Preparation method and application of Ni0.8Co0.1Mn0.1(OH)2 material with high tap density

A technology of tap density and positive electrode materials, which is applied in the field of lithium-ion battery materials, can solve the problems of low tap density and poor sphericity, and achieve the effect of uniform particle size distribution and excellent cycle performance

Active Publication Date: 2019-04-26
ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
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Problems solved by technology

[0006] In order to improve the poor sphericity and low tap density of the 811 type ternary cathode material precursor material, the present invention proposes a high tap density Ni 0.8 co 0.1 mn 0.1 (OH) 2 The preparation method of the material, the Ni produced by this method 0.8 co 0.1 mn 0.1 (OH) 2 Materials and their applications

Method used

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  • Preparation method and application of Ni0.8Co0.1Mn0.1(OH)2 material with high tap density
  • Preparation method and application of Ni0.8Co0.1Mn0.1(OH)2 material with high tap density
  • Preparation method and application of Ni0.8Co0.1Mn0.1(OH)2 material with high tap density

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Embodiment 1

[0023] The Ni of embodiment 1 high tap density 0.8 co 0.1 mn 0.1 (OH) 2 material preparation

[0024] Nickel sulfate, cobalt sulfate, and manganese sulfate are prepared into a solution a with a concentration of 2mol / L in a molar ratio of 8:1:1, and industrial concentrated ammonia is diluted into a solution b with a concentration of 4mol / L. Dilute to a solution c with a concentration of 5 mol / L, and prepare a solution d of 3 mol / L with sodium hydroxide; dissolve an appropriate amount of ascorbic acid in water to form a solution e. Then solution b and solution e were successively poured into a 25L reactor as the bottom liquid, the stirring rate was set at 200r / min, and the temperature of the reactor was set at 60°C. Nitrogen was passed into the reactor as a protective gas, and the flow rate of nitrogen was set at 100mL / min. When the temperature rises to the set temperature, increase the stirring rate to 800r / min, and start pumping solution a, the addition rate is set to 3mL...

Embodiment 1I

[0028] Table 1 Embodiment 1ICP test

[0029]

[0030] image 3 It is the SEM picture of the sample of Example 1. Obviously, the sphericity of the sample in the example is very high, the uniformity is good, and the particle size is basically about 10 microns. Tap density up to 2.29g / cm 3 After mixing the lithium source, the electrochemical performance of the high-nickel ternary cathode material is as follows: Figure 5 Shown: The discharge specific capacity at 0.1C is as high as 203.6.mAh g -1 , the first Coulombic efficiency is as high as 89.70%, and the capacity retention rate after 500 cycles under 3.0-4.2V, 1C / 1C charge-discharge system is 95%, and the cycle performance is excellent.

Embodiment 2

[0031] Ni of embodiment 2 high tap density 0.8 co 0.1 mn 0.1 (OH) 2 material preparation

[0032] Nickel sulfate, cobalt sulfate, and manganese sulfate are prepared into a solution a with a concentration of 2mol / L in a molar ratio of 8:1:1, and industrial concentrated ammonia is diluted into a solution b with a concentration of 5mol / L. Dilute to a solution c with a concentration of 7mol / L, and prepare a solution d of 3mol / L with sodium hydroxide; dissolve an appropriate amount of ascorbic acid in water to form a solution e. Then solution b and solution e were successively poured into a 25L reactor as the bottom liquid, the stirring rate was set at 200r / min, and the temperature of the reactor was set at 50°C. Nitrogen was passed into the reactor as a protective gas, and the flow rate of nitrogen was set at 100mL / min. When the temperature rises to the set temperature, increase the stirring rate to 800r / min, and start pumping solution a, the addition rate is set to 3mL / min; ...

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Abstract

The invention provides a preparation method of a Ni0.8Co0.1Mn0.1(OH)2 material with high tap density. The method comprises specific implementation steps as follows: a solution a with concentration being 2 mol/L is prepared from nickel sulfate, cobalt sulfate and manganese sulfate in a mole ratio being 8:1:1, stronger ammonia water is diluted into a solution b with concentration being 3-5 mol/L, stronger ammonia water is diluted into a solution c with concentration being 5-8 mol/L, and a solution d with concentration being 3 mol/L is prepared from sodium hydroxide; ascorbic acid is dissolved inwater, and a solution e is formed; the solution b and the solution e are poured into a 20 L reaction kettle successively to serve as a base solution; nitrogen is introduced into the reaction kettle to serve as protective gas; temperature is set at 55 DEG C, stirring rate is set at 800 r/min, and pH is controlled to be 10-11; a crude Ni0.8Co0.1Mn0.1(OH)2 material is obtained after the reaction isperformed for 50 h; the crude product is subjected to heat treatment in a controlled atmosphere furnace, and the Ni0.8Co0.1Mn0.1(OH)2 material with the high tap density is obtained. The process is simple, safe and low in cost, and the obtained Ni0.8Co0.1Mn0.1(OH)2 precursor material is uniform in particle distribution, has excellent microstructure and has better electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery materials, in particular to a high tap density Ni 0.8 co 0.1 mn 0.1 (OH) 2 The preparation method of the material, the Ni produced by this method 0.8 co 0.1 mn 0.1 (OH) 2 Materials and their applications. Background technique [0002] The increasingly serious environmental pollution problem forces people to abandon the use of the three traditional fossil fuels. The fossil fuels consumed by cars every year are just incalculable, and what is even more frightening is that the number of cars is still increasing every year. The emergence of lithium-ion batteries will reverse this situation. New energy vehicles using lithium-ion batteries are being sought after by people. The quality of the energy storage equipment of new energy vehicles will directly affect its battery life. [0003] At present, the energy storage devices of new energy vehicles use lithium-ion batteries. Lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525C01G53/006C01P2002/72C01P2004/03C01P2006/11C01P2006/40Y02E60/10
Inventor 张中彩毛秦钟钱志挺吉同棕王鑫王寅峰吴海军
Owner ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
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