Preparation method of lithium ion battery cathode material

A technology for lithium ion batteries and positive electrode materials, which is applied in the field of preparation of positive electrode materials for lithium ion batteries, can solve the problems of high production process requirements, complicated operations and the like, and achieves the effects of low cost, simple operation and good electrochemical performance.

Inactive Publication Date: 2020-04-28
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently synthesized LiNi 0.8 co 0.1 mn 0.1 o 2 Most of the preparation methods of positive electrode materials are to use sulfate as the raw material first, and then use the co-precipitation method to obtain the hydroxide precursor and then mix and calcinate it with the lithium source. During the preparation of the precursor, it is necessary to control the pH value, rotation speed, temperature and The drop rate of the solution and other factors, the operation is complicated, and the requirements for the production process are relatively high

Method used

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  • Preparation method of lithium ion battery cathode material
  • Preparation method of lithium ion battery cathode material
  • Preparation method of lithium ion battery cathode material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Weigh 2.9814g, 0.4901g, and 0.4981g of nickel acetate, cobalt acetate, and manganese acetate into a beaker, add 1g of CTAB into the beaker, then add 65mL of deionized water, stir at room temperature to dissolve the solid, and then add 2.5225g of urea for stirring until dissolved, transferred to the reaction kettle and heated at 200°C for 12 hours in a blast drying oven, then took it out, poured off the upper layer solution, washed the lower layer sediment with alcohol, centrifuged five times, and suction filtered three times with deionized water, then Transfer to a Petri dish and vacuum dry at 80°C for 12 hours to obtain Ni 0.8 co 0.1 mn 0.1 CO 3 Precursor powder. Weigh 1g of precursor powder and 0.3318g of lithium carbonate, mix and grind them thoroughly, and then calcinate in stages in a tube furnace under an oxygen atmosphere. Carry out the second calcination, the temperature is 800°C, the heating rate is 3°C / min, and the time is 12 hours, then LiNi is obtained. ...

Embodiment 2

[0018] Weigh 2.9814g, 0.4901g, and 0.4981g of nickel acetate, cobalt acetate, and manganese acetate into a beaker, add 1.5g of CTAB into the beaker, and then add 65mL of deionized water, stir at room temperature to dissolve the solid, and then add 2.5225g of urea to carry out Stir until dissolved, transfer to the reaction kettle, heat in a blast drying oven at 200°C for 12 hours, take it out, pour off the upper solution, wash the lower sediment with alcohol, centrifuge five times, and filter three times with deionized water. Then transfer to a Petri dish and vacuum dry at 80°C for 12 hours to obtain the precursor powder Ni 0.8 co 0.1 mn 0.1 CO 3 . Weigh 1g of precursor powder and 0.3318g of lithium carbonate, mix and grind them thoroughly, and then calcinate in stages in a tube furnace under an oxygen atmosphere. Carry out the second calcination, the temperature is 800°C, the heating rate is 3°C / min, and the time is 12 hours, then LiNi is obtained. 0.8 co 0.1 mn 0.1 o ...

Embodiment 3

[0020] Weigh 2.9814g, 0.4901g, and 0.4981g of nickel acetate, cobalt acetate, and manganese acetate into a beaker, add 2g of CTAB into the beaker, then add 65mL of deionized water, stir at room temperature to dissolve the solid, and then add 2.5225g of urea for stirring until dissolved, transferred to the reaction kettle and heated at 200°C for 12 hours in a blast drying oven, then took it out, poured off the upper layer solution, washed the lower layer sediment with alcohol, centrifuged five times, and then suction filtered three times with deionized water, Then transfer to a Petri dish and vacuum dry at 80°C for 12 hours to obtain the precursor powder Ni 0.8 co 0.1 mn 0.1 CO 3 . Weigh 1g of precursor powder and 0.3318g of lithium carbonate, mix and grind them thoroughly, and then calcinate in stages in a tube furnace under an oxygen atmosphere. Carry out the second calcination, the temperature is 800°C, the heating rate is 3°C / min, and the time is 12 hours, then LiNi is ...

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Abstract

The invention discloses a preparation method of a lithium ion battery positive electrode material. According to the preparation method disclosed by the invention, the LiNi0.8Co0.1Mn0.1O2 nanoparticlesare synthesized by adopting a simple hydrothermal-calcining two-step method; when a precursor is prepared by using a hydrothermal synthesis method, a surfactant cetyltrimethylammonium bromide (CTAB)is added to achieve the effects of increasing the nucleation rate of crystals and refining crystal particles, and ammonia gas released by urea decomposition is used for providing an alkaline environment for a reaction solution; and in the lithium mixing and calcining stage, two-stage sintering is carried out, so that secondary recrystallization is facilitated. The method is simple to operate and low in cost; the condition that the technological factors such as the pH and the stirring speed of the solution needs to be controlled when the precursor is prepared by a coprecipitation method is avoided, good conditions are provided for further modification research of the high-nickel ternary cathode material, the diameter of spherical particles of the prepared lithium ion battery cathode material ranges from 100 nm to 300 nm, the structural stability is good, and the electrochemical performance is good.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a preparation method of a positive electrode material of a lithium ion battery. Background technique [0002] High-nickel ternary materials have become the mainstream cathode materials for lithium-ion batteries. The ternary materials combine the good cycle performance of lithium cobalt oxide, the high specific capacity of lithium nickel oxide, and the high safety of lithium manganate. One of the new cathode materials for lithium-ion batteries with development prospects. Especially LiNi 0.8 co 0.1 mn 0.1 o 2 Type cathode materials have been found to have great advantages of high specific capacity, energy density and low cost, and have occupied a large market, becoming the focus of people's research. Currently synthesized LiNi 0.8 co 0.1 mn 0.1 o 2 Most of the preparation methods of positive electrode materials are to use sulfate as the raw material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525B82Y30/00B82Y40/00H01M4/02
CPCB82Y30/00B82Y40/00C01G53/50C01P2004/03C01P2004/32C01P2004/62C01P2004/64H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 邹正光刘杰
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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