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NCM613 single crystal type positive electrode material and preparation method thereof

A positive electrode material and single crystal technology, applied in the field of NCM613 single crystal positive electrode material and its preparation, can solve problems such as high cobalt content and achieve excellent cycle performance

Inactive Publication Date: 2020-11-17
HUBEI RT ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of NCM613 single crystal positive electrode material and preparation method thereof

Method used

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  • NCM613 single crystal type positive electrode material and preparation method thereof
  • NCM613 single crystal type positive electrode material and preparation method thereof
  • NCM613 single crystal type positive electrode material and preparation method thereof

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preparation example Construction

[0031] One aspect of the present invention provides a preparation method of NCM613 single crystal type cathode material, the flow chart is as follows figure 1 As shown, the method includes the following steps:

[0032] (1) Weigh the raw materials according to the ratio, and combine part of the lithium hydroxide and precursor Ni 0.6 Co 0.1 Mn 0.3 (OH) 2 , Add the additives and the remaining lithium hydroxide into the mixer in turn, and then mix the materials to obtain the mixture;

[0033] (2) Put the mixture obtained in step (2) into a sagger, cut into pieces, and then transfer the sagger to a sintering furnace for the first sintering;

[0034] (3) The material obtained by the first sintering in step (2) is crushed, then mixed with the coating agent, and then transferred to the sintering furnace for the second sintering;

[0035] Wherein, the precursor Ni in the raw material 0.6 Co 0.1 Mn 0.3 (OH) 2 The molar ratio to lithium hydroxide is 1: (1.05-1.1).

[0036] In the method of the pre...

Embodiment 1

[0068] (1) Weigh the raw materials according to the ratio, the precursor Ni 0.6 Co 0.1 Mn 0.3 (OH) 2 (Dmin≥1.2μm, S content is 260ppm) and the molar ratio of lithium hydroxide is 1:1.06; half the weight of lithium hydroxide, precursor Ni 0.6 Co 0.1 Mn 0.3 (OH) 2 , 1000ppm of zirconia additive and the other half of the weight of lithium hydroxide were added to the VC mixer in turn, and then mixed (mixing procedure is 150rpm mixing 5min→300rpm mixing 5min→450rpm mixing 5min→600rpm mixing 5min →800rpm mixing for 20min) to obtain a mixture;

[0069] (2)) Weigh 1.5kg of the mixture obtained in step (2) into the sagger, and cut into pieces (the cutting method is 3*3), and then transfer the sagger to the muffle furnace for the first time Sintering includes three sintering stages. The sintering conditions of the first stage include: heating rate of 3℃ / min, sintering temperature of 500℃, and sintering time of 240min. The sintering conditions of the second stage include: heating rate of 1.5...

Embodiment 2

[0072] (1) Weigh the raw materials according to the ratio, the precursor Ni 0.6 Co 0.1 Mn 0.3 (OH) 2 (Dmin≥1.4μm, S content is 250ppm) and the molar ratio of lithium hydroxide is 1:1.09; half the weight of lithium hydroxide, precursor Ni 0.6 Co 0.1 Mn 0.3 (OH) 2 , Additives (1000ppm of zirconia additive, 200ppm of MgO, 200ppm of CaF 2 , 200ppm of H 3 BO 3 , 200ppm SrO and 200ppm Al 2 O 3 ) And the other half of the weight of lithium hydroxide are sequentially added to the VC mixer, and then mixed (mixing procedure is 150rpm mixing 5min→300rpm mixing 5min→450rpm mixing 5min→600rpm mixing 5min→800rpm mixing 20min ) To get the mixture;

[0073] (2) Weigh 1.5kg of the mixture obtained in step (2) into the sagger, and cut into pieces (the cutting method is 3*3), and then transfer the sagger to the muffle furnace for the first sintering It includes three sintering stages. The sintering conditions of the first stage include: heating rate of 2℃ / min, sintering temperature of 550℃, and sint...

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Abstract

The invention relates to the technical field of positive electrode material preparation, and discloses an NCM613 single crystal type positive electrode material and a preparation method thereof. The method comprises the following steps: (1) sequentially adding part of lithium hydroxide, a precursor Ni0.6Co0.1Mn0.3(OH)2, an additive and residual lithium hydroxide in raw materials into a mixer, andperforming mixing to obtain a mixture; (2) putting the mixture into a sagger, dicing the sagger, and then transferring the sagger into a sintering furnace to be sintered for the first time; and (3) crushing the material obtained by the first sintering, then mixing the crushed material with a coating agent, and then transferring the mixture into a sintering furnace for second sintering, wherein themolar ratio of the precursor Ni0.6Co0.1Mn0.3(OH)2 to the lithium hydroxide is 1: (1.05-1.1). According to the method, the NCM613 single crystal positive electrode material with low cobalt type, highspecific discharge capacity and excellent cycle performance can be prepared.

Description

Technical field [0001] The present invention relates to the technical field of preparation of positive electrode materials, in particular to a NCM613 single crystal type positive electrode material and a preparation method thereof. Background technique [0002] With the rapid development of China's economic and information age, the demand for new battery materials increases, and the market for new battery materials in China will continue to expand. Compared with commercial cathode materials such as lithium cobalt oxide, lithium iron phosphate, and lithium manganate, the nickel-cobalt-manganese ternary material has the highest gram capacity, better rate performance, and high and low temperature stability. It has the highest voltage stability, The comprehensive advantages of high capacity, large tap density, and high energy density have expanded the market share of battery cathode materials year by year and have been widely used. At the same time, market segmentation based on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/50H01M4/52H01M10/0525C30B29/22C30B1/10
CPCC30B1/10C30B29/22H01M4/50H01M4/52H01M10/0525H01M2004/028Y02E60/10
Inventor 熊奇孙杰梅京郝长旺程欢
Owner HUBEI RT ADVANCED MATERIALS CO LTD
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