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Lithium battery positive electrode material and production process thereof

A positive electrode material and production process technology, applied in the field of lithium battery positive electrode materials and its production process, can solve problems such as differences in heating, faults in lithium battery positive electrode materials, and poor product consistency, achieving good consistency, good uniformity, and improved The effect of uniformity

Pending Publication Date: 2022-03-29
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the sintering process, the upper and lower layers of the heat preservation zone of the roller kiln are usually set to the same sintering temperature, but in actual operation, since the material to be sintered is packed in a sagger, the actual heating of the surface layer and the bottom layer of the material to be sintered will be different In the actual sintering process, the heating temperature of the surface layer of the material to be sintered will be higher, which will lead to faults in the upper and lower layers of the final lithium battery cathode material, and the consistency of the product is poor

Method used

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  • Lithium battery positive electrode material and production process thereof
  • Lithium battery positive electrode material and production process thereof
  • Lithium battery positive electrode material and production process thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] A kind of LiNi 0.5476 co 0.1195 mn 0.3286 Zr 0.0043 o 2 The production process of positive electrode material comprises the following steps:

[0030] (1) Test temperature difference: the Ni of 10000 parts by weight 0.55 co 0.12 mn 0.33 (OH) 2 Precursor, lithium carbonate of 4250 parts by weight and ZrO of 36 parts by weight 2 Mix well, put into a sagger, and at the same time as image 3 As shown, two temperature measuring coffins 101 equipped with temperature measuring blocks 104 are respectively embedded in the bottom layer and the surface layer of the material during the bowl loading process. The amount of material is 1 row, and 8 emptying saggers are fed into the front and back of the feeding sagger to bring temperature, so as to ensure that the temperature of the material is basically the same as that of the material when the kiln continues to feed, and then in the aerobic atmosphere Carry out high-temperature sintering, wherein the temperature measuring c...

Embodiment 2

[0035] A kind of LiNi 0.6438 co 0.06933 mn 0.2773 Zr 0.0037 Al 0.0058 o 2 The production process of positive electrode material comprises the following steps:

[0036] (1) Test temperature difference: the Ni of 10000 parts by weight 0.65 co 0.08 mn 0.27 (OH) 2 Precursor, lithium hydroxide of 4640 parts by weight and ZrO of 29 parts by weight 2 , 19 parts by weight of Al 2 o 3 Mix well, put into a sagger, and at the same time as Figure 4As shown, two temperature measuring coffins 101 equipped with temperature measuring rings 105 are respectively embedded in the bottom layer and the surface layer of the material during the bowl loading process. The amount of material is 1 row, and 8 emptying saggers are fed into the front and back of the feeding sagger to bring temperature, so as to ensure that the temperature of the material is basically the same as that of the material when the kiln continues to feed, and then in the aerobic atmosphere Carry out high-temperature ...

Embodiment 3

[0041] A kind of LiNi 0.6904 co 0.0493 mn 0.2466 Zr 0.0042 Al 0.0054 B 0.0042 o 2 The production process of positive electrode material comprises the following steps:

[0042] (1) Test temperature difference: the Ni of 10000 parts by weight 0.70 co 0.05 mn 0.25 (OH) 2 Precursor, lithium hydroxide of 4780 parts by weight and ZrO of 36 parts by weight 2 , 19 parts by weight of Al 2 o 3 , 10 parts by weight of B 2 o 3 Mix evenly and put it into a sagger. During the filling process, two temperature-measuring coffins equipped with temperature-measuring blocks are buried in the bottom layer and surface layer of the material respectively. The amount of material is 1 row, and 8 emptying saggers are fed into the front and back of the feeding sagger to bring temperature, so as to ensure that the temperature of the material is basically the same as that of the material when the kiln continues to feed, and then in the aerobic atmosphere High temperature sintering, in which ...

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Abstract

The invention discloses a production process of a lithium battery positive electrode material, which comprises the following steps: (1) testing temperature difference: putting a to-be-sintered material into a sagger, putting the sagger into a roller kiln heat preservation area, setting the same sintering temperature t at the upper layer and the lower layer of the roller kiln heat preservation area according to the characteristics of the to-be-sintered material, and sintering in a specific atmosphere, measuring the temperature difference delta t between the surface layer and the bottom layer of the material in the sintering process; and (2) formal sintering: putting the to-be-sintered material into a sagger, putting the sagger into a heat preservation area of the roller kiln, and sintering the to-be-sintered material in a specific atmosphere according to the temperature difference delta t measured in the step (1) by setting the sintering temperature of the upper layer of the heat preservation area of the roller kiln as t and the sintering temperature of the lower layer as (t + delta t). The production process can effectively improve the consistency of the prepared lithium battery positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of production of positive electrode materials of lithium ion batteries, and in particular relates to a positive electrode material of lithium batteries and a production process thereof. Background technique [0002] In September 2020, my country officially proposed a green development strategy of "strive to peak carbon dioxide emissions before 2030 and strive to achieve carbon neutrality before 2060". Replacing traditional fossil energy with green new energy and reducing carbon dioxide emissions will be a crucial part of the process of achieving "carbon neutrality". Conventional clean energy includes lithium-ion batteries, hydrogen energy, wind energy, solar energy, nuclear energy, etc. Obviously, the lithium-ion battery with the highest commercialization process will be a new force to help realize the ambitious goals of "carbon peak" and "carbon neutrality". [0003] Continuously improving the energy dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B9/30F27B9/40H01M4/139H01M10/0525
CPCF27B9/30F27B9/40H01M4/139H01M10/0525H01M2004/028Y02E60/10H01M4/525H01M4/505H01M4/0471H01M4/1391H01M4/131
Inventor 汪乾李长东阮丁山刘伟健刘婧婧蔡勇
Owner GUANGDONG BRUNP RECYCLING TECH
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