Method for preparing nano ternary composite lithium ion anode material by utilizing microemulsion

A positive electrode material and ternary composite technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as difficult to control precipitation morphology and size, and achieve good cycle stability, The effect of high discharge specific capacity

Active Publication Date: 2014-05-21
XINXIANG JINRUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of co-precipitation to prepare precursors, conditions such as solution concentration, pH, temperature, and stirring speed all have a great impact on the final product, so it is difficult to control the shape and size of the precipitate

Method used

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  • Method for preparing nano ternary composite lithium ion anode material by utilizing microemulsion
  • Method for preparing nano ternary composite lithium ion anode material by utilizing microemulsion
  • Method for preparing nano ternary composite lithium ion anode material by utilizing microemulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Nano LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Taking material synthesis as an example, the synthesis method includes the following steps:

[0026] 1. Evenly mix the surfactant Triton X-100 and the co-surfactant n-butanol and cyclohexane to make an emulsifier, and divide the emulsifier into the first equal part emulsifier and the second equal part emulsification agent;

[0027] 2. Dissolve nickel salt, cobalt salt and manganese salt in deionized water, stir evenly, and prepare an aqueous solution with a concentration of 0.5mol / L;

[0028] 3. Mix the aqueous solution with a concentration of 0.5mol / L in step 2 with the first aliquot emulsifier in step 1, stir evenly, and stir at room temperature for 20min to make a nickel-cobalt-manganese salt microemulsion;

[0029] Four, preparation concentration is the alkaline solution of 2mol / L, and adding concentration is the complexing agent of 0.25mol / L in alkaline solution, makes complexing agent alkaline solution;

[0030] Five, the comp...

Embodiment 2

[0038] Nano LiNi 0.4 co 0.2 mn 0.4 o 2 Taking material synthesis as an example, the synthesis method includes the following steps:

[0039] 1. Evenly mix the surfactant Triton X-100 and the co-surfactant n-butanol and cyclohexane to make an emulsifier, and divide the emulsifier into the first equal part emulsifier and the second equal part emulsification agent;

[0040] 2. Dissolve nickel salt, cobalt salt and manganese salt in deionized water, stir evenly, and prepare an aqueous solution with a concentration of 2.5mol / L;

[0041] 3. The aqueous solution with a concentration of 2.5mol / L in step 2 is mixed with the first aliquot emulsifier in step 1, stirred evenly, and stirred at room temperature for 60min to make a nickel-cobalt-manganese salt microemulsion;

[0042] Four, preparation concentration is the alkaline solution of 10mol / L, and adding concentration is the complexing agent of 3mol / L in alkaline solution, makes complexing agent alkaline solution;

[0043] Five,...

Embodiment 3

[0051] Nano LiNi 0.5 co 0.2 mn 0.3 o 2 Taking material synthesis as an example, the synthesis method includes the following steps:

[0052] 1. Evenly mix the surfactant Triton X-100 and the co-surfactant n-butanol and cyclohexane to make an emulsifier, and divide the emulsifier into the first equal part emulsifier and the second equal part emulsification agent;

[0053] 2. Dissolve nickel salt, cobalt salt and manganese salt in deionized water, stir evenly, and prepare an aqueous solution with a concentration of 2.0mol / L;

[0054] 3. Mix the aqueous solution with a concentration of 2.0mol / L in step 2 with the first aliquot emulsifier in step 1, stir evenly, and stir at room temperature for 20min to make a nickel-cobalt-manganese salt microemulsion;

[0055] Four, preparation concentration is the alkaline solution of 3mol / L, and adding concentration is the complexing agent of 1mol / L in alkaline solution, makes complexing agent alkaline solution;

[0056] Five, the complex...

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Abstract

The invention belongs to a method for preparing a nano ternary composite lithium ion anode material by utilizing a microemulsion. The method comprises the following steps: firstly, mixing a surfactant triton X-100 and a cosurfactant n-butyl alcohol with cyclohexane so as to prepare an emulgator; secondly, dissolving nickel salt, cobalt salt and manganese salt into deionized water; thirdly, preparing nickel, cobalt and manganese salt microemulsion; fourthly, preparing complexing agent aqueous alkali; fifthly, preparing alkali microemulsion; sixthly, adding the nickel, cobalt and manganese salt microemulsion into a reaction kettle; seventhly, adding alkali microemulsion dropwise into the nickel, cobalt and manganese salt microemulsion so as to prepare a turbidimetric solution; eighthly, standing the turbidimetric solution still so as to prepare a NixCoyMn(1-x-y)(OH)2 precursor; ninthly, carrying out ball-milling on the NixCoyMn(1-x-y)(OH)2 precursor and a lithium compound, mixing uniformly, and sieving; and tenthly, preparing the sieved mixture into a nano spherical LiNixCoyMn(1-x-y)(OH)2 anode material. The nano ternary composite lithium ion anode material has favorable cycle stability.

Description

technical field [0001] The invention belongs to the technical field of synthesis technology of positive electrode materials of lithium ion batteries, and in particular relates to a method for preparing nanometer ternary composite lithium ion positive electrode materials by using microemulsion. Background technique [0002] Lithium-ion batteries have the advantages of high discharge voltage, high specific energy, long cycle life, good safety and environmental friendliness, and are currently the most promising portable chemical power sources. Its main component is the lithium intercalation compound cathode material, which occupies a relatively large proportion in lithium-ion batteries, and the quality of the cathode material is the performance index that determines the lithium-ion battery product, and has become a bottleneck restricting the development of high-performance lithium-ion batteries. With the rapid popularization of portable electronic devices, the requirements for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525B82Y30/00B82Y40/00
CPCB82Y30/00H01M4/505H01M4/525Y02E60/10
Inventor 李华张志如尹盛玉袁文访杨红帅郑丽丽
Owner XINXIANG JINRUN TECH
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