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A kind of high-nickel layered composite material and lithium-ion battery cathode material prepared therefrom

A layered composite material, lithium-ion battery technology, applied in the direction of battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of unsatisfactory chemical properties and stability, and achieve suitable for large-scale production, environmental friendliness, and improved cycle performance effect

Active Publication Date: 2021-08-17
华鼎国联四川电池材料有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The second technical problem to be solved by the present invention is to provide a high-nickel layered lithium-ion battery positive electrode material prepared from the above-mentioned high-nickel layered composite material to solve the electrochemical performance of low-cobalt / cobalt-free high-nickel positive electrode materials in the prior art And the problem of unsatisfactory stability;

Method used

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  • A kind of high-nickel layered composite material and lithium-ion battery cathode material prepared therefrom
  • A kind of high-nickel layered composite material and lithium-ion battery cathode material prepared therefrom
  • A kind of high-nickel layered composite material and lithium-ion battery cathode material prepared therefrom

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Embodiment 1-15

[0055] The preparation of high-nickel layered composites with selected compositions was carried out according to the chemical formula listed in Table 1 below.

[0056] Prepare NiSO according to the ratio of Ni and Mn in the chemical formula listed in Table 1 4 , MnSO 4 Mix the solution to control the total concentration of metal cations to 2.0mol / L.

[0057] Preparation of NaOH and NH 3 ·H 2 O mixed solution, control NaOH concentration to 3.0mol / L, NH 3 ·H 2 O concentration is 0.30mol / L.

[0058] Use a peristaltic pump to add the above two parts of the solution dropwise into the reaction vessel, control the volume ratio of the above sulfate mixed solution to the lye to 1:2.1, and control the pH value at about 10, and heat it in a water bath at 50°C for 24 hours; After the reaction is completed, after suction filtration, washing, and drying in a vacuum oven at 120°C for 12 hours, the desired M(OH) 2 Precursors (M=Ni, Mn).

[0059] Weigh LiOH, ZrO according to the ratio ...

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Abstract

The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a high-nickel layered composite material, and further discloses a preparation method thereof, and a lithium-ion battery cathode material, a lithium-ion battery cathode and a lithium-ion battery prepared from the composite material. The preparation method of the high-nickel layered composite material of the present invention is to uniformly dope a certain amount of metal ions in the material by roasting the prepared precursor containing Ni and Mn, the selected metal oxide and the lithium source material at high temperature , combined with the design of the type, content and sintering process of the doping elements, and then realize the control of the crystal structure of the positive electrode material; and further through the coating treatment of the selected constituent materials, the oxygen release amount of the material during the cycle is effectively reduced, and The cladding layer and the body material are effectively fused during the cladding process, ensuring that the material will not fall off during the cycle, and enhancing the structural stability of the material under high temperature and high pressure conditions.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a high-nickel layered composite material, and further discloses a preparation method thereof, and a lithium-ion battery cathode material, a lithium-ion battery cathode and a lithium-ion battery prepared from the composite material. Background technique [0002] In recent years, with the continuous development of the new energy industry, nickel-cobalt-manganese (NCM) ternary cathode materials have been used more and more in power batteries and consumer lithium batteries due to their advantages such as high capacity, high cycle stability, and moderate cost. widely. With the increasing demand for cruising range of new energy passenger vehicles, the demand for energy density of power batteries is also increasing, which promotes the application of high-nickel materials in power batteries. [0003] Although high-nickel ternary materials have greater advantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/131H01M10/0525
CPCH01M4/131H01M4/366H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 庄卫东柏祥涛闫东伟
Owner 华鼎国联四川电池材料有限公司
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