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Coating method of porous clad material for effectively improving rate performance of lithium nickel cobalt manganese oxygen

A lithium-nickel-cobalt-manganese-oxygen, rate performance technology, applied in the field of material chemistry, can solve problems such as not very obvious effects, and achieve the effects of facilitating transfer and charge transfer, easy process control, and simple operation

Active Publication Date: 2009-05-20
山东天骄新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jang et al. [Electrochimica Acta, 50 (2005) 4168] used precipitation method in LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Coated with a layer of Al(OH) 3 , the capacity retention rates of the material and the uncoated material after 45 cycles at 1 / 8C are 96% and 92%, respectively. The effect is not obvious, but the high rate performance has been significantly improved. 80% compared to only 45% uncoated

Method used

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  • Coating method of porous clad material for effectively improving rate performance of lithium nickel cobalt manganese oxygen
  • Coating method of porous clad material for effectively improving rate performance of lithium nickel cobalt manganese oxygen
  • Coating method of porous clad material for effectively improving rate performance of lithium nickel cobalt manganese oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First accurately weigh 0.051g NH 4 HF 2 , prepare 0.005mol / L of NH 4 HF 2 solution. Weigh 3.0g matrix material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 and 0.200g Al(NO 3 ) 3 12H 2 O was put into a 500ml beaker, added 100ml of twice-distilled water, and stirred fully on a magnetic stirrer for 10min. At a stirring speed of 300r / min and a temperature of 45°C, the substrate material and Al(NO 3 ) 3 12H 2 Add the prepared NH dropwise to the mixed solution of O 4 HF 2 solution (F / Al molar ratio about 3.8). After the precipitation is complete, let the turbid solution stand for 2 to 3 hours. After vacuum filtration, the obtained precipitate was dried in a blast oven at 110°C for 3 hours to obtain a powder. The powder was calcined in a muffle furnace at 250°C for 3h under an argon atmosphere, and then calcined at 600°C for 6h. Coated AlF 3 target material. For a comparison of its structures, see figure 1 . Depend on figure 1 It can be seen that the X-ray diffraction pa...

Embodiment 2

[0039] Accurately weigh 0.060g NH 4 HF 2 , prepare 0.005mol / L of NH 4 HF 2 solution. Weigh 3.0g matrix material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 and 0.200g Al(NO 3 ) 3 12H 2 O was put into a 500ml beaker, added 100ml of twice-distilled water, and stirred fully on a magnetic stirrer for 10min. At a stirring speed of 300r / min and a temperature of 45°C, the substrate material and Al(NO 3 ) 3 12H 2 Add the prepared NH dropwise to the mixed solution of O 4 HF 2 solution (F / Al molar ratio about 4.5). Other steps are the same as in Example 1.

Embodiment 3

[0041] Accurately weigh 0.079g NH 4 HF 2 , prepare 0.005mol / L of NH 4 HF 2 solution. Weigh 3.0g matrix material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 and 0.200g Al(NO 3 ) 3 12H 2 O was put into a 500ml beaker, added 100ml of twice-distilled water, and stirred fully on a magnetic stirrer for 10min. At a stirring speed of 300r / min and a temperature of 45°C, the substrate material and Al(NO 3 ) 3 12H 2 Add the prepared NH dropwise to the mixed solution of O 4 HF 2 solution (F / Al molar ratio about 6.0). Other steps are the same as in Example 1.

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Abstract

The invention discloses a packing method for multiaperture packing material for improving multiplying power performance of lithium nickel cobalt manganese oxygen, which is characterized in that the method comprises following steps: (1) soluble aluminum salt solution of corresponding matter mass is prepared according to Al / LiNi1 / 3Co1 / 3Mn1 / 3O2 moore ratio of 0.5 percent to 3.0 percent, added into the water solution of anode material LiNi1 / 3Co1 / 3Mn1 / 3O2, stirred and mixed evenly; (2) ammonium hydrogen fluoride solution of corresponding matter mass is prepared according to F / Al moore ratio of 3 to 6 and dipped into the solution in (1), stirred and mixed evenly until final reaction; (3) the solution of (2) is arranged statically for 2h to 5h, filtered by vacuum, dried the deposit and put into muffle to bake, the air in the stove is argon (can be nitrogen) and the anode material active matter power packed with multiaperture AlF3 film under the calcinations temperature of 200 DEG C to 650 DEG C.

Description

technical field [0001] The invention relates to the field of material chemistry and high-energy battery material technology, in particular to a novel lithium-ion battery cathode material lithium nickel cobalt manganese oxide (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ) The coating method of the porous coating material. Background technique: [0002] Lithium-ion batteries have the advantages of small size, light weight, large specific capacity, long cycle life, small self-discharge, and no memory effect. At present, it has been widely used in portable mobile tools, digital products, artificial satellites, aerospace and other fields, and has very broad prospects in the fields of electric bicycles and automobiles. LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 It combines the advantages of lithium cobalt oxygen, lithium nickel oxygen, and lithium manganese oxygen, and makes up for their respective shortcomings to a certain extent. It has the characteristics of high specific capacity, stable cycle perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/04B22F1/02
CPCY02E60/12Y02E60/10
Inventor 唐爱东王海燕黄可龙
Owner 山东天骄新能源有限公司