Polybasic layered oxide lithium ion battery material and preparation method thereof

A technology for lithium-ion batteries and battery materials, which is applied in the field of multi-layered oxide lithium-ion battery materials and its preparation, can solve the problems of expensive Co element and high battery cost, and achieve good reversibility of charge and discharge, cycle Improved performance and good cycle performance

Inactive Publication Date: 2013-05-01
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is well known that LiCoO 2 As a lithium-ion battery material, the material has a relatively high specific capacity and good cycle stability, but the Co element is relatively expensive, which makes the cost of the entire battery remain high.

Method used

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  • Polybasic layered oxide lithium ion battery material and preparation method thereof
  • Polybasic layered oxide lithium ion battery material and preparation method thereof
  • Polybasic layered oxide lithium ion battery material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 : Weigh 0.00512mol Ni(NO 3 ) 2 ·6H 2 O, 0.00064mol Co(NO 3 ) 2 ·6H 2 O, 0.00064mol Mn(NO 3 ) 2 and 0.0064mol urea were dissolved in 64 mL solvent (ethanol: water = 4:1), and the corresponding concentrations of nickel, cobalt, and manganese in the solution obtained after mixing were 0.08, 0.01, and 0.01 mol / L, respectively. Then the mixed solution was transferred to a 100mL reaction kettle, reacted at 180°C for 7.5 hours, naturally cooled to room temperature, centrifuged, and dried at 60°C for 12 hours to obtain the precursor (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 .

[0028] 2) Disperse 20mL of 0.00673mol / L aluminum nitrate solution with 0.25g (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 After fully mixing the 30m aqueous solution, transfer it to a 90 mL reaction kettle and react at 150°C for 4 hours, naturally cool to room temperature, centrifuge, and dry at 60°C to obtain a precursor with an optimized composition. Its molecular f...

Embodiment 2

[0034] (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 The preparation is with embodiment 1.

[0035] 20mL of 0.00673mol / L aluminum acetate solution and dispersed with 0.25g (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 Mix 30mL of aqueous solution of the solution and transfer it to a 90mL reactor for 4 hours at 120°C for 4 hours, naturally cool to room temperature, centrifuge, and dry at 60°C to obtain a precursor with optimized composition. Then it is fully mixed with lithium hydroxide in a stoichiometric ratio, and then calcined at 480° C. for 5 hours and 650° C. for 12 hours respectively to obtain a multi-layered oxide lithium ion battery material.

[0036] The lithium-ion battery material with optimized composition prepared by the above steps was made into a bonded electrode for charge and discharge tests. The results showed that the discharge specific capacity of the prepared multi-layered oxide lithium-ion battery material was about 160 mAh / g.

Embodiment 3

[0038] (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 The preparation is with embodiment 1.

[0039] The aluminum nitrate solution of 20mL 0.00673mol / L and the precursor (Ni 0.8 co 0.1 mn 0.1 )(OH) 2 30mL of the aqueous solution was fully mixed and then transferred to a 90mL reactor to react at 160°C for 4 hours, naturally cooled to room temperature, centrifuged, and dried at 60°C to obtain a precursor with optimized composition. Then, it is fully mixed with lithium hydroxide in a stoichiometric ratio, and then calcined at 500° C. for 5 hours and 650° C. for 12 hours respectively to obtain a multi-layered oxide lithium ion battery material.

[0040] The lithium-ion battery material with optimized composition prepared by the above steps was made into a bonded electrode for charge and discharge tests. The results showed that the discharge specific capacity of the prepared multi-layered oxide lithium-ion battery material was about 160 mAh / g.

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Abstract

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a polybasic layered oxide lithium ion battery material and a preparation method thereof. The battery material is shown as Li(Ni1-x-y-zCoxMnyMz)O2, wherein M is Zn, Mg, Al, Cu, As, Cd or Pd; and each metal element in a single particle of the material is distributed in a graded way at different thickness distances away from the center of the particle. The polybasic layered oxide lithium ion battery material which is easy to regulate and control is prepared successfully by adopting the simple and practicable method. As proved by an electrochemical test result, the polybasic layered oxide lithium ion battery material provided by the invention has high charging and discharging reversibility and high cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, in particular to a multi-layered oxide lithium-ion battery material and a preparation method thereof. Background technique [0002] At present, lithium-ion batteries have become the main batteries used in various mobile communication devices and electric tools due to their high specific energy and long life. At the same time, their applications in electric bicycles, electric vehicles and other fields are gradually expanding. The application makes the annual production and consumption of lithium-ion batteries huge. However, in the market of mobile devices such as mobile phones and notebooks that use lithium-ion batteries in large quantities, most of the currently dominant lithium-ion batteries still use LiCoO, which was the first to enter the commercial market. 2 Material. [0003] It is well known that LiCoO 2 As a lithium-ion battery material, the material has a relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122Y02E60/10
Inventor 陈卫华张建民米立伟赵娟娟李绍
Owner ZHENGZHOU UNIV
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