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

A lithium-ion battery and lithium heteromanganate technology, which is applied in the field of nickel-cobalt-doped lithium manganate cathode material and its preparation for lithium-ion batteries, can solve the problems of poor consistency of cathode materials, high reaction energy consumption, and low production efficiency

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 that the actual specific capacity is not high enough, the rate performance, and the cycle performance are poor.
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
Low hydrothermal reaction yield, low production efficiency, etc.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052]A lithium ion battery nickel-cobalt doping with amylated positive electrode material, the specific steps of its preparation are:

[0053]A, 0.8 mole of manganese sulfate, 0.15 mole nickel, 0.05 mole of cobalt, 1.02 mole LiOH, 0.25 mole to potassium sulfate mix, ground or ball milling is formed into a reaction mixture, transfer mixture to the polytetrafluoroethylene liner. Stainless steel reactor;

[0054]B, stir, to 20 g of surfactant CTAB, 250 ml of distilled water, 100 mL surfactant aid isopentyl alcohol, 150 ml of cyclohexane, is made into transparent or translucent microemulsion;

[0055]C, add the microemulsion of the B step to the reaction kettle of the A step, mix uniform, sealed, and reacted in an oven at 55 ° C for 12 hours, cooling;

[0056]D, remove the mixture after the C step reaction, filtrate, and filter the solid with 500 ml of 95 wt% alcohol was washed once, then washed with distilled water to detect the sulfate, dried 65 ° C, i.e., lithium-cobalt-doped manganese acid Pos...

Embodiment 2

[0059]A lithium ion battery nickel-cobalt doping with amylated positive electrode material, the specific steps of its preparation are:

[0060]A, 0.4 mole nitrate, 0.4 manganese acid manganese, 0.075 mole sulfate, 0.075 mole acetate, 0.025 mole nitrite, 0.025 mole of cobalt, 0.255 mole Li2O, 0.52 lithium acetate and 0.35 molar sodium sulfate mixture, sufficiently polished or balls into reaction mixture, transfer mixture to the stainless steel reactor of the polytetrafluoroethylene liner;

[0061]B, stir, in 18 g of surfactant SDS, 220 mL of deionized water, 80 mL of surfactant censoon n-butanol, 130 ml of n-heptane, and made microemulsion transparent or translucent;

[0062]C, add the microemulsion of the B step to the reaction kettle of the A step, mix uniform, sealed, and reacted in an oven at 60 ° C for 16 hours, cooling;

[0063]D, remove the mixture after the C step reaction, filtrate, and filter solid was washed with 600 ml of no water, then washed with distilled water to detect the sulfu...

Embodiment 3

[0066]A lithium ion battery nickel-cobalt doping with amylated positive electrode material, the specific steps of its preparation are:

[0067]A, 0.35 mole of manganese, 0.35 acetate, 0.2 mole nickel nickel nickel, 0.1 mole acetate, 0.25 moles of lithium sulfate, 0.54 moles of lithium nitrate, and 0.45 mole of ammonium sulfate is mixed sufficiently polished or ball mills to reactive mixture, transfer mixture transfer In the stainless steel reactor of the polytetrafluoroethylene liner;

[0068]B, stir, 16 g of surfactant ABS, in turn with 200 ml of distilled water, 60 mL surfactant aid pentanol, 120 ml of octane, is made into a transparent or translucent microemulsion;

[0069]C, add the microemulsion of the B step to the reaction kettle of the A step, mix uniform, sealed, and reacted in an oven at 65 ° C for 20 hours, cooling;

[0070]D. Remove the mixture after the C step reaction, filtrate, filter solids 800ml, 95% alcohol eluting, then washed with distilled water to detect the sulfuric acid,...

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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 nickel-cobalt-doped lithium manganate positive electrode material and a preparation method thereof. The method comprises the following steps: A, mixing and grinding or ball-milling 0.5-0.8 mol of a manganese compound, 0.15-0.35 mol of a nickel compound, 0.05-0.15 mol of a cobalt compound, 0.55-0.6 mol of a lithium compound and 0.95-1.2 mol of an oxidizing agent into a reaction mixture, and transferring the obtained reaction mixture into a reaction kettle; B, mixing 12 to 20 g of a surfactant, 180 to 250 mL of water, 50 to 100 mL of a surfactant auxiliary agent and 100 to 150 mL of alkane to prepare a microemulsion; c, adding the microemulsion into the reaction kettle, mixing, sealing, reacting, and naturally cooling; and D, taking out the mixture, filtering, washing, and drying to obtain the product. According to the invention, a micro-emulsion hydrothermal liquid-solid mixed phase synthesis technology is adopted, so that the composition, the particle size and the morphology of the synthetic material are well controlled, and the synthesis efficiency of the material is remarkably improved.

Description

Technical field[0001]The present invention relates to a lithium-ion battery positive electrode material, a lithium ion battery, and the like, and more particularly to a lithium ion battery nickel-cobalt doping with amylated 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 material of the lithium-ion battery mainly has a positive active material (positive electrode material), an anode active material (anode material), an electrolytic solution, and a positive and negative electrode fluid, a positive and negative adhesive, a conductive agent, and the like. In the manufacturing cost of the lithium ion battery, the proportion of the positive electrode active material is the highest, usually accounts for 30 to 40% of the manufacturing cost of the battery. It can be seen that the importance of the positive electrode material on the manufacture of lithium ion batte...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y40/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/50B82Y40/00H01M4/505H01M4/525H01M10/0525C01P2006/40C01P2004/62C01P2004/61C01P2004/64Y02E60/10
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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