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Spherical 5-V spinel lithium nickel manganese oxide material and preparation method thereof

A technology of lithium nickel manganate and spinel is applied in the field of spherical 5V spinel lithium nickel manganate material and its preparation, which can solve the problem of uneven mixing of elements in the solid phase method, and achieve the effects of inhibiting dissolution and improving cycle performance.

Inactive Publication Date: 2017-06-30
TIANJIN B&M SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a preparation method of a spherical 5V spinel lithium nickel manganese oxide material, which combines the advantages of the existing liquid-phase method and solid-phase method, and saves the necessary precipitation of lithium in the liquid-phase method source, nickel source, and manganese source, and can overcome the defects of uneven mixing of elements in the solid phase method

Method used

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  • Spherical 5-V spinel lithium nickel manganese oxide material and preparation method thereof
  • Spherical 5-V spinel lithium nickel manganese oxide material and preparation method thereof
  • Spherical 5-V spinel lithium nickel manganese oxide material and preparation method thereof

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Embodiment 1

[0026] A preparation method of a spherical 5V spinel lithium nickel manganese oxide material, comprising the steps of:

[0027] 1) Dissolve 1mol lithium nitrate, 0.5mol nickel nitrate, 1.5mol manganese nitrate and polyethylene glycol with the quality of the above three substances and 5% in deionized water to obtain material I;

[0028] 2) Spray drying the material I at a drying temperature of 240° C. to obtain material II;

[0029] 3) Roasting the material II once in a roasting kiln and air atmosphere, the roasting temperature is 800°C, and the roasting time is 12 hours, to obtain the material III;

[0030] 4) Add material III and copper acetate whose mass is 2% of the mass of material III into deionized water, stir and mix evenly at high speed to obtain material IV;

[0031] 5) Spray drying material IV at a drying temperature of 240° C. to obtain material V;

[0032] 6) Carry out secondary roasting of material V in a roasting kiln in an air atmosphere at a roasting temperat...

Embodiment 2

[0035] A preparation method of a spherical 5V spinel lithium nickel manganese oxide material, comprising the steps of:

[0036] 1) Dissolve 1mol lithium nitrate, 0.5mol nickel nitrate, 1.5mol manganese nitrate and polyethylene glycol with the quality of the above three substances and 10% in deionized water to obtain material I;

[0037] 2) Spray drying the material I at a drying temperature of 280° C. to obtain material II;

[0038] 3) Roasting the material II once in a roasting kiln in an air atmosphere, the roasting temperature is 900° C., and the roasting time is 4 hours, to obtain the material III;

[0039] 4) adding material III and magnesium acetate whose mass is 5% of material III to deionized water, and stirring at high speed to mix evenly to obtain material IV;

[0040] 5) Spray drying material IV at a drying temperature of 240° C. to obtain material V;

[0041] 6) Carry out secondary roasting of material V in a roasting kiln in an air atmosphere at a roasting tempe...

Embodiment 3

[0043] A preparation method of a spherical 5V spinel lithium nickel manganese oxide material, comprising the steps of:

[0044] 1) 1.05mol lithium nitrate, 0.5mol nickel nitrate, 1.5mol manganese nitrate and polyvinylpyrrolidone whose quality is the above three substances and 10% are dissolved in deionized water to obtain material I;

[0045] 2) Spray drying the material I at a drying temperature of 240° C. to obtain material II;

[0046] 3) Roasting the material II once in a roasting kiln and air atmosphere, the roasting temperature is 800°C, and the roasting time is 12 hours, to obtain the material III;

[0047] 4) Add material III and zinc acetate whose mass is 2% of the mass of material III into deionized water, stir and mix evenly at high speed to obtain material IV;

[0048] 5) Spray drying material IV at a drying temperature of 240° C. to obtain material V;

[0049] 6) Carry out secondary roasting of material V in a roasting kiln in an air atmosphere at a roasting tem...

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Abstract

The invention discloses a preparation method for a spherical 5-V spinel lithium nickel manganese oxide material. The preparation method comprises the following steps: dissolving a lithium salt, a nickel salt, a manganese salt and a binder in deionized water so as to obtain a material I, wherein a mol ratio of Li to Ni to Mn is (1-1.05): 0.5: 1.5, and the mass of the binder accounts for 5 to 10% of the total mass of a lithium salt, a nickel salt and a manganese salt; subjecting the material I to spray drying and then to primary roasting at 800 to 900 DEG C in an air atmosphere for 4 to 12 h; uniform mixing a product obtained in the previous step with acetate in ionized water under stirring; and carrying out spray drying and carrying out secondary roasting at 450 to 550 DEG C for 6 to 12 h so as to obtain the spherical 5-V spinel lithium nickel manganese oxide material. The preparation method provided by the invention integrates the advantages of a conventional liquid-phase method and a conventional solid-phase method, omits the necessary step of precipitation of a lithium source, a nickel source and a manganese source in the liquid-phase method and overcomes the defect of non-uniform mixing of elements in the solid-phase method.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium ion secondary batteries, in particular to a spherical 5V spinel lithium nickel manganese oxide material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high open circuit voltage, high energy density, long service life, no memory effect, no pollution, and small self-discharge. It is currently the battery system with the best comprehensive performance and the battery system with the widest application range. After more than ten years of rapid development, the lithium-ion battery industry chain has become increasingly mature in China, and its technical performance, maturity and industrialization have reached a considerable scale. In the future, it will be the first choice for new energy and electric vehicle industry batteries. , with absolute promotion and application advantages and huge development space. As we all ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/628H01M10/0525Y02E60/10
Inventor 宋英杰徐宁伏萍萍马倩倩吴孟涛
Owner TIANJIN B&M SCI & TECH
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