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Cobalt-nickel lithium manganate composite positive electrode material with surface wrapped by lithium zirconate and preparation method

A composite positive electrode material, nickel-cobalt lithium manganese oxide technology, applied in positive electrodes, battery electrodes, active material electrodes, etc., can solve the problems of poor rate performance and cycle performance, and achieve simple process, low cost, and excellent cycle performance Effect

Inactive Publication Date: 2015-12-09
GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention mainly solves LiNi 0.8 co 0.1 mn 0.1 o 2 Applied to the problems of poor rate performance and cycle performance in lithium-ion battery cathode materials, a nickel-cobalt-lithium-manganese-oxide composite cathode material with lithium zirconate coated on the surface and a preparation method are provided

Method used

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  • Cobalt-nickel lithium manganate composite positive electrode material with surface wrapped by lithium zirconate and preparation method
  • Cobalt-nickel lithium manganate composite positive electrode material with surface wrapped by lithium zirconate and preparation method
  • Cobalt-nickel lithium manganate composite positive electrode material with surface wrapped by lithium zirconate and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A surface-coated Li 2 ZrO 3 LiNi 0.8 co 0.1 mn 0.1 o 2 The preparation method of composite cathode material, its specific steps are as follows:

[0039] (1) Weigh 5.97g of nickel acetate tetrahydrate, 0.75g of cobalt acetate tetrahydrate, and 0.74g of manganese acetate tetrahydrate into 100ml of secondary deionized water, stir well to form a stable suspension A with a concentration of 74.6g / L;

[0040] (2) Weigh 1.24g of lithium acetate and dissolve it in 100ml of secondary deionized water, stir well to form a stable solution B with a concentration of 12.4g / L;

[0041] (3) Add solution B in step (2) dropwise to suspension A in step (1) at a rate of 30ml / min, stir at room temperature for 2h, then place the mixed solution at 90°C and heat 8h, keep stirring during the heating process, and finally heat at 120°C to remove moisture to obtain a dry precursor;

[0042] (4) Grinding the precursor obtained in step (3) in a dry environment for 15 minutes to obtain a dry pre...

Embodiment 2

[0053] A surface-coated Li 2 ZrO 3 LiNi 0.8 co 0.1 mn 0.1 o 2 The preparation method of composite cathode material, its specific steps are as follows:

[0054] (1) Weigh 9.95g of nickel acetate tetrahydrate, 1.25g of cobalt acetate tetrahydrate, and 1.23g of manganese acetate tetrahydrate into 100ml of secondary deionized water, stir well to form a stable suspension A with a concentration of 134.2g / L;

[0055] (2) Weigh 2.10g of lithium acetate and dissolve it in 100ml of secondary deionized water, stir well to form a stable solution B with a concentration of 21.0g / L;

[0056] (3) Add solution B in step (2) dropwise to suspension A in step (1) at a rate of 25ml / min, stir at room temperature for 4 hours, then place the mixed solution at 80°C and heat 10h, keep stirring during the heating process, and finally heat at 120°C to remove moisture to obtain a dry precursor;

[0057] (4) Grinding the precursor obtained in step (3) in a dry environment for 20 minutes to obtain a ...

Embodiment 3

[0063] A surface-coated Li 2 ZrO 3 LiNi 0.8 co 0.1 mn 0.1 o 2 The preparation method of composite cathode material, its specific steps are as follows:

[0064] (1) Weigh 7.96g of nickel acetate tetrahydrate, 1.00g of cobalt acetate tetrahydrate, and 0.99g of manganese acetate tetrahydrate into 100ml of secondary deionized water, stir well to form a stable suspension A with a concentration of 99.5g / L;

[0065] (2) Weigh 1.70g of lithium nitrate and dissolve it in 100ml of secondary deionized water, stir well to form a stable solution B with a concentration of 17.0g / L;

[0066] (3) Add solution B in step (2) dropwise to suspension A in step (1) at a rate of 30ml / min, stir at room temperature for 3h, then place the mixed solution at 70°C and heat 12h, keep stirring during the heating process, and finally heat at 110°C to remove moisture to obtain a dry precursor;

[0067] (4) Grinding the precursor obtained in step (3) in a dry environment for 15 minutes to obtain a dry pr...

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Abstract

The invention discloses a cobalt-nickel lithium manganate composite positive electrode material with the surface wrapped by lithium zirconate and a preparation method. The preparation method includes the steps of firstly, preparing LiNi0.8Co0.1Mn0.1O2 through a wet chemistry method with soluble salt of nickel, cobalt and manganese and excessive lithium salt as raw materials; secondly, mixing LiNi0.8Co0.1Mn0.1O2 with zirconium nitrate, and preparing the LiNi0.8Co0.1Mn0.1O2 composite positive electrode material with the surface wrapped by Li2ZrO3 through a rheological phase method. The LiNi0.8Co0.1Mn0.1O2 composite positive electrode material with the surface wrapped by Li2ZrO3 has the advantages of being excellent in circulation performance, good in rate capability, simple and convenient in preparation process, low in cost, and the like, and is beneficial for being applied and popularized on a large scale as the positive electrode material of lithium ion batteries.

Description

technical field [0001] The invention relates to the field of energy and new materials, and relates to a lithium-ion secondary battery positive electrode material and a preparation method, in particular to a nickel-cobalt lithium manganate composite positive electrode material with lithium zirconate coated on the surface and a preparation method thereof. Background technique [0002] At present, lithium-ion batteries have been widely used in the 3C industry, namely computer (Computer), communication (Communication) and consumer electronics (ConsumerElectronic) products, and gradually enter the market represented by electric vehicles (EV) and hybrid electric vehicles (HEV). Power batteries and other fields. Ternary cathode material LiNi 0.8 co 0.1 mn 0.1 o 2 Because of its high specific capacity and low cost, it is considered to be the most likely to replace the current commercial LiCoO 2 One of the new cathode materials. [0003] LiNi 0.8 co 0.1 mn 0.1 o 2 It is clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/366H01M4/505H01M4/525H01M4/628H01M10/0525H01M2004/028H01M2220/20H01M2220/30Y02E60/10
Inventor 曾宪武曾洪华
Owner GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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