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Spheral anode material for producing lithium battery and preparation method thereof

A technology of positive electrode material and production method, applied in the direction of electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of many control conditions, high production cost, long reaction time, etc., achieve low cost, reduce energy consumption and cost , The effect of simple reaction process

Inactive Publication Date: 2010-01-13
深圳市源源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The synthesis of existing spherical lithium manganese (being Ni-Mn) oxide is to use NaOH or Na 2 CO 3 Co-precipitation methods, these methods generally use NH 4 OH or into CO 2 To control the pH value of the co-precipitation solution, there are many control conditions in the reaction process, or the reaction time is long, the equipment is relatively complicated, the production cost is high, the process is complicated, and the product is difficult to be widely used in the production of lithium batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] To contain 1mol / l MnSO 4 And 1mol / l NiSO 4 Add 1mol / l NaHCO to 100ml of mixed solution while stirring 3 The solution is 410ml, and the stirring speed used is 450rmp;

[0017] After stirring for 2 hours, it was filtered, and the filtered product was washed with distilled water. After the filtration was repeated 3 times, it was dried at 100 degrees for 4 hours to obtain sample 1.

[0018] Sample 1 is very easy to filter, and does not agglomerate after drying and does not need to be crushed. The x-ray diffraction pattern of sample 1 shows that the obtained compound has MnCO 3 Single phase (Ni, Mn)CO with crystalline structure 3 , Scanning electron microscope photos can show that most of the product is spherical particles.

Embodiment 2

[0020] The product 1 was fired at 500 degrees in air for 8 hours to obtain sample 2. The x-ray diffraction pattern of sample 2 shows that its structure is a single phase NiMnO 3 , Scanning electron microscope photos can show that the fired product retains the shape of sample 1.

Embodiment 3

[0022] Sample 2 and LiOH·H 2 After O was weighed at a molar ratio of 1:1.04, mixed on an automatic mixer for 1 hour, fired at 900 degrees in the air for 8 hours and slowly cooled down to obtain sample 3. The x-ray diffraction pattern of sample 3 shows that the obtained single-phase LiNi with a layered structure 0.5 Mn 0.5 O 2 , Scanning electron microscope photos can show that LiNi is obtained after firing 0.5 Mn 0.5 O 2 The particle shape of the cathode material still maintains a spherical shape, and the packing density is 2.0g / cm 3 .

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Abstract

The invention relates to a spheral anode material for producing a lithium battery and a preparation method thereof. Existing synthesis of spheral lithium manganese (i.e. Ni-Mn) oxide requires numerous control conditions, long reaction time, complex apparatuses and high production cost. In the preparation method, NaHCO3 is utilized as a coprecipitator to prepare spheral Ni-Mn carbonate, and the process is simple and strongly controllable. A spheral intermediate product is burnt to obtain the spheral Ni-Mn oxide. The spheral intermediate product or the spheral Ni-Mn-O is mixed with Li salt, the mixture is burnt, and then the high-performance spheral Li-Ni-Mn-O anode material for the lithium battery can be prepared. The spheral anode material has high stocking density so that the packing density of the anode of the lithium battery can be improved and the aim of improving the discharge capacity of the lithium battery and assembling the high-performance lithium battery can be achieved. The preparation method has a simple and strongly controllable reaction process, can reduce the number of procedures, the energy consumption and the cost, has low cost and wide application range and is favorable for generalization.

Description

Technical field [0001] The invention relates to the field of battery production, in particular to a spherical anode material for producing lithium batteries and a manufacturing method thereof. Background technique [0002] The existing spherical lithium manganese (ie Ni-Mn) oxide is synthesized using NaOH or Na 2 CO 3 Co-precipitation methods, these methods generally use NH 4 OH or access CO 2 To control the pH value of the co-precipitation solution, there are many control conditions during the reaction process, or the reaction time is long, the equipment is more complicated, the production cost is high, the process is complicated, and the product is difficult to be widely used in the production of lithium batteries. Summary of the invention [0003] The purpose of the present invention is to provide a spherical cathode material for the production of lithium batteries and a manufacturing method thereof, using NaHCO 3 As a co-precipitation reagent to prepare spherical Ni-Mn carbonat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/50H01M4/52H01M4/04H01M10/38
CPCY02E60/12Y02E60/10
Inventor 汤卫平王毅
Owner 深圳市源源新材料科技有限公司
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