Green low-cost ternary precursor material, and preparation method and device thereof

A technology of ternary materials and precursors, applied in chemical instruments and methods, electrical components, inorganic chemistry, etc., can solve problems such as investigations that do not involve the content of ternary elements, increased waste liquid treatment costs, and environmental pollution.

Inactive Publication Date: 2020-10-20
ENERGY RES INST OF SHANDONG ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor found that although the latest preparation method of the ternary precursor can overcome the problem of wide particle size prepared by the traditional continuous co-precipitation method, the operation process is complicated and needs to be matched with some other equipment such as aging tanks, ionizers, and enrichment. Machines and other equipment, the use of ammonia as a complexing agent in the synthesis process will lead to NH 3 release and a large amount of alkaline supernatant, causing environmental pollution and increasing the cost of waste liquid treatment and did not involve the investigation of the content of three elements in the precursor material

Method used

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  • Green low-cost ternary precursor material, and preparation method and device thereof
  • Green low-cost ternary precursor material, and preparation method and device thereof
  • Green low-cost ternary precursor material, and preparation method and device thereof

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preparation example Construction

[0023] A green and low-cost ternary material precursor preparation method, the preparation method is as follows: nickel salt, manganese salt, and cobalt salt are formulated into a certain concentration of mixed salt solution according to a certain stoichiometric ratio, and a certain concentration of environmentally friendly The complexing agent and precipitating agent are fed into the N-filled 2 In the protected reaction tank, the hydrodynamic conditions such as concentration, reaction temperature, and stirring rate during the reaction process are strictly controlled, and the feed rate of the precipitant is controlled by a pH automatic dosing machine to maintain pH stability during the reaction; after a period of reaction , the product is pumped into the circulation tank through the bottom of the reaction tank. After the reaction liquid is filled with the circulation tank, it enters the reaction tank again from the overflow port, and the cycle is repeated several times; diamet...

Embodiment 1

[0034] Weigh a certain amount of Ni (NO 3 ) 2 , Co(NO 3 ) 2 and Mn(NO 3 ) 2 Dissolve in deionized water to make a 0.1mol / L mixed salt solution, and flow it into a 1L reactor with 0.1mol / L sodium citrate solution, the reaction temperature is 30°C, the feed rate is controlled at 1ml / min, and the stirring intensity is 300r / min, the precipitating agent NaOH (0.2mol / L) adopts the pH automatic dosing machine to adjust and adjust the pH=10 in the reaction process. After the reaction solution stays in the reaction tank for 0.5 hours, the product is pumped into the circulation tank together with the reaction solution, and then overflows back to the reaction tank. After stirring for 5 hours, the final product was filtered, washed with water and dried to obtain Ni 0.5 co 0.2 mn 0.3 (OH) 2 precursor material.

Embodiment 2

[0036] Weigh a certain amount of NiC with Ni, Co, and Mn in a molar ratio of 0.6:0.2:0.2 2 o 4 、Co C 2 o 4 and MnC 2 o 4 Dissolve in deionized water to form a 10mol / L mixed salt solution, and flow it into the reactor with a 10mol / L polyacrylic acid solution. The reaction temperature is 50°C, the feed rate is controlled at 10ml / min, and the stirring intensity is 500r / min. Agent Na 2 CO 3 (10mol / L) pH=10.5 during the reaction process is regulated and adjusted by a pH automatic liquid dosing machine. After the reaction liquid stays in the reaction tank for 1 hour, the product is pumped into the circulation tank through the bottom of the reaction tank, and the reaction liquid naturally overflows into the reaction tank when it is filled with the circulation tank. After stirring and reacting for 20 hours, the final product is filtered and washed with water. and after drying to obtain Ni 0.6 co 0.2 mn 0.2 CO 3 precursor material.

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Abstract

The invention relates to a green low-cost ternary precursor material, and a preparation method and device thereof, belonging to the field of new energy power batteries. The method comprises the following steps: a mixed salt solution with a certain concentration is prepared from a nickel salt, a manganese salt and a cobalt salt; the mixed salt solution, an environment-friendly complexing agent witha certain concentration and a precipitant are simultaneously fed into a reaction tank filled with N2, reaction conditions are strictly controlled, and the feeding rate of the precipitant is controlled by an automatic pH liquid feeder; a formed product is pumped into a circulating tank from the bottom of the reaction tank and enters the reaction tank again from an overflow port after the circulating tank is filled with reaction liquid, and such a cycle is repeated multiple times; a reaction is stopped after the particle size of precursor particles meet a requirement; and filtering, washing anddrying are conducted to obtain the ternary precursor material. The method adopted by the invention overcomes the defect of wide particle size distribution in a traditional process; a precursor prepared by the invention has the advantages of qualified content of each metal, reasonable particle size distribution and high sphericity degree; and the method is simple in process, friendly to environment, low in energy consumption and suitable for industrial popularization.

Description

technical field [0001] The invention belongs to a lithium-ion battery ternary material precursor, a preparation method and a device thereof, and belongs to the field of new energy power batteries. Specifically, it relates to a method for preparing a green and low-cost ternary material precursor. Background technique [0002] Currently, ternary materials (LiNi x co y mn 1-x-y o 2 ) especially high-nickel ternary materials ((LiNi x co y mn 1-x-y o 2 ,x>0.6) as the positive electrode power battery has become the first choice of many domestic battery companies. LiNi x co y mn 1-x-y o 2 The material can be divided into 111, 523, 622, and 811 types according to the ratio of Ni:Co:Mn three elements. Ni as the main active element can increase the specific capacity, Co can increase the electrical conductivity, and Mn can stabilize the material structure. The increase of Ni content increases the capacity of the material. , but the rate performance, cycle life and safet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCC01G53/006H01M4/505H01M4/525C01P2004/03C01P2006/40C01P2006/11C01P2004/61Y02E60/10
Inventor 秦显忠蔡飞鹏王波蒋波姜桂林
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI
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