Constant high temperature circulation NCM 523 (nickel cobalt manganese acid lithium) ternary material and preparation method thereof

A nickel-cobalt lithium manganese oxide, high-temperature cycle technology, applied to electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of small self-discharge, poor storage performance, fast decay of charge-discharge cycle capacity, etc., and achieve low cost , Large specific capacity, easy to scale production

Inactive Publication Date: 2014-03-26
兰州金里能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The positive electrode material nickel cobalt manganese oxide NCM523 ternary material for lithium-ion batteries has the advantages of high voltage platform, large specific c

Method used

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  • Constant high temperature circulation NCM 523 (nickel cobalt manganese acid lithium) ternary material and preparation method thereof
  • Constant high temperature circulation NCM 523 (nickel cobalt manganese acid lithium) ternary material and preparation method thereof
  • Constant high temperature circulation NCM 523 (nickel cobalt manganese acid lithium) ternary material and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0033] The precursor oxide (Ni 0.5 co 0.2 mn 0.3 ) 2 O, after sieving, aluminum hydroxide with an average particle size of 6 μm battery-grade lithium carbonate and an average particle size of 200 nm according to Li:Ni 0.5 co 0.2 mn 0.3 The molar ratio of :Al=1.02:1:0.02 is fully mixed by dry mixing.

[0034] The mixture obtained above was put into a sagger for compaction, heated at a constant temperature of 950° C. for 18 hours in an air atmosphere for roasting reaction, and naturally cooled for 10 hours after completion, the powder was taken out, pulverized, and sieved.

[0035] Put the powder obtained above into a sagger and smooth it, and heat it at a constant temperature of 810°C for 6 hours in the air atmosphere for sintering. After the completion, take out the powder and sieve it after natural cooling to obtain a long-term high-temperature cycle lithium cobalt manganese oxide NCM523 ternary Material Li 1.02 Ni 0.5 co 0.2 mn 0.3 al 0.02 o 2 . The specific sur...

example 2

[0038] The precursor oxide (Ni 0.5 co 0.2 mn 0.3 ) 2 O, after sieving, the aluminum oxide with an average particle size of 6 μm battery-grade lithium carbonate and an average particle size of 50 nm according to Li:Ni 0.5 co 0.2 mn 0.3 : Al = 1.05: 1: 0.05 molar ratio is fully mixed by dry mixing.

[0039] The mixture obtained above was put into a sagger for compaction, heated at a constant temperature of 930° C. for 15 hours in an air atmosphere for roasting reaction, and naturally cooled for 8 hours after completion, the powder was taken out, pulverized, and sieved.

[0040] Put the powder obtained above into a sagger and smooth it, heat it at a constant temperature of 830°C in an air atmosphere for 8 hours for roasting, and after it is naturally cooled, take out the powder and sieve it to obtain a long-term high-temperature cycle lithium cobalt manganese oxide NCM523 ternary Material Li 1.05 Ni 0.5 co 0.2 mn 0.3 al 0.05 o 2 . The specific surface area of ​​the n...

example 3

[0043] The precursor oxide (Ni 0.5 co 0.2 mn 0.3 ) 2 O, after sieving, aluminum nitrate with an average particle size of 6 μm battery-grade lithium carbonate and an average particle size of 1.8 μm according to Li:Ni 0.5 co 0.2 mn 0.3 :Al=1.08:1:0.08 The molar ratio is fully mixed by dry mixing.

[0044] The mixture obtained above was put into a sagger for compaction, heated at a constant temperature of 910° C. for 14 hours in an air atmosphere to carry out roasting reaction, and naturally cooled for 7 hours after completion, the powder was taken out, pulverized, and sieved.

[0045] Put the powder obtained above into a sagger and smooth it, heat it at a constant temperature of 850°C in the air atmosphere for 8 hours for roasting, and then take out the powder after natural cooling and sieve to obtain a long-term high-temperature cycle lithium cobalt manganese oxide NCM523 ternary Material Li 1.08 Ni 0.5 co 0.2 mn 0.3 al 0.08 o 2 . The specific surface area of ​​the...

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Abstract

The invention relates to a preparation method of a constant high temperature circulation NCM 523 (nickel cobalt manganese acid lithium) ternary material for a lithium ion battery. The chemical formula of the constant high temperature circulation NCM 523 ternary material is Li(1+x)Ni0.5Co0.2Mn0.3AlxO2, wherein x is 0.02-0.1. According to the method, aluminum salt and oxide thereof are added in material sintering, a dry process is adopted to uniformly mix, then sintering is performed, high-temperature performance of NCM 523 is increased by admixing Al ions, so that the problems of worse high-temperature cycle performance and high-temperature storage performance of nickel cobalt manganese acid lithium are effectively solved; as the dry-process is adopted to admix, prepared NCM 523 cathode material has the advantages of large specific capacity, good cycle performance, stable quality, low cost, simple preparation technology and little pollution, does not produce waste water, and is easy for industrialization.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials, and relates to a preparation method of a long-term high-temperature cycle nickel-cobalt-lithium manganese oxide NCM523 ternary material used for lithium-ion batteries. [0002] Background technique [0003] In order to gradually solve the energy shortage and air pollution problems that restrict the current economic development, lithium-ion batteries have the advantages of high working voltage, high energy density, long cycle life, less pollution, no memory effect, small size, light weight, and no environmental pollution. In recent years, it has achieved rapid development in technology, production and market, and has formed a large new industry. [0004] The positive electrode material nickel cobalt manganese oxide NCM523 ternary material for lithium-ion batteries has the advantages of high voltage platform, large specific capacity, good cycle performance at room tempe...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122H01M4/362H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 衡凯赵志兵王燕舞万国莉
Owner 兰州金里能源科技有限公司
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