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Preparation method of nickel-cobalt-manganese ternary material and anode material for lithium ion battery

A ternary material, nickel-cobalt-manganese technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high sewage treatment costs, environmental pollution, etc.

Inactive Publication Date: 2014-04-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the prior art can prepare nickel-cobalt-manganese ternary materials with higher tap density and spherical morphology, the method for preparing spherical nickel-cobalt-manganese ternary materials uses complexing agents or surfactants. The mixture or surfactant will increase the difficulty of later washing, the cost of sewage treatment will be high, and it will cause serious environmental pollution problems

Method used

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  • Preparation method of nickel-cobalt-manganese ternary material and anode material for lithium ion battery
  • Preparation method of nickel-cobalt-manganese ternary material and anode material for lithium ion battery
  • Preparation method of nickel-cobalt-manganese ternary material and anode material for lithium ion battery

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[0029] The invention provides a method for preparing a nickel-cobalt-manganese ternary material, comprising the following steps:

[0030] 1) Under the action of stirring, the soluble salt of nickel, soluble salt of cobalt, soluble salt of manganese and precipitant are subjected to co-precipitation reaction under the condition of pH value of 7.5-8.5 to obtain the precursor of nickel-cobalt-manganese ternary material , the stirring speed is 600 rpm to 1000 rpm, and the reaction temperature of the co-precipitation reaction is 40°C to 60°C;

[0031] 2) Calcining the nickel-cobalt-manganese ternary material precursor to obtain an intermediate product;

[0032] 3) The intermediate product is mixed with the lithium source and then sintered to obtain a nickel-cobalt-manganese ternary material.

[0033] The present invention comprehensively controls the stirring speed of the co-precipitation reaction during the preparation of the nickel-cobalt-manganese ternary material precursor, the...

Embodiment 1

[0061] Manganese sulfate, nickel sulfate and cobalt sulfate are dissolved in water to obtain a mixed solution of manganese sulfate, nickel sulfate and cobalt sulfate; the molar ratio of manganese sulfate, nickel sulfate and cobalt sulfate is 0.7:0.2:0.1, and the manganese sulfate 1. The total molar concentration of manganese ions, nickel ions and cobalt ions in the mixed solution of nickel sulfate and cobalt sulfate is 2.0mol / L;

[0062] Preparation molar concentration is the sodium carbonate aqueous solution of 2.1mol / L as precipitation agent;

[0063] The preparation molar concentration is the sodium carbonate aqueous solution of 0.15mol / L, is then adjusted its pH value with the acetic acid solution of 2.0mol / L with the molar concentration, obtains the sodium carbonate aqueous solution that the pH value is 8.3, and the molar concentration is 0.15mol / L as the reaction base liquid;

[0064] The above reaction bottom liquid was placed in a reaction kettle, the volume of the reac...

Embodiment 2

[0072] Manganese nitrate, nickel nitrate and cobalt nitrate are dissolved in water to obtain a mixed solution of manganese nitrate, nickel nitrate and cobalt nitrate; the molar ratio of manganese nitrate, nickel nitrate and cobalt nitrate is 0.65:0.15:0.2, and the manganese nitrate 1. The total molar concentration of manganese ions, nickel ions and cobalt ions in the mixed solution of nickel nitrate and cobalt nitrate is 2.0mol / L;

[0073] Preparation molar concentration is the sodium carbonate aqueous solution of 2.2mol / L as precipitation agent;

[0074] The preparation molar concentration is the sodium carbonate aqueous solution of 0.15mol / L, then with the molar concentration is the nitric acid solution of 0.5mol / L to adjust its pH value, obtains the sodium carbonate aqueous solution that the pH value is 8.3, and the molar concentration is 0.15mol / L as the reaction bottom liquid;

[0075] The above reaction bottom liquid was placed in a reactor, the volume of the reaction b...

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Abstract

The invention provides a preparation method of a nickel-cobalt-manganese ternary material; under the stirring effect, the co-precipitation reaction is implemented for soluble salt of nickel, soluble salt of cobalt, soluble salt of manganese and precipitating agent under the condition of 7.5-8.5 of pH value to obtain a nickel-cobalt-manganese ternary material precursor; the stirring speed is 600-1000 r / m; the reaction temperature of the co-precipitation reaction is 40-60 DEG C; the lithiation is implemented for the nickel-cobalt-manganese ternary material precursor to obtain the nickel-cobalt-manganese ternary material. The preparation method prepares the nickel-cobalt-manganese ternary material precursor with spherical morphology through comprehensively controlling the stirring speed and reaction temperature of the co-precipitation reaction and the pH value of the reaction system in the reaction process in the process of preparing the nickel-cobalt-manganese ternary material precursor; the method for preparing the nickel-cobalt-manganese ternary material, provided by the invention, is environment-friendly, and has lower cost.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a nickel-cobalt-manganese ternary material. Background technique [0002] Lithium Cell refers to the electrochemical system containing the most basic electrochemical unit of lithium (including lithium metal, lithium alloy, lithium ion and lithium polymer). Lithium batteries can be divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium, have a simple preparation process, are rechargeable, and have broad application fields. [0003] The positive electrode material of lithium ion battery is generally a salt compound containing three elements of nickel, cobalt and manganese, which can be divided into layered positive electrode material and spherical positive electrode material. The spherical positive electrode material of lithium ion battery not only has a tap density...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122H01M4/131H01M4/505H01M4/525Y02E60/10
Inventor 吴英强赵凤玉禚林海王立民
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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