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Nickel-based positive electrode material of lithium secondary battery and preparation method of nickel-based positive electrode material

A lithium secondary battery and positive electrode material technology, applied in secondary batteries, battery electrodes, positive electrodes, etc., can solve the problems of high manufacturing cost, complicated manufacturing process, poor high-temperature cycle performance and safety performance, and improve the crystal structure The effect of stability, simple manufacturing process and equipment, excellent cycle and high temperature performance

Pending Publication Date: 2022-05-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor high-temperature cycle performance and safety performance, complicated manufacturing process and high manufacturing cost of high-nickel positive electrode materials.

Method used

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  • Nickel-based positive electrode material of lithium secondary battery and preparation method of nickel-based positive electrode material
  • Nickel-based positive electrode material of lithium secondary battery and preparation method of nickel-based positive electrode material
  • Nickel-based positive electrode material of lithium secondary battery and preparation method of nickel-based positive electrode material

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Embodiment 1

[0030] The nickel-based positive electrode material of this embodiment is

[0031] Li 1.03 (Ni 0.93 co 0.04 mn 0.02 al 0.01 ) 0.998 Mo 0.002 o 2 ·(LiSiAlWO 7 ) 0.001 The preparation method, concrete steps are as follows:

[0032] (1) Configure nickel chloride, cobalt chloride, manganese chloride, and aluminum chloride into a 2.0mol / L mixed salt solution according to the molar ratio of Ni:Co:Mn:Al=0.93:0.04:0.02:0.01. The solution is metered and sprayed from the top of the roasting furnace, and the spray reaction gas enters from the bottom of the roasting furnace through external preheating. By controlling the roasting temperature to 900°C, the spray gas flow rate to 60L / min, the spray gas oxygen concentration to 95%, and the spray gas heating temperature The temperature is 300℃, the spray gas pressure is 0.6Mpa, the nozzle diameter is 10mm and other parameters are used for high-temperature spray roasting reaction. The two rapid high-temperature hydrolysis reactions p...

Embodiment 2

[0038] The nickel-based cathode material of this embodiment is Li 1.05 (Ni 0.93 mn 0.06 al 0.01 ) 0.998 Ba 0.002 o 2 ·(LiSiAlWO 7 ) 0.001 The preparation method, concrete steps are as follows:

[0039] (1) Configure nickel chloride, manganese chloride, and aluminum chloride into a 2.0mol / L mixed salt solution according to the molar ratio of Ni:Mn:Al=0.93:0.06:0.01, and spray the mixed salt solution from the top of the roasting furnace At the same time, the spray reaction gas enters from the bottom of the roasting furnace through external preheating. By controlling the roasting temperature to 915°C, the spray gas flow rate to 70L / min, the spray gas oxygen concentration to 97%, the spray gas temperature to 320°C, and the spray gas pressure to 0.7 Mpa, nozzle diameter 13mm and other parameters for high-temperature spray roasting reaction, the rapid high-temperature hydrolysis reaction of the two produces metal oxides that settle at the bottom of the roaster and are discha...

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Abstract

The invention discloses a nickel-based positive electrode material of a lithium secondary battery and a preparation method of the nickel-based positive electrode material, the chemical formula of the positive electrode material is Lia (NixMy) (1-z) NzO2. Fb, M is at least one of Co, Mn, Al or Mg; n is at least one of Ba, Mo, Ce, Al, Zr, Mg, Ti, Sr, Y, W or La; f is a LiSiAlWO7 compound; wherein 0.90 < = a < = 1.20, 0.1 < = x < = 1.0, 0 < = y < = 0.9, x + y = 1, 0.001 < = z < = 0.010, and 0.001 < = b < = 0.050. The preparation process of the positive electrode material has the advantages of simple process flow, high productivity, no ammonia or alkali in raw materials, and facilitation of wastewater recovery; the product has excellent comprehensive performance and the like, and a new low-cost high-performance lithium secondary battery positive electrode material is provided for large-scale application of new energy automobiles.

Description

technical field [0001] The invention belongs to the technical field of lithium ion secondary battery materials, and in particular relates to a nickel-based positive electrode material for lithium secondary batteries and a preparation method thereof. Background technique [0002] Under the general trend of global greening, electric vehicles, electric ships, wireless home appliances, drones, photovoltaic energy storage and other electrification and wireless demand for lithium secondary batteries are growing rapidly. Among them, new energy electric vehicles have become the largest demand for the increase in the volume of lithium secondary batteries. Power batteries pursue high energy density + low cost, and high nickel is currently the most mature direction of technological progress. High nickel can increase the energy density of batteries and solve the pain points of low cobalt metal reserves and high prices. In addition, the increase in battery energy density reduces the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/485H01M4/505H01M4/525H01M10/0525C01G53/00B82Y30/00B82Y40/00
CPCH01M4/366H01M4/505H01M4/525H01M4/485H01M4/483H01M10/0525C01G53/44B82Y30/00B82Y40/00H01M2004/028C01P2004/03C01P2006/40Y02E60/10
Inventor 吴川田新勇白莹吴锋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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