Nickel cobalt lithium manganate positive electrode material and preparation method thereof, lithium ion battery positive electrode slurry, lithium ion battery positive electrode and lithium ion battery

A technology of lithium-nickel-cobalt-manganese-manganese-oxide and lithium-ion batteries, applied in nickel-cobalt-lithium-manganese-oxide cathode materials and its preparation, and in the field of lithium-ion battery cathodes. Performance and other issues, to achieve the effect of reducing impedance, increasing layer spacing, improving structural stability and conductivity

Active Publication Date: 2022-05-13
SOUNDON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor conductivity and large internal resistance of the nickel-cobalt lithium manganate cathode material, it will eventually affect the rate performance and cycle performance of lithium-ion batteries.

Method used

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  • Nickel cobalt lithium manganate positive electrode material and preparation method thereof, lithium ion battery positive electrode slurry, lithium ion battery positive electrode and lithium ion battery
  • Nickel cobalt lithium manganate positive electrode material and preparation method thereof, lithium ion battery positive electrode slurry, lithium ion battery positive electrode and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Preparation of nickel cobalt lithium manganese oxide cathode material:

[0065] NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O is mixed and placed in a beaker according to the molar ratio of 0.6:0.2:0.19, and dissolved in deionized water to obtain a solution with a metal ion concentration of 1.5mol / L;

[0066] Slowly add 3.0mol / L NaOH solution and 1.2mol / L ammonia water into the above solution according to the volume ratio of 1:1, adjust the pH to 10, stir in a 50°C water bath until the precipitation is complete, and wash it with deionized water several times at the same time; Soak the obtained precipitate in absolute ethanol for 1 hour, and then dry the precipitate in a constant temperature vacuum box at 85°C for 12 hours to obtain the nickel cobalt lithium manganese oxide cathode material precursor Ni 0.6 co 0.2 mn 0.19 (OH) 2 .

[0067] Mix the precursor of nickel cobalt lithium manganese oxide positive electrode material and basic copper carbonate according...

Embodiment 2

[0074] Preparation of nickel cobalt lithium manganese oxide cathode material:

[0075] NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O is mixed and placed in a beaker according to the molar ratio of 0.6:0.2:0.18, and dissolved in deionized water to obtain a solution with a metal ion concentration of 1.5mol / L;

[0076] Slowly add 2.0mol / L NaOH solution and 1.5mol / L ammonia water into the above solution according to the volume ratio of 1:3, adjust the pH to 12, stir in a 40°C water bath until the precipitation is complete, and wash it with deionized water several times at the same time; Soak the obtained precipitate in absolute ethanol for 1.5h, and then dry the precipitate in a constant temperature vacuum box at 80°C for 14h to obtain the nickel cobalt lithium manganese oxide cathode material precursor Ni 0.6 co 0.2 mn 0.18 (OH) 2 .

[0077] Mix the precursor of nickel cobalt lithium manganese oxide positive electrode material and basic copper carbonate according to the...

Embodiment 3

[0084] Preparation of nickel cobalt lithium manganese oxide cathode material:

[0085] NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O is mixed and placed in a beaker according to the molar ratio of 0.6:0.2:0.14, and dissolved in deionized water to obtain a solution with a metal ion concentration of 2.0mol / L;

[0086] Slowly add 4.0mol / L NaOH solution to the above solution, adjust the pH to 11, stir in a 60°C water bath until the precipitation is complete, and wash it with deionized water several times at the same time; place the obtained precipitate in absolute ethanol for soaking 0.5h, and then put the precipitate in a constant temperature vacuum oven at 100°C and dry for 10h to obtain the nickel cobalt lithium manganese oxide cathode material precursor Ni 0.6 co 0.2 mn 0.14 (OH) 2 .

[0087] Mix the precursor of nickel cobalt lithium manganese oxide positive electrode material and basic copper carbonate according to the molar ratio of 1:0.06 for ball milling, then c...

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Abstract

The invention provides a nickel-cobalt lithium manganese oxide positive electrode material and a preparation method thereof, a lithium ion battery positive electrode slurry, a lithium ion battery positive electrode and a lithium ion battery. The preparation method of nickel-cobalt lithium manganese oxide cathode material comprises the following steps: mixing the nickel-cobalt lithium manganese oxide cathode material precursor and copper source, performing the first calcination, and then adding the lithium source for the second calcination to obtain nickel-cobalt lithium manganese oxide lithium Cathode material. The nickel-cobalt lithium manganese oxide cathode material is prepared by the preparation method. The positive electrode slurry for lithium ion batteries includes the nickel-cobalt lithium manganese oxide positive electrode material. The positive electrode of the lithium ion battery is prepared by using the positive electrode slurry of the lithium ion battery. A lithium-ion battery includes the positive electrode of the lithium-ion battery. The nickel cobalt lithium manganese oxide cathode material provided by the application is Cu 2+ The doped cathode material can effectively improve the structural stability and conductivity of the material itself, thereby improving the electrochemical performance of the cathode material such as rate performance and cycle performance.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a nickel-cobalt lithium manganese oxide positive electrode material and a preparation method thereof, a lithium ion battery positive electrode slurry, a lithium ion battery positive electrode and a lithium ion battery. Background technique [0002] As an environmentally friendly lithium secondary battery, lithium-ion batteries have been widely used in various electronic fields such as 3C and EV fields due to their high specific energy, high specific power, long cycle life, and good high and low temperature performance. Wait. With the continuous expansion of application fields, higher requirements are put forward for the energy density, rate performance and cycle performance of lithium-ion batteries. At present, the methods of improving energy density mainly include increasing the gram capacity of cathode materials, and gradually shifting from lithium iron phosphate to nickel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/505H01M4/525C01G53/00H01M10/0525
CPCC01G53/006H01M4/505H01M4/525H01M4/131H01M10/0525C01P2006/10C01P2006/40Y02E60/10
Inventor 伍成李文武周游王耐清
Owner SOUNDON NEW ENERGY TECH CO LTD
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