Manufacturing method of high-compaction lithium battery positive electrode material nickel cobalt lithium manganate
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A technology of nickel-cobalt lithium manganese oxide and positive electrode materials, which is applied in the direction of battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of not being able to increase the compaction density, achieve high cost performance, enhance compactness, and increase single crystal particle size Effect
Pending Publication Date: 2020-09-25
HENAN FUSEN NEW ENERGY TECH
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This invention effectively improves the capacity performance and cycle performance of lithium battery cathode materials, but cannot improve the compaction density
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Embodiment 1
[0032] (1) Material preparation: select 1 kg of nickel hydroxide, cobalt and manganese (nickel: cobalt: manganese = 5:2:3), and calculate the corresponding battery grade lithium carbonate and strontium hydroxide according to the molar ratio of metal content 1: 1.1 and 1: 0.003 ;
[0033] (2) Lithium mixing: mix the three raw materials evenly;
[0034] (3) High-temperature calcination: the mixed product is placed in a high-temperature kiln for calcination, the calcination temperature is 900-950 ℃, and the calcination time is 14 hours;
[0035] (4) After calcination, the product is crushed and crushed to obtain a finished product.
Embodiment 2
[0037] (1) Material preparation: select 1 kg of nickel hydroxide, cobalt and manganese (nickel: cobalt: manganese = 5:2:3), and calculate the corresponding battery grade lithium carbonate and strontium hydroxide according to the molar ratio of metal content 1: 1.1 and 1: 0.005 ;
[0038] (2) Lithium mixing: mix the three raw materials evenly;
[0039] (3) High-temperature calcination: the mixed product is placed in a high-temperature kiln for calcination, the calcination temperature is 900-950 ℃, and the calcination time is 14 hours;
[0040] (4) After calcination, the product is crushed and crushed to obtain a finished product.
[0041] Comparative example and embodiment detection parameter are as follows table 1.
[0042] Table 1 Parameters of compaction density test
[0043]
[0044] The compaction density after passing through the roller machine is as follows: comparative example: 3.61g / cm³, embodiment 1: 3.68g / cm³, embodiment 2: 3.75g / cm³.
[0045] See the accompanyi...
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Abstract
The invention discloses a manufacturing method of a high-compaction lithium battery positive electrode material nickel cobalt lithium manganate, which belongs to the technical field of lithium ion battery positive electrode material nickel cobalt lithium manganate, and comprises the following steps of (1) material preparation: selecting nickel cobalt manganese hydroxide, battery grade lithium carbonate and strontium hydroxide, (2) lithiation mixing: uniformly mixing the three raw materials, (3) high-temperature calcination: calcining the mixed product in a high-temperature kiln, and (4) crushing and crushing the calcined product to obtain a finished product. The invention provides a method for doping strontium hydroxide and improving compaction of nickel cobalt lithium manganate in a conventional production process, and the method is combined with a high-temperature solid-phase reaction in the production process of nickel cobaltlithium manganate, so that the particle size of a productsingle crystal is increased, the combination tightness of each single crystal is enhanced, and the method has relatively high economic usability and safety.
Description
technical field [0001] The invention relates to the technical field of nickel-cobalt-lithium manganese oxide, a positive electrode material of a lithium ion battery, and in particular to a method for manufacturing a high-pressure lithium battery positive electrode material, nickel-cobalt lithium manganese oxide. Background technique [0002] Lithium nickel cobalt manganese oxide is an important part of lithium batteries. With the rapid development of the lithium battery industry, the old generation of positive electrode materials has been difficult to meet the growing demand for power supply of portable devices, requiring higher compaction density and higher safety. New positive electrode materials with high performance and high capacity can replace the original old generation positive electrode materials. [0003] At present, lithium nickel cobalt manganese oxide has occupied a dominant position in communication batteries. In the field of electric tools, lithium nickel coba...
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