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Preparation method of high-nickel ternary positive electrode material for lithium ion battery

A lithium-ion battery and cathode material technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve problems such as unfavorable production of high-nickel cathode materials, easy corrosion and cracking of coatings, etc., to improve product quality, reduce Corrosive, wear-reducing effect

Active Publication Date: 2021-10-01
宜宾锂宝新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of the ternary cathode material is under high alkali and high temperature conditions, and the ceramic lining is easy to crack under these conditions, especially under long-term high-temperature conditions, which is not suitable for long-term high-temperature sintering, and the coating is easy to corrode, which is not conducive to high-temperature sintering. Long-term stable production of nickel cathode materials

Method used

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  • Preparation method of high-nickel ternary positive electrode material for lithium ion battery
  • Preparation method of high-nickel ternary positive electrode material for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) 20kg NCA precursor Ni 0.87 co 0.1 al 0.03 (OH) 2 , 9.7kg lithium hydroxide, 100g TiO 2 Join in the high-speed stirring mixer, stir at 300rpm for 15min, then stir at 600rpm for 30min to obtain a high-mixture;

[0023] 2) Add the high-grade mixture into the rotary kiln at a uniform speed for pre-sintering. The sintering temperature is 600°C, the time is 6 hours, the atmosphere is pure oxygen, and the air flow is 500L / min to obtain pre-sintered materials with a bulk density of 1.6-1.8g / min. cm 3 ;

[0024] 3) The pre-sintered material is sintered once in a 10-meter atmosphere roller kiln, the amount of sagger is 7kg / bowl, the filling height is ≈4.5cm, the sintering temperature is 735°C, the time is 12h, and the sintering atmosphere is pure oxygen atmosphere , the oxygen ventilation rate is 1000L / min, and the primary sintered material is obtained, and the amount of discharging bowl is 6.5-6.6kg / bowl;

[0025] 4) Grind the primary sintered material, control D50 at ...

Embodiment 2

[0029] 1) 20kg NCA precursor Ni 0.87 co 0.1 al 0.03 (OH) 2 , 9.7kg lithium hydroxide, 100g TiO 2 Join in the high-speed stirring mixer, stir at 300rpm for 15min, then stir at 600rpm for 30min to obtain a high-mixture;

[0030] 2) Put the high-mixed material into the rotary kiln at a uniform speed for pre-sintering. The sintering temperature is 500°C, the time is 6 hours, the atmosphere is pure oxygen, and the air flow is 500L / min to obtain pre-sintered materials. cm 3 ;

[0031] 3) Sinter the pre-sintered material once in a 10-meter atmosphere roller kiln. The sagger filling capacity is 5.8-5.9kg / bowl, the filling height is ≈4.5cm, the temperature is 735°C, the time is 12h, and the sintering atmosphere is pure Oxygen atmosphere, the oxygen ventilation rate is 1000L / min, and the primary sintered material is obtained, and the amount of discharging material is 4.9-5.0kg / bowl;

[0032] 4) Grind the primary sintered material, control D50 at 13.0±2.0μm, control D90 at 24.0±2....

Embodiment 3

[0036] 1) 20kg NCA precursor Ni 0.87 co 0.1 Al 0.03 (OH) 2 , 9.7kg lithium hydroxide, 100g TiO 2 Join in the high-speed stirring mixer, stir at 300rpm for 15min, then stir at 600rpm for 30min to obtain a high-mixture;

[0037] 2) Put the high-grade mixture into the rotary kiln at a uniform speed for pre-sintering, the temperature is 450°C, the time is 3 hours, the atmosphere is pure oxygen, the air flow is 500L / min, and the pre-sintering material is obtained, the bulk density is 0.9-1.0g / cm 3 ;

[0038] 3) The pre-sintered material is sintered once in a 10-meter atmosphere roller kiln. The sagger capacity is 4.4kg / bowl, the filling height is ≈4.5cm, the temperature is 735°C, the time is 12h, and the sintering atmosphere is pure oxygen atmosphere. , the oxygen ventilation rate is 1000L / min, and the primary sintered material is obtained, and the amount of discharging material is 3.3-3.4kg / bowl;

[0039] 4) The primary sintered material is pulverized, and the D50 is control...

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Abstract

The invention discloses a preparation method of a high-nickel ternary positive electrode material for a lithium ion battery, which comprises the following steps: (1) pre-sintering the precursor of the high-nickel ternary positive electrode material and lithium salt using a rotary kiln, and The sintering temperature in the high temperature zone is 450-600°C, and the sintering time is 3-8h; (2) The pre-sintered material is sintered in a roller kiln; The secondary sintering is carried out in a roller kiln to obtain a high-nickel ternary positive electrode material, the temperature of the secondary sintering is 500-600° C., and the sintering time is 6-10 hours. In the present invention, the ternary cathode material precursor and lithium salt are evenly mixed and pre-sintered in a rotary kiln, and then loaded into a roller kiln for sintering, so that the production capacity of the roller kiln is increased by more than 100%; the precursor and lithium salt are pre-sintered The volatile components in the material are greatly reduced, the sintering atmosphere of the roller kiln is improved, and the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for preparing a high-nickel ternary positive electrode material for lithium-ion batteries. Background technique [0002] Lithium-ion battery (lithium secondary battery) is more and more favored by the battery industry for its advantages of light weight, long life, clean and environmental protection. As the key material of lithium-ion battery, the positive electrode material has always been the focus of research and development in the industry. At present, the mainstream positive electrode materials of lithium-ion batteries include lithium cobalt oxide, lithium iron phosphate, lithium manganese oxide, and nickel-cobalt-manganese ternary materials, and there are NCA (nickel-cobalt-aluminum) series, LOL (lithium-rich manganese solid solution) and other emerging materials. Materials have been added to it and have been widely used commercially. Among them, nic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505C01G53/00H01M4/485H01M4/525H01M10/0525
CPCC01G53/44C01P2006/40H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 邹昌武范未峰吴江孙玖景旺旺颜华张彬
Owner 宜宾锂宝新材料有限公司
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