Composition, preparation method and application of composition to ion battery positive electrode material

A composition and raw material technology, applied in the field of lithium-ion batteries, can solve problems such as complex process and high cost, and achieve the effects of simple and reliable process, improved processing performance, and easy availability of raw materials

Inactive Publication Date: 2019-06-18
深圳新恒业电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a composition, a preparation method and its application in the positive electrode material of the ion battery, which are used to solve the problems in the prior art, such as the complex process, the Costly Technical Defects

Method used

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  • Composition, preparation method and application of composition to ion battery positive electrode material

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Experimental program
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Effect test

Embodiment 1

[0027] After 100g lithium nickel cobalt manganese oxide 1 is mixed with 100g liquid phase solvent 1, stir 30min with the rotating speed of 1500r / min, add 10g nano zirconium sol (solid content 20%, pH is less than 7) and stir 40min with the rotating speed of 1000r / min, Obtain slurry 1. In this embodiment, the molar ratio of nickel, cobalt, and manganese in nickel-cobalt lithium manganese oxide 1 is 90:5:5, and the liquid phase solvent 1 is deionized water.

[0028] Slurry 1 was filtered, dried and heat-treated in sequence to obtain Product 1. In this embodiment, the heat treatment method is as follows: in an oxygen atmosphere, treat at 900° C. for 8 hours and then cool to room temperature.

Embodiment 2

[0030] After 90g lithium nickel cobalt manganese oxide 2 is mixed with 80g liquid phase solvent 2, stir 10min with the rotating speed of 1000r / min, add 5g nano aluminum sol (solid content 20%, pH is less than 7) and stir 30min with the rotating speed of 1000r / min, Obtain slurry 2. In this embodiment, the molar ratio of nickel, cobalt, and manganese in nickel-cobalt lithium manganate 2 is 80:10:10, and the liquid phase solvent 2 is ethanol.

[0031] Slurry 2 is filtered, dried and heat-treated in sequence to obtain product 2. In this embodiment, the heat treatment method is as follows: in an oxygen atmosphere, treat at 300° C. for 12 hours and then cool to room temperature.

Embodiment 3

[0033] After 100g lithium nickel cobalt manganese oxide 3 is mixed with 150g liquid phase solvent 3, stir 5min with the rotating speed of 800r / min, add 15g nano-titanium sol (solid content 20%, pH is less than 7) after stirring 20min with the rotating speed of 1500r / min, Obtain slurry 3. In this embodiment, the molar ratio of nickel, cobalt, and manganese in nickel-cobalt lithium manganate 3 is 80:10:10, and the liquid phase solvent 3 is propanol.

[0034] Slurry 3 was filtered, dried and heat-treated in sequence to obtain product 3. In this embodiment, the heat treatment method is as follows: in an oxygen atmosphere, treat at 300° C. for 6 hours and then cool to room temperature.

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a composition, a preparation method and an application of the composition to an ion battery positiveelectrode material. The composition comprises nickel cobalt lithium manganate, nano-sol and a liquid-phase solvent, wherein the nano-sol is selected from one or more of nano-aluminum sol, nano-titanium sol, nano-silicon sol, nano-yttrium sol, nano-silicon aluminum sol and nano-silicon zirconium sol; and the pH value of the nano-sol is less than 7. The invention also provides the preparation methodof the composition, and an application of the composition or a product obtained by the preparation method to the lithium ion battery positive electrode material. The preparation method is simple andconvenient, and the raw materials are low in price and easy to obtain; after the battery is prepared, a charge-discharge cycle test is carried out, and the first effect and the 100-cycle capacity retention rate are both superior to those of a reference substance; and the technical defects that in the prior art, a coating technology of the nickel cobalt lithium manganate positive electrode materialis complex in process and high in cost are overcome.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a composition, a preparation method and an application thereof in positive electrode materials of ion batteries. Background technique [0002] The high-nickel-nickel-cobalt lithium manganese oxide cathode material widely used in lithium-ion batteries, due to its high pH value, is easy to absorb water during the homogenization process, causing the slurry jelly phenomenon, which affects the processing performance. [0003] In the prior art, by coating the positive electrode material of nickel-cobalt lithium manganese oxide with metal oxide, the interface of the material can be significantly improved, the direct contact between the material and the electrolyte is avoided, and the occurrence of side reactions is reduced. At the same time, the surface coating Modification can significantly improve performance stability. However, the coating process of nickel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/525H01M4/485H01M10/052H01M4/62
CPCY02E60/10
Inventor 王高峰蔡国强周松梁小惠谢浩谢正伟
Owner 深圳新恒业电池科技有限公司
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