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5V spinel nickel lithium manganate material and preparation method thereof

A technology of lithium nickel manganate and spinel, which is applied in the field of 5V spinel lithium nickel manganate material and its preparation, can solve the problems of disorder, order, and inability to give full play to material properties, and achieves high specific capacity, The effect of high application value and simple preparation process

Active Publication Date: 2016-06-15
TIANJIN B&M SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the 5V spinel lithium nickel manganese oxide used in the field of lithium-ion secondary battery cathode materials is only a single result, either disordered or ordered, and cannot give full play to its material properties.

Method used

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  • 5V spinel nickel lithium manganate material and preparation method thereof
  • 5V spinel nickel lithium manganate material and preparation method thereof
  • 5V spinel nickel lithium manganate material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of a 5V spinel lithium nickel manganese oxide material, comprising the steps of:

[0023] 1) Add lithium carbonate, nickel hydroxide, manganese carbonate, ferrous oxalate and SuperP into a ball mill and mix evenly to obtain a material; each component in the material satisfies the molar ratio Li:Ni:Mn:Fe=1.0:0.5:1.49:0.01 ; SuperP quality: (lithium carbonate quality+nickel hydroxide quality+manganese carbonate quality+ferrous oxalate quality)=0.02;

[0024] 2) The material is roasted once in a roasting kiln and air atmosphere, the roasting temperature is 800°C and the roasting time is 4 hours, to obtain the first-time processed product;

[0025] 3) Mixing the primary treated product with 0.5% of its mass of zirconia in a high-speed mixer to obtain a secondary roasted product;

[0026] 4) Carry out the secondary roasting in the roasting kiln in the air atmosphere, the roasting temperature is 700°C, the roasting time is 4h, and the product is obtained...

Embodiment 2

[0029] A preparation method of a 5V spinel lithium nickel manganese oxide material, comprising the steps of:

[0030] 1) Add lithium carbonate, nickelous hydroxide, manganese dioxide, titanium oxide and KS6 into a ball mill and mix evenly to obtain a material; each component in the material satisfies the molar ratio Li:Ni:Mn:Ti=1.05:0.5:1.45:0.05 , KS6 quality: (lithium carbonate quality+nickel oxide quality+manganese dioxide quality+titanium oxide quality)=0.02;

[0031] 2) The material is roasted once in a roasting kiln and air atmosphere, the roasting temperature is 800°C, and the roasting time is 12 hours, to obtain the first-time processed product;

[0032] 3) Mixing the primary treated product with 0.2% of its mass of zirconia in a high-speed mixer to obtain a secondary roasted product;

[0033] 4) Carry out the secondary roasting in the roasting kiln in the air atmosphere, the roasting temperature is 700°C, the roasting time is 12h, and the product is obtained, which i...

Embodiment 3

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

[0036] 1) Add lithium carbonate, nickelous hydroxide, manganese dioxide, titanium oxide and ECP600 into a ball mill and mix evenly to obtain a material; each component in the material satisfies the molar ratio Li:Ni:Mn:Ti=1.02:0.5:1.49:0.01 , ECP600 quality: (lithium carbonate quality+nickel hydroxide quality+manganese trioxide quality+titanium oxide quality)=0.05;

[0037] 2) The material is roasted once in a roasting kiln and air atmosphere, the roasting temperature is 850°C, and the roasting time is 8 hours, to obtain the first-time processed product;

[0038] 3) Mixing the primary treated product with 0.5% of its mass of zirconia in a high-speed mixer to obtain a secondary roasted product;

[0039] 4) Carry out the secondary roasting in the roasting kiln in the air atmosphere, the roasting temperature is 750°C, the roasting time is 8h, and the product is obtained...

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Abstract

The invention discloses a 5V spinel nickel lithium manganate material and a preparation method thereof. The method comprises the following steps that 1, lithium salt, a nickel salt or nickel oxide, a manganese salt or manganese oxide, a metallic salt or metallic oxide and simple-substance carbon are mixed to be uniform to obtain a material; 2, primary roasting is performed on the material in a roasting kiln, and primary treatment matter is obtained; 3, the primary treatment matter and zirconium oxide are mixed to be uniform, secondary matter to be roasted is obtained, secondary roasting is performed on the secondary matter to be roasted in an air atmosphere in the roasting kiln, and then the 5V spinel nickel lithium manganate material is obtained. The molecular formula of the 5V spinel nickel lithium manganate material is (0.995-0.998)[Li(1-1.5)Ni(0.5)Mn(1.5-x)MxO4] / (0.002-0.005)ZrO2, wherein M is selected from Fe and Ti, x=0.01-0.05, and the structure comprises three layers from inside to outside. The preparation method is simple and high in applicability, and the prepared product is high in specific capacity and good in cycle performance.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium ion secondary batteries, in particular to a 5V spinel lithium nickel manganese oxide material and a preparation method thereof. Background technique [0002] 5V spinel-type lithium manganese nickel manganese oxide is developed on the basis of spinel-type lithium manganese oxide. Like lithium manganese oxide, it is a positive electrode material with three-dimensional lithium ion channels. The reversible specific capacity is 146.7mAh / g, which is comparable to manganese Lithium oxide is almost the same, but the voltage platform is about 4.7V, which is more than 15% higher than the 4V voltage platform of lithium manganate. It is a key raw material for the development of lithium-ion power batteries with high energy density and good rate performance. [0003] 5V spinel lithium nickel manganese oxide mainly has two structures, one is the disordered Fd3m structure, and the other is ...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 徐宁宋英杰伏萍萍吴孟涛
Owner TIANJIN B&M SCI & TECH
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