Nickel cobalt lithium manganate material and preparation method thereof

A technology of nickel-cobalt lithium manganese oxide and nickel-cobalt-manganese hydroxide, which is applied in the field of preparation of lithium-ion battery cathode materials, can solve the problems of high labor intensity, long reaction process steps, and unautomatic control of the reaction process, achieving excellent safety Performance, high temperature performance long effect

Active Publication Date: 2017-02-22
JIANGXI JIANGTE LITHIUM LON BATTERY MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are many compounds added in the above method, the reaction process steps are too long, and the reaction

Method used

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  • Nickel cobalt lithium manganate material and preparation method thereof
  • Nickel cobalt lithium manganate material and preparation method thereof
  • Nickel cobalt lithium manganate material and preparation method thereof

Examples

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Example Embodiment

[0031] Example 1 The mixture in this example is also a mixture of nickel, cobalt, manganese hydroxide and lithium carbonate. The mixture is packed in a sagger, that is, in a sagger, and the same applies below.

[0032] This embodiment 1 uses the method of the present invention to prepare a lithium nickel cobalt manganese oxide material. The stoichiometric ratio of nickel to cobalt manganese of the material is 8:1:1, and the chemical formula is LiNi 0.8 Co 0.1 Mn 0.1 O 2 , Using soluble nickel, cobalt, and manganese salts as raw materials, the specific process steps are as follows: 1) Co-precipitation reaction to prepare nickel cobalt manganese lithium precursor, using soluble nickel, cobalt sulfate and manganese chloride as raw materials, and adding water to make them separately A mixed aqueous solution of nickel, cobalt, and manganese salts, sodium hydroxide aqueous solution as a precipitating agent, ammonia water as a complexing agent, co-precipitation reaction under heating and ...

Example Embodiment

[0046] Example 2

[0047] The product LiNi prepared in Example 2 0.5 Co 0.2 Mn 0.3 O 2 The properties described for it are shown in Table 1. The molecular formula of the prepared product is LiNi 0.5 Co 0.2 Mn 0.3 O 2 , Control the stoichiometric ratio of nickel, cobalt and manganese to 5:2:3, and the preparation method and steps are the same as in implementation 1.

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Abstract

The invention relates to a preparation method of a nickel cobalt lithium manganate material. Soluble nickel, cobalt and manganese salts are used as raw materials; a coprecipitation reaction technology is used. The method is characterized in that the molecular formula of nickel cobalt lithium manganate is LiNixCoyMnzO2; the preparation comprises the following concrete process steps that (1) a nickel cobalt and manganese precursor is prepared through coprecipitation reaction; water is added into a reaction kettle device, so that nickel sulfate, cobalt sulfate and manganese sulfate are prepared into a mixed water solution; a sodium hydroxide water solution is added as a precipitant; ammonium hydroxide is added; the coprecipitation reaction is performed under the existence of heating and protection gas; filtering is performed to obtain filtrate and filter residue; the filter residue is cleaned to prepare a nickel cobalt and manganese hydroxide precursor; (2) reaction is performed to prepare a nickel cobalt lithium manganate product; the prepared nickel cobalt and manganese hydroxide precursor is baked and dried, and is then sieved to be fully stirred and mixed with lithium salts into a nickel cobalt and manganese hydroxide precursor and lithium salt mixture; the nickel cobalt and manganese hydroxide precursor and lithium salt mixture is loaded into an earthen bowl; high-temperature firing, crushing, sieving, mixing, sieving and iron removal are performed; packaging is performed to prepare the nickel cobalt lithium manganate material. A lithium ion battery manufactured by the prepared nickel cobalt lithium manganate product has the advantages of excellent safety performance, high-temperature performance and long cycle life.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery, in particular to a nickel-cobalt lithium manganese oxide material and a preparation method thereof. Background technique [0002] As a new type of green battery, lithium-ion batteries are widely used in wireless communication, transportation, aerospace and other aspects. Lithium-ion batteries are mainly composed of positive electrode materials such as lithium-intercalated transition metal oxides, negative electrode materials such as highly graphitized carbon , Diaphragm such as polyolefin microporous membrane and electrolyte materials. The lithium-ion cathode material is a crucial factor restricting the performance of lithium-ion batteries in all aspects. [0003] Lithium-ion battery cathode material is one of the key materials in lithium-ion batteries, and its performance will directly affect the performance of the entire lithium-ion battery. ...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 胡伟钟盛文李晓艳李喜福刘美景
Owner JIANGXI JIANGTE LITHIUM LON BATTERY MATERIAL
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