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Wet-method preparation process of ternary positive material for lithium ion battery

A lithium-ion battery, cathode material technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of long production cycle, low charge-discharge efficiency and cycle life, large material particles, etc. Synchronization, the effect of improving reactivity

Active Publication Date: 2013-06-12
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the ternary materials currently on the market are produced by the solid-state method. The obtained materials have large particles, are easy to agglomerate, and have low charge-discharge efficiency and cycle life. The production cycle is long and cannot meet the market demand for high performance. Requirements for the use of secondary batteries

Method used

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  • Wet-method preparation process of ternary positive material for lithium ion battery
  • Wet-method preparation process of ternary positive material for lithium ion battery
  • Wet-method preparation process of ternary positive material for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare nickel-cobalt-manganese ternary cathode material according to the following steps

[0029] (1) Preparation of ternary precursor

[0030]In the reaction kettle of the bottom liquid dissolved with ammonia water, nitrogen or argon gas was passed in advance for 60 minutes, and then the nickel, cobalt, and manganese nitrates weighed according to the molar ratio of 5:2:3 were dissolved in the solution, and the total molar concentration of metal ions was Control it at 2mol / L, use 1mol / L sodium hydroxide solution to adjust the pH value of the liquid in the kettle between 8-11, and continue the reaction for 20 hours; after the reaction, carry out solid-liquid separation, and finally obtain the nickel hydroxide cobalt manganese precursor body.

[0031] (2) Synthesis of ternary materials

[0032] Weigh the ternary precursor nickel cobalt manganese hydroxide and lithium salt according to the ratio of 1:1.1, use ball milling equipment to control the particle size and preli...

Embodiment 2

[0039] Weigh the ternary precursor nickel cobalt manganese hydroxide and lithium salt in a ratio of 1:1.02, use ball milling equipment to control the particle size and mix them initially, add the material to the mixer after discharging, and weigh the corresponding mass dispersant according to the mass ratio Add and stir. After continuous stirring for 2 hours, the particle size is controlled by slurry crushing equipment, and the mixed material is dried instantly in a rapid drying equipment at 150°C to ensure the uniformity of material distribution in a wet environment. Spread the dry material obtained above in a sagger, and control the thickness of the material at 1.2 cm. Then, the muffle furnace was used to keep the temperature at 500° C. for 7 hours to obtain the front-stage sintered material of the ternary positive electrode material. After the above-mentioned sintered material is cooled, weigh the material quality, introduce the lithium salt for the second time at a ratio ...

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Abstract

The invention provides a wet-method preparation process of a ternary positive material for a lithium ion battery. The synthesis process of a ternary precursor comprises the steps of: adding complexing agent ammonia water, an aqueous solution of metal nickel-cobalt-manganese ions, and a precipitating agent aqueous solution of sodium hydroxide into a reaction kettle to prepare the liquid-phase ternary precursor under the condition of protection gas; and the synthesis process of the ternary material comprises the steps of: carrying out preliminary-stage sintering in a muffle furnace after ball grinding, mixing, smashing and fast drying the ternary precursor and lithium salt, secondarily introducing of the lithium salt into the materials according to a proportion after the preliminary-stage sintering, and carrying out secondary sintering in the muffle furnace after mixing the materials, so as to obtain the nickel-cobalt-manganese acid lithium ternary positive material. The method provided by the invention is simple in preparation process, the particle size of the prepared nickel-cobalt-manganese acid lithium ternary positive material ranges from 0.5 to 10 microns, the prepared nickel-cobalt-manganese acid lithium ternary positive material is controllable and can be uniformly distributed, and the nickel-cobalt-manganese acid lithium ternary positive material has an excellent electrochemical performance.

Description

technical field [0001] The invention relates to the preparation of a lithium-ion battery ternary cathode material, in particular to a wet preparation process for the lithium-ion battery ternary cathode material. Background technique [0002] The contradiction between the increasing shortage of global resources and the continuous deterioration of the environment, and the increasing demand for energy has always been a key issue in the sustainable development of the world economy. The exploration and development of alternative secondary energy is also an important national policy of every country. Compared with nickel-cadmium and lead-acid batteries, lithium-ion batteries have the characteristics of high capacity, good cycle performance, and less environmental pollution. They are more in line with the concept of clean energy batteries in the new century, so they have unprecedented development in the world. [0003] As an important part of lithium-ion batteries, positive electro...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 孟博杜显振关成善宗继月
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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