Simple preparation method of Al and Zr co-doped ultrahigh nickel ternary single crystal material

A single crystal material, co-doping technology, applied in the direction of chemical instruments and methods, nickel compounds, electrical components, etc., can solve problems such as in-situ doping, ultra-high nickel ternary single crystal positive electrode material preparation complexity, etc., to avoid Calcination treatment, improvement of electrochemical performance, and sufficient growth effect

Pending Publication Date: 2022-03-22
TIANJIN B&M SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, the present invention provides a simple preparation method of an Al, Zr co-doped ultra-high nickel ternary single crystal material, which avoids the preparation of the ultra-high nickel ternary single crystal positive electrode material being too complicated and The problem of its in-situ doping

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  • Simple preparation method of Al and Zr co-doped ultrahigh nickel ternary single crystal material
  • Simple preparation method of Al and Zr co-doped ultrahigh nickel ternary single crystal material
  • Simple preparation method of Al and Zr co-doped ultrahigh nickel ternary single crystal material

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Embodiment 1

[0029] A kind of simple preparation method of Al, Zr co-doped ultra-high nickel ternary single crystal material, comprises the following steps:

[0030] S1, Lithium nitrate, nickel nitrate, cobalt nitrate, manganese nitrate according to molecular formula LiNi 0.95 co 0.025 mn 0.025 o 2 The molar ratio is dissolved in deionized water, and aluminum nitrate and zirconium nitrate are added relative to the target product 1000ppm doping amount, the metal ion concentration is 1mol / L, then add glycine and ammonium nitrate, wherein glycine and metal ion molar ratio is

[0031] 1:1, the molar ratio of ammonium nitrate and glycine is 1:1, stir evenly to obtain a mixed solution;

[0032] S2. Heating the above mixed solution to 80° C., evaporates and loses water and becomes viscous gradually, and finally obtains a brown gel substance;

[0033] S3. Continue to raise the temperature of the obtained brown gel to about 200° C., and keep it warm for 2 hours, so that the dry gel undergoes se...

Embodiment 2

[0037] A kind of simple preparation method of Al, Zr co-doped ultra-high nickel ternary single crystal material, comprises the following steps:

[0038] S1, Lithium nitrate, nickel nitrate, cobalt nitrate, manganese nitrate according to molecular formula LiNi 0.95 co0.03 mn 0.02 o 2 The molar ratio is dissolved in deionized water, and aluminum nitrate and zirconium nitrate are added relative to the target product 1500ppm doping amount, the metal ion concentration is 1.5mol / L, and then acrylic acid and ammonium nitrate are added, wherein the molar ratio of acrylic acid to metal ion is 2 :1, ammonium nitrate and acrylic acid mol ratio are 2:1, stir to obtain mixed solution;

[0039] S2. Heat up to 90°C to heat the above mixed solution, evaporate and lose water and gradually become viscous, and finally obtain a brown gel substance;

[0040] S3. Continue to raise the temperature of the obtained brown gel to about 250° C., and keep it warm for 1.5 hours, so that the dry gel unde...

Embodiment 3

[0043] A kind of simple preparation method of Al, Zr co-doped ultra-high nickel ternary single crystal material, comprises the following steps:

[0044] S1, Lithium nitrate, nickel nitrate, cobalt nitrate, manganese nitrate according to molecular formula LiNi 0.96 co 0.02 mn 0.02 o 2 The molar ratio is dissolved in deionized water, and aluminum nitrate and zirconium nitrate are added relative to the target product 2000ppm doping amount, the metal ion concentration is 2mol / L, then add citric acid and ammonium nitrate, wherein the citric acid and metal ion molar ratio is 2:1, the molar ratio of ammonium nitrate to citric acid is 1:1, stir evenly to obtain a mixed solution;

[0045] S2. Heating the above mixed solution to 95° C., evaporates and loses water and becomes viscous gradually, and finally obtains a brown gel substance;

[0046] S3. Continue to raise the temperature of the obtained brown gel to about 300° C., and keep it warm for 1 hour, so that the dry gel undergoes...

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Abstract

The invention discloses a simple preparation method of an Al and Zr co-doped ultra-high nickel ternary single crystal material, which realizes preparation of the ultra-high nickel ternary single crystal material and in-situ co-doping of Al and Zr elements through low-temperature combustion reaction of a mixed system of nitrate, an organic complexing agent and ammonium nitrate. Compared with an existing method for preparing the high-nickel layered positive electrode material, the method is easy to operate and low in ignition temperature, a combustion reaction is promoted by using a large amount of oxidizing agent ammonium nitrate, pre-sintering treatment of a precursor in a low-temperature section can be avoided, energy consumption is reduced, and the method is suitable for industrial production. In addition, due to the violent combustion reaction and high-temperature calcination, the crystal growth of the single crystal material is sufficient, the structural stability is high, and the electrochemical performance of the ultrahigh-nickel ternary positive electrode material is comprehensively improved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and in particular relates to a simple and convenient preparation method of an Al and Zr co-doped ultra-high nickel ternary single crystal material. Background technique [0002] As an efficient energy conversion and storage device, lithium-ion batteries have been widely used in various portable electronic devices, new energy vehicles and large-scale energy storage power stations. However, the rapid development of electric vehicles in recent years has put forward higher requirements on the energy density of lithium-ion batteries, and the cathode material is a key factor affecting and restricting its energy density. Therefore, there is an urgent need to develop a new cathode material with low cost, high energy density, and good safety to improve the electrochemical performance of lithium-ion batteries. [0003] High-nickel layered cathode materials, especially ultra-high-nick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/36H01M4/505H01M4/525H01M10/0525
CPCC01G53/50H01M4/366H01M4/505H01M4/525H01M10/0525H01M2004/028C01P2002/72C01P2004/03C01P2006/40Y02E60/10
Inventor 李红磊吕菲吉长印唐淼陈志宇徐宁吴孟涛
Owner TIANJIN B&M SCI & TECH
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