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A kind of lithium ion battery cathode material precursor and preparation method thereof

A technology for lithium ion batteries and cathode materials, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited improvement of loose and porous properties, low energy density of lithium manganate materials, and low packing density of lithium manganate materials. The effect of improving energy density, simple preparation method, easy operation and control

Active Publication Date: 2015-08-19
JIANGSU DANGSHENG MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the lithium manganese oxide material synthesized by low-density manganese oxide material has a low bulk density, which cannot meet the energy density requirements of power batteries.
The main factors affecting the morphology and particle density of lithium manganese oxide materials are the morphology, density, porosity and other properties of the manganese source compound used. Manganese carbonate and chemical manganese dioxide (CMD) have relatively low densities, so they are used The energy density of the prepared lithium manganate material is also very low. Although the widely used electrolytic manganese dioxide (EMD) manganese source precursor has a higher density than the above two materials, its structure has water absorption. , porosity and other defects, the compaction density of the prepared lithium manganate material pole piece is generally lower than 3.0g / cm 3 , it is difficult to meet the requirements of the power battery market for the energy density of cathode materials
[0006] In the patent application US6517803, the density of manganese dioxide is increased to a certain extent by carrying out sintering pretreatment to manganese dioxide material. The improvement of the energy density of the lithium manganese oxide material prepared from the treated manganese dioxide also had little effect

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  • A kind of lithium ion battery cathode material precursor and preparation method thereof
  • A kind of lithium ion battery cathode material precursor and preparation method thereof
  • A kind of lithium ion battery cathode material precursor and preparation method thereof

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Embodiment 1

[0035] A kind of lithium ion battery cathode material precursor, is manganese oxide, and its general formula is Mn 1.9 Al 0.1 o 3 ,Such as figure 1As shown, the primary particle size is about 3-5 μm, and the specific surface area is 0.5m 2 / g, the tap density is 2.8g / cm 3 . figure 2 For the Mn 1.9 Al 0.1 o 3 SEM image of the material. Its preparation method is as follows:

[0036] Mix electrolytic manganese dioxide and aluminum hydroxide with a molar ratio of Mn:Al of 1.9:0.1 for 4 hours, sinter at 900°C for 6 hours, cool naturally to room temperature, crush and sieve to obtain high-density Mn 1.9 Al 0.1 o 3 Material.

[0037] A kind of positive electrode material of lithium ion battery is lithium manganese oxide, and its general formula is Li 1.1 mn 1.90 Al 0.10 o 3.85 f 0.15 , the primary particle size is about 5μm, and the specific surface area is 0.15m 2 / g, the tap density is 2.5g / cm 3 , the specific preparation method is as follows:

[0038] Mix the ...

Embodiment 2

[0041] A lithium-ion battery cathode material precursor, which is manganese oxide, and its general formula is Mn 1.5 Ce 0.5 o 2.95 Cl 0.05 , the primary particle size is about 2μm, and the specific surface area is 1.7m 2 / g, the tap density is 2.7g / cm 3 , its preparation method is as follows:

[0042] Mix manganese carbonate, cerium oxide, and manganese chloride with a molar ratio of Mn:Ce:Cl of 1.5:0.5:0.05 for 5 hours, sinter at 700°C for 6 hours, cool naturally to room temperature, crush and sieve to obtain high-density Mn 1.5 Ce 0.5 o 2.95 Cl 0.05 Material.

[0043] A kind of positive electrode material of lithium ion battery is lithium manganese oxide, and its general formula is Li 1.1 mn 1.5 Ce 0.5 o 3.95 Cl 0.05 , the primary particle size is about 1 μm, and the specific surface area is 0.4m 2 / g, the tap density is 2.2g / cm 3 , the specific preparation method is as follows:

[0044] Lithium carbonate with a molar ratio of Li:Mn of 1.1:1 was mixed with th...

Embodiment 3

[0047] A kind of positive electrode material precursor of lithium ion battery is manganese oxide, and its general formula is (Mn 0.98 Cr 0.02 ) 3 o 4 , the primary particle size is about 0.5μm, and the specific surface area is 3.0m 2 / g, the tap density is 2.5g / cm 3 , its preparation method is as follows:

[0048] Mix manganese carbonate and nickel sulfate with a Mn:Cr molar ratio of 0.98:0.02 for 5 hours, sinter at 1200°C for 6 hours, cool naturally to room temperature, crush and sieve to obtain high-density (Mn 0.98 Cr 0.02 ) 3 o 4 Material.

[0049] A kind of positive electrode material of lithium ion battery is lithium manganese oxide, and its general formula is Li 1.1 mn 1.96 Cr 0.04 o 2 , the primary particle size is about 0.7μm, and the specific surface area is 0.6m 2 / g, the tap density is 2.1g / cm 3 , the specific preparation method is as follows:

[0050] Lithium hydroxide with a molar ratio of Li:Mn of 1.2:2 was mixed with the above-mentioned manganese...

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Abstract

The invention discloses a lithium-ion battery cathode material precursor and a preparation method thereof, in particular a high-density manganese oxide used for synthetizing a lithium manganate cathode material and a preparation method thereof; and the invention also relates to the lithium manganate material prepared from the precursor and a lithium-ion battery prepared adopting the cathode material. The general formula of the manganese oxide is Mn1-xMxOa-yLy, wherein 0<=x<=0.5, 0<=y<=0.5, x and y are not zero at the same time, 1.2<=a<=2.0, M is one or more of Sb, Cr, Co, Ni, Mg, Ca, Sr, Ba, Na, K, Al, Be, B, Ti, Zr, Y, Cu, Zn, Ga, Sn, V, Fe, Bi, Si, Sc, Sm, Ce, Mo, Nb, Pr and La, and L is one or more of F, S, Cl, Br and I. The manganese oxide and lithium manganate cathode material have the characteristic of high density and can be used to prepare the lithium-ion battery with high energy density; and the preparation method of the material is simple and the material is easy in industrial production.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material precursor and a preparation method thereof, in particular to a high-density manganese oxide raw material for synthesizing lithium manganate cathode materials and a preparation method thereof. [0002] The invention also relates to the cathode material of the lithium ion battery prepared by the precursor and the lithium ion battery prepared by the cathode material. Background technique [0003] As an emerging power source, lithium-ion batteries have many advantages such as high voltage, high capacity, light weight, small size, safety and environmental protection, so they are widely used in mobile phones, notebook computers, digital products and other fields. With the improvement and improvement of the energy density and safety of lithium-ion batteries, it will be widely used in various emerging fields such as electric tools in the future, especially as a power source for electric vehicles, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/131C01G45/12
CPCY02E60/122Y02E60/10
Inventor 白厚善陈彦彬张杰韩坤明
Owner JIANGSU DANGSHENG MATERIAL TECH CO LTD