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Lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material and preparation method thereof

A lithium ion battery, lithium heteromanganate technology, applied in battery electrodes, chemical instruments and methods, secondary batteries, etc., can solve problems such as rate performance, poor cycle performance, high reaction energy consumption, and poor consistency of positive electrode materials.

Pending Publication Date: 2021-05-18
HUBEI UEE ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main shortcomings of existing cathode materials are poor rate performance and cycle performance, and insufficient specific capacity
The main shortcomings of the existing synthesis technology are high production cost, low production efficiency, poor consistency of synthetic materials, etc.
Such as high-temperature solid-state reaction with high energy consumption, long reaction time, and poor consistency of synthesizing positive electrode materials
The reaction yield of hydrothermal synthesis technology and rheological phase synthesis technology is low, and the production efficiency is low

Method used

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  • Lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material and preparation method thereof
  • Lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material and preparation method thereof
  • Lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material, the specific steps of its preparation are:

[0055] A. Mix, grind or ball mill 0.8 moles of manganese sulfate, 0.05 moles of cobalt acetate, 0.15 moles of nickel nitrate, 0.51 moles of LiOH, 0.01 moles of silver fluoride, and 1.1 moles of potassium peroxodisulfate to form a uniform reaction mixture, and transfer the mixture to a polymer In a stainless steel reactor lined with tetrafluoroethylene;

[0056] B, stirring, in 20g surfactant CTAB, add 250mL distilled water, 100mL surfactant auxiliary isoamyl alcohol, 150mL cyclohexane successively, make transparent or translucent microemulsion;

[0057] C. The microemulsion of step B is added to the reactor of step A, mixed evenly, sealed, placed in an oven at 95 ° C for 36 hours, and cooled;

[0058] D, take out the mixture after C step reaction, suction filter, filter solid with 500mL 95wt% alcohol washing once, then wash w...

Embodiment 2

[0061] A lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material, the specific steps of its preparation are:

[0062] A. 0.375 moles of manganese nitrate, 0.375 moles of manganese acetate, 0.1 moles of nickel sulfate, 0.1 moles of nickel acetate, 0.025 moles of cobalt nitrate, 0.025 moles of cobalt acetate, 0.135 moles of Li 2 O, 0.27 moles of lithium acetate, 0.01 moles of silver nitrate and 0.95 moles of sodium peroxodisulfate are mixed, fully ground or ball-milled into a reaction mixture, and the mixture is transferred to the stainless steel reactor lined with polytetrafluoroethylene;

[0063] B, stirring, to 18g of surfactant SDS, successively add 220mL of deionized water, 80mL of surfactant auxiliary n-butanol, 130mL of n-heptane to make the microemulsion transparent or translucent;

[0064] C. The microemulsion of step B is added to the reaction kettle of step A, mixed evenly, sealed, placed in an oven at 105 ° C for 32 hours of re...

Embodiment 3

[0068] A lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material, the specific steps of its preparation are:

[0069] A. Mix 0.3 moles of manganese sulfate, 0.3 moles of manganese acetate, 0.325 moles of nickel nitrate, 0.075 moles of cobalt acetate, 0.305 moles of lithium sulfate, 0.305 moles of lithium nitrate, 0.03 moles of silver nitrate and 1.0 moles of ammonium peroxodisulfate to form a reaction mixture, transfer the mixture to a stainless steel reaction kettle lined with teflon;

[0070] B. Stir, mix 16g of surfactant ABS with 200mL of distilled water, 60mL of surfactant auxiliary amyl alcohol, and 120mL of octane in turn to make a transparent or translucent microemulsion;

[0071] C. The microemulsion of step B is added to the reaction kettle of step A, mixed evenly, sealed, placed in an oven at 115° C. to react for 28 hours, and cooled;

[0072] D. Take out the mixture after the reaction in step C, filter, and rinse the filte...

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Abstract

The invention relates to the fields of lithium ion battery positive electrode materials, lithium ion batteries and the like, in particular to a lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material and a preparation method thereof. The preparation method comprises the following steps: A, mixing and fully grinding or ball-milling a manganese compound, a nickel compound, a cobalt compound, a lithium compound, a silver compound and an oxidizing agent into a reaction mixture, and transferring the reaction mixture into a reaction kettle; b, mixing a surfactant, organic alkane, a surfactant auxiliary agent and water to prepare a microemulsion; c, adding the microemulsion into a reaction kettle, fully mixing, sealing, and reacting in a drying oven; and D, slowly adding the mixture after the reaction in the step C into alcohol, stirring and filtering, washing the filtered substance with distilled water, and drying to obtain the product. According to the invention, the particle size is uniform, the particle size, the morphology, the doping amount of silver, cobalt and nickel and the like are easy to control, the material can be widely applied to manufacturing of various types of lithium ions and the like, and the method is simple in process, low in cost and easy for large-scale production.

Description

technical field [0001] The invention relates to the fields of lithium ion battery positive electrode materials, lithium ion batteries and the like, in particular to a lithium ion battery silver, cobalt and nickel doped lithium manganate positive electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are one of the most widely used batteries in modern human life. The manufacturing raw materials of lithium-ion batteries mainly include positive electrode active material (positive electrode material), negative electrode active material (negative electrode material), electrolyte, positive and negative electrode current collector, positive and negative electrode binder, conductive agent, etc. In the manufacturing cost of lithium ion batteries, the proportion of positive active materials is the highest, usually between 30 and 40%. It can be seen the importance of cathode materials to the manufacture of lithium-ion batteries. [00...

Claims

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Application Information

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IPC IPC(8): C01G45/12H01M4/505H01M4/525H01M4/54H01M10/0525B82Y30/00B82Y40/00
CPCC01G45/1242H01M4/505H01M4/525H01M4/54H01M10/0525B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2006/40C01P2006/11C01P2004/64C01P2004/32Y02E60/10
Inventor 赵双琪邓帮君周登伯李慧林定文胡远强丁先红张文博周环波
Owner HUBEI UEE ENERGY TECH CO LTD
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