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Quaternary lithium-ion battery positive electrode material and preparation method thereof

A lithium-ion battery, cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of not reaching industrialized production, poor sintering performance of powder materials, low productivity, etc., to overcome capacity loss and improve overall performance. , Improve the effect of energy storage

Active Publication Date: 2013-07-31
重庆神驰电池有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the above battery system is that lithium cobalt oxide and ternary positive electrode materials contain more expensive cobalt elements, resulting in high prices
The sintering performance of powder materials is poor, and the synthesis conditions are also harsher than solid-state methods
The above unfavorable factors lead to low productivity and high cost of materials
At present, the process of sol-gel synthesis of lithium-ion battery cathode materials has not yet met the requirements of industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a quaternary lithium ion battery cathode material includes the following steps:

[0028] (1) Prepare spherical stencil emulsion, weigh in percentage by weight: No. 10 motor oil 5%, alkylphenol polyoxyethylene ether (APEO) 10%, dimethyl silicone oil 0.1%, sorbitol 0.01%, and the balance is distilled water; Mix and stir for 1 hour to obtain milky white liquid;

[0029] (2) The molar ratio is 80:15:3:2. Dissolve nickel sulfate, cobalt sulfate, aluminum sulfate and manganese sulfate in water to make the sum of nickel sulfate, cobalt sulfate, aluminum sulfate and manganese sulfate. 0.5mol / L solution;

[0030] (3) Add the liquid obtained in step (1) to the solution obtained in step (2) at a weight ratio of 1:10, and stir for 1 hour;

[0031] (4) Under stirring, take 15 hours to add a 1mol / L lithium hydroxide aqueous solution to the liquid obtained in step (3) to make the pH value 10, so that the (Ni 0.8 Co 0.15 Al 0.03 Mn 0.02 )(OH) 2 Uniformly layered and de...

Embodiment 2

[0035] A preparation method of a quaternary lithium ion battery cathode material includes the following steps:

[0036] (1) Prepare spherical stencil emulsion, weigh in weight percentage: No. 20 motor oil 6%, fatty alcohol polyoxyethylene ether (AEO) 20%, simethicone 0.5%, sorbitol 0.05%, and the balance is distilled water; mix Stir for 2 hours to obtain milky white liquid;

[0037] (2) The molar ratio is 80:15:3:2. The concentration of nickel nitrate, cobalt nitrate, aluminum nitrate and manganese nitrate is dissolved in water to form the sum of nickel nitrate, cobalt nitrate, aluminum nitrate and manganese nitrate. 1mol / L solution;

[0038] (3) Add the liquid obtained in step (1) to the solution obtained in step (2) in a weight ratio of 1:12, and stir for 2 hours;

[0039] (4) Under stirring, add a lithium hydroxide aqueous solution with a concentration of 5mol / L to the liquid obtained in step (3) for 20 hours to make the pH value 11, so that the produced (Ni 0.8 Co 0.15 Al 0.03 Mn...

Embodiment 3

[0043] A preparation method of a quaternary lithium ion battery cathode material includes the following steps:

[0044] (1) Prepare spherical stencil emulsion, weigh in percentage by weight: No. 10 motor oil 7%, fatty acid polyoxyethylene ester (AE) 30%, simethicone 0.8%, benzoic acid 0.1%, the balance is distilled water; mix and stir 3 hours, get milky white liquid;

[0045] (2) The molar ratio is 80:15:3:2. The concentration of nickel nitrate, cobalt nitrate, aluminum nitrate and manganese nitrate is dissolved in water to form the sum of nickel nitrate, cobalt nitrate, aluminum nitrate and manganese nitrate. 1.5mol / L solution;

[0046] (3) Add the liquid obtained in step (1) to the solution obtained in step (2) in a weight ratio of 1:15, and stir for 2 hours;

[0047] (4) Under stirring, add a sodium hydroxide aqueous solution with a concentration of 6 mol / L to the liquid obtained in step (3) for 25 hours to make the pH value 12, so that the (Ni 0.8 Co 0.15 Al 0.03 Mn 0.02 )(OH) 2 ...

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Abstract

The invention discloses a quaternary lithium-ion battery positive electrode material and a preparation method thereof. A molecular formula of the quaternary lithium-ion battery positive electrode material is LiNi0.8Co0.15Al0.03Mn0.02O2, a 0.2 C discharge capacity at a room temperature of 180-185mAh / g; and weight ratio energy is 650-661 Wh / Kg. The LiNi0.8Co0.15Al0.03Mn0.02O2 prepared by the method has a uniform sphere structure, and at the same time, due to the effect of a template, the prepared quaternary lithium-ion battery positive electrode material is beneficial to store electrolyte and overcome capacity loss caused by incomplete reaction of materials at core part. The quaternary lithium-ion battery positive electrode material greatly increases storage energy of the material, can prepare lithium ion power battery with light weight and high capacity, and can be widely applied in situations of electrical vehicles, electric bicycles, electric tools, etc.

Description

Technical field [0001] The invention relates to a preparation method of a lithium ion battery cathode material. Background technique [0002] Lithium-ion batteries have the characteristics of high specific energy, light weight, safety, environmental protection, and stable performance. They have been widely used in mobile phones, digital appliances, electric vehicles, power tools, and many other fields that require energy carriers. Currently commercial lithium-ion batteries on the market can be divided into lithium iron phosphate batteries, lithium cobalt oxide batteries, and ternary material batteries according to different cathode materials. Among them, the lithium iron phosphate battery has a relatively low specific energy, which can only reach 100-130Wh / Kg, but the safety is the best. Lithium cobalt oxide and ternary material batteries can reach a high energy density close to 200Wh / Kg, especially lithium cobalt oxide batteries, which currently have a volumetric specific energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/1391
CPCY02E60/122Y02E60/10
Inventor 王晓薇张春丽
Owner 重庆神驰电池有限责任公司
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