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Cathode material of lithium ion battery and preparation method of cathode material

A technology for lithium-ion batteries and cathode materials, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high-temperature cycle performance and rate performance that need to be further improved, and achieve good high-temperature cycle performance, improve rate performance, and increase the number of products Effect

Active Publication Date: 2012-09-19
宁波富理电池材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of lithium manganate materials reported above did not control the surface morphology of lithium manganate materials, so the high-temperature cycle performance and rate performance of the lithium manganate materials need to be further improved

Method used

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  • Cathode material of lithium ion battery and preparation method of cathode material
  • Cathode material of lithium ion battery and preparation method of cathode material
  • Cathode material of lithium ion battery and preparation method of cathode material

Examples

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preparation example Construction

[0048] Correspondingly, the present invention also provides a kind of preparation method of lithium-ion battery cathode material, comprises the following steps:

[0049] Manganese source compound, lithium source compound, M source compound and Z source compound are mixed uniformly and then pretreated, cooled and ground to obtain a lithium manganate precursor, M is Li, Mg, Al, Ca, Sc, Ti, V, Cr, One of Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, Sn, La, Ce, Nd, Hf, Ta, W, Pt, Au, Ru and Pb or Several kinds; Z is one or more of F, Cl, Br, I and Se;

[0050] The lithium manganate precursor is subjected to roasting treatment, and solid powder is obtained after cooling and grinding, and the way of the roasting treatment is to change the roasting temperature several times during the roasting process;

[0051] The solid powder is annealed, cooled and ground to obtain the positive electrode material of the lithium ion battery.

[0052] In the present invention, the manganese sou...

Embodiment 1～10

[0066] According to the raw materials, dosage and conditions shown in Table 1, the lithium manganate precursor was prepared according to the following steps:

[0067] The manganese source compound, the lithium source compound, the M source compound, the M source compound and the Z source compound are uniformly mixed, pretreated, cooled and ground to obtain a lithium manganate precursor.

[0068] Table 1 Preparation of lithium manganate precursor formula and conditions in Examples 1-10 of the present invention

[0069]

[0070]

[0071] Continuation of Table 1 Preparation of lithium manganate precursor formula and conditions in Examples 1 to 10 of the present invention

[0072]

[0073]

[0074] According to the raw materials, consumption and conditions shown in Table 2, the lithium manganate material was prepared according to the following steps:

[0075] The lithium manganate precursor is roasted several times, cooled and ground to obtain a solid powder; then the o...

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Abstract

The invention discloses a cathode material of a lithium ion battery. The cathode material has an atomic ratio of LiaMxMn(2-x)O(4-y)Zy. Primary particles of the cathode material of the lithium ion battery are substantially spherical, and the surface of each primary particle consists of 2 to 120 multilayer crystal dislocation frustums. The invention provides a preparation method of the cathode material of the lithium ion battery. The cathode material of the lithium ion battery is prepared by annealing, cooling and grinding a lithium manganate precursor in a roasting treatment mode of repeatedly changing roasting temperature. The invention has the advantages that by repeatedly changing the roasting temperature in the roasting process, the prepared cathode material of the lithium ion battery has a dislocation structure, and the mobility of ions and electrons from the inner part of the material to the outer part of the material is improved, and the magnification performance of a lithium manganate material is improved. Because the cathode material is substantially spherical, the specific surface area of the lithium manganate material is reduced, and manganese is difficult to dissolve, so the cathode material of the lithium ion battery is high in high-temperature cycle performance.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, and more specifically, relates to a lithium-ion battery cathode material and a preparation method thereof. Background technique [0002] As a new type of energy storage system, lithium-ion batteries have the advantages of good safety, high voltage and specific energy, and long charge and discharge life. They are widely used in digital products such as mobile phones and notebook computers, as well as power tools, electric bicycles, and electric vehicles. Energy storage device for power products. Spinel lithium manganate material is a lithium-ion battery cathode material with three-dimensional lithium ion channels. It has the advantages of low price, high potential, environmental friendliness, and high safety. It is suitable for application in the field of energy storage batteries for electric tools and electric vehicles. . The current research results show that the poor high-temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505
CPCY02E60/122Y02E60/10
Inventor 刘兆平夏永高赛喜雅勒图
Owner 宁波富理电池材料科技有限公司
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