt solution was slowly added dropwise to C under agitation. 2 h 2 o 4 2H 2 In the mixed solution of O and SDS, a light green precipitate is produced in the solution, and the stirring is continued for 6h;

[0032] (2) After stirring, put the solution into a hydrothermal kettle, place it in a muffle furnace, react at 200°C for 14h, wash by centrifugation, and dry overnight to obta...

Embodiment 3

[0036] The target product of the present invention 3wt.% Co 3 o 4 coated LiNi 0.6 co 0.2 mn 0.2 o 2 Composite materials are produced by the following steps:

[0037] (1) Co-precipitation method to synthesize stable Ni 0.6 co 0.2 mn 0.2 C 2 o 4 Precursor: Weigh 6.164g Ni(CH 3 COOH) 2 4H 2 O, 2.056gCo(CH 3 COOH) 2 4H 2 O, 2.002g Mn(CH 3 COOH) 2 4H 2 O was dissolved in the mixed solution of 60ml water and 60ml ethylene glycol, and weighed 6.240g C 2 h 2 o 4 2H 2 O and 0.2g of SDS were dissolved in another mixed solution of 60ml of water and 60ml of ethylene glycol, and the metal salt solution was slowly added dropwise to C under agitation. 2 h 2 o 4 2H 2 In the mixed solution of O and SDS, a light green precipitate is produced in the solution, and the stirring is continued for 6h;

[0038] (2) After stirring, put the solution into a hydrothermal kettle, place it in a muffle furnace, react at 200°C for 14h, wash by centrifugation, and dry overnight to obt...

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Abstract

The invention discloses a preparation method of a LiNi0.6Co0.2Mn0.2O2@Co3O4 composite electrode material with a foam-shaped coating layer. The preparation method comprises the following steps: takingNi(CH3COOH)2*4H2O, Co(CH3COOH)2*4H2O and Mn(CH3COOH)2*4H2O as raw materials; taking C2H2O4*2H2O as a complexing agent and a precipitating agent, taking a mixed solution of water and ethylene glycol asa solvent, and synthesizing a Ni0.6Co0.2Mn0.2C2O4 precursor by adopting a solvothermal method; taking LiOH.H2O as a lithium source, performing the mixing and grinding of LiOH.H2O and a Ni0.6Co0.2Mn0.2C2O4 precursor, then sintering the mixture in a tubular furnace to obtain LiNi0.6Co0.2Mn0.2O2; and obtaining the LiNi0.6Co0.2Mn0.2O2@Co3O4 composite electrode material by a wet coating method throughprecipitation and calcination processes. The method is simple in process, wide in raw material source and beneficial to large-scale industrial production; the prepared lithium ion battery positive electrode material has good rate charge-discharge performance and excellent cycle service life, and the capacity of the material is higher.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials, in particular to a LiNi material with a foamed coating 0.6 co 0.2 mn 0.2 o 2 @Co 3 o 4 Preparation method of composite electrode material. Background technique [0002] Today, the massive consumption of fossil fuels has led to the continuous release of greenhouse gases (such as carbon dioxide and methane) into the atmosphere, causing serious damage to the environment. Therefore, the development of sustainable energy is imperative. As the most promising electrical energy storage medium, lithium-ion batteries have received extensive attention in the fields of portable electronic devices and electric vehicles. So far, many researchers have devoted themselves to developing and studying transition metal oxides as cathode materials for lithium-ion batteries. Among many cathode materials, the nickel-rich ternary material LiNi 0.6 co 0.2 mn 0.2 o 2 become strong can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/505H01M4/525H01M10/0525H01M4/02
CPCH01M4/366H01M4/48H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 卑凤利侯晶晶温乐赵淑宁
Owner NANJING UNIV OF SCI & TECH
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