Preparation method of spinel type lithium manganese oxide for spherical high-voltage anode material

A cathode material, lithium nickel manganese oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low product purity, batch stability particle morphology and size are difficult to control, uneven mixing, etc. The synthesis process is simple, suitable for industrial production, and the uniformity is good.

Active Publication Date: 2012-07-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-cost, simple process and capacity and capacity for the problems of uneven mixing, low product purity, batch stability, and difficult control of particle shape and size in the above synthesis method. The preparation method of high-voltage cathode material whose cycle performance meets the requirements of lithium-ion power batteries, under the premise of ensuring high-rate discharge and high cycle stability, obtains a spinel lithium nickel manganese oxide cathode material with a discharge platform of about 4.7V

Method used

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  • Preparation method of spinel type lithium manganese oxide for spherical high-voltage anode material
  • Preparation method of spinel type lithium manganese oxide for spherical high-voltage anode material
  • Preparation method of spinel type lithium manganese oxide for spherical high-voltage anode material

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Embodiment 1

[0028] Take by weighing 4.53g manganese sulfate, 2.106g nickel sulfate, 0.234g cobalt sulfate, add deionized water to be configured into a 1mol / L solution; in addition weigh 5.4g sodium carbonate, dissolve in deionized water to form a 1mol / L solution; then Under the condition of stirring, the sodium carbonate solution was slowly dripped into the solution of the above mixed metal ions, then weighed 0.544g sodium dodecylsulfonate, added it in batches to the above mixed solution, stirred at room temperature for 3 After one hour, after adjusting the pH value to 8, it was transferred to the hydrothermal reaction kettle of 100mL polytetrafluoroethylene, and reacted for 10 hours at 120°C; centrifuged, and the filter cake was washed 5 times with deionized water, and the After drying in air at 100°C for 12 hours, 5.10 g of carbonate precipitates were obtained.

[0029] Weighed 2.22 g of the carbonate precipitate, placed it in an alumina crucible, and fired it in a muffle furnace a...

Embodiment 2

[0032]Take by weighing 5.4g manganese nitrate, 2.43g nickel nitrate, 0.27g cobalt nitrate, add deionized water and be configured to a solution of 1mol / L; take by weighing 5.4g sodium carbonate in addition, be dissolved in deionized water to form a 1mol / L solution; then Under the condition of stirring, the sodium carbonate solution was slowly dripped into the solution of the above mixed metal ions, then weighed 0.544g sodium dodecylsulfonate, added it in batches to the above mixed solution, stirred at room temperature for 3 After one hour, after adjusting the pH value to 8, it was transferred to the hydrothermal reaction kettle of 100mL polytetrafluoroethylene, and reacted for 10 hours at 120°C; centrifuged, and the filter cake was washed 5 times with deionized water, and the After drying in air at 100°C for 12 hours, 5.10 g of carbonate precipitates were obtained.

[0033] Weighed 2.22 g of the carbonate precipitate, placed it in an alumina crucible, and fired it in a muf...

Embodiment 3

[0036] Take by weighing 4.53g manganese sulfate, 2.43g nickel nitrate, 0.234g cobalt sulfate, add deionized water to be configured into a 1mol / L solution; in addition weigh 5.4g sodium carbonate, dissolve in deionized water to form a 1mol / L solution; then Under the condition of stirring, the sodium carbonate solution was slowly dripped into the solution of the above mixed metal ions, then weighed 0.544g sodium dodecylsulfonate, added it in batches to the above mixed solution, stirred at room temperature for 3 After one hour, after adjusting the pH value to 8, it was transferred to the hydrothermal reaction kettle of 100mL polytetrafluoroethylene, and reacted for 10 hours at 120°C; centrifuged, and the filter cake was washed 5 times with deionized water, and the After drying in air at 100°C for 12 hours, 4.89 g of carbonate precipitates were obtained.

[0037] Weighed 2.22 g of the carbonate precipitate, placed it in an alumina crucible, and fired it in a muffle furnace at 400°...

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Abstract

The invention discloses a preparation method of spinel type lithium manganese oxide for a spherical high-voltage anode material. The preparation method comprises the following steps of: preparing the spinel type lithium manganese oxide for the spherical high-voltage anode material by utilizing a hydrothermal-solid-phase two-step method; uniformly mixing a nickel source, a manganese source and a doped element chemical solution with a sodium/ammonium carbonate solution; adding surfactant into the mixed solution and preparing under a hydrothermal condition to prepare a spherical lithium manganese carbonate sediment; washing and drying, and then sintering to obtain a spherical lithium manganese oxide; mixing the oxide with a lithium source by liquid-phase ball milling, and drying; and finally, sintering to obtain an anode active material. According to the preparation method disclosed by the invention, the synthesis method is simple, the process is easy to control and the doped elements are introduced; physical and chemical properties of the material are optimized and the grain size of the material is uniform; and the discharge capacity is high and the multiplying power performance is good.

Description

technical field [0001] The invention relates to a spherical high-voltage positive electrode material spinel-type LiM x Ni 0.5-x mn 1.5 o 4 The preparation method of (M=Mg, Fe, Co, Ru, Zn, Ti, Cr, Ce, La, 0≤x≤0.05) belongs to the technical field of high-energy lithium ion batteries. Background technique [0002] With the global energy crisis and environmental pollution caused by automobiles, governments of various countries have successively invested huge sums of money in increasing the development of new energy vehicles. New energy electric vehicles and hybrid vehicles have become the development direction of future automobiles. At present, there are three main types of power batteries: lead-acid, nickel metal hydride and lithium power batteries. Judging from the future development trend, lithium-ion power batteries will become the mainstream and have broad application prospects. Correspondingly, the research and development of cathode materials, the key material o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122Y02E60/10
Inventor 许鹏杨续来刘大军
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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