Method for preparing lithium-rich manganese-based layered lithium battery cathode material based on efficient solid-phase chemical complexation reaction

A technology of solid-phase complexation and positive electrode materials, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve the problem of low synthesis temperature and achieve the effects of low calcination temperature, low production cost and high production efficiency

Inactive Publication Date: 2015-02-18
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method maintains the advantages of simple operation of the traditional high-temperature solid-state reaction, and at the same time has the advantages of low synthesis temperature, short reaction time, unif

Method used

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  • Method for preparing lithium-rich manganese-based layered lithium battery cathode material based on efficient solid-phase chemical complexation reaction
  • Method for preparing lithium-rich manganese-based layered lithium battery cathode material based on efficient solid-phase chemical complexation reaction
  • Method for preparing lithium-rich manganese-based layered lithium battery cathode material based on efficient solid-phase chemical complexation reaction

Examples

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Example Embodiment

[0046] Example 1:

[0047] such as figure 1 Shown in the present invention based on solid-phase complexation chemical reaction to prepare lithium-rich manganese-based layered lithium battery cathode material (molecular formula is: Li[Li 0.067 Ni 0.138 Co 0.148 Mn 0.647 ]O 2 ) method, including the following steps:

[0048] (1) Material preparation: prepare lithium nitrate, nickel acetate, cobalt nitrate and manganese acetate as raw materials, prepare citric acid as solid coordination complexing agent;

[0049] (2) Grinding: According to the molecular formula (Li[Li 0.067 Ni 0.138 Co 0.148 Mn 0.647 ]O 2 ) in the metering ratio of each metal element, the raw material prepared in the step (1) and the solid coordination complexing agent are dry-mixed according to the ratio of 0.8:1, and ball-milled for 3 hours at room temperature;

[0050] (3) drying the mixture obtained in the above step (2) in an oven at 90° C. for 4 hours to obtain a solid phase complex precursor;

...

Example Embodiment

[0053] Example 2:

[0054] A lithium-rich manganese-based layered lithium battery cathode material prepared based on solid-phase complexation chemical reaction of the present invention (molecular formula is: Li[Li 0.157 Ni 0.138 Co 0.134 Mn 0.571 ]O 2 ) method, including the following steps:

[0055] (1) Material preparation: prepare lithium nitrate, nickel acetate, cobalt acetate and manganese acetate as raw materials, prepare citric acid as solid coordination complexing agent;

[0056] (2) Grinding: According to the molecular formula (Li[Li 0.157 Ni 0.138 Co 0.134 Mn 0.571 ]O 2 ) in the metering ratio of each metal element, the raw material prepared in the step (1) and the solid coordination complexing agent are dry-mixed according to the molar ratio of 0.6: 1, and ball-milled for 2 hours at room temperature;

[0057] (3) drying the mixture obtained in the above step (2) in an oven at 80° C. for 5 hours to obtain a solid phase complex precursor;

[0058] (4) place...

Example Embodiment

[0060] Example 3:

[0061] such as image 3 Shown in the present invention based on solid-phase complexation chemical reaction to prepare lithium-rich manganese-based layered lithium battery cathode material (molecular formula is: Li[Li 0.205 Ni 0.132 Co 0.134 Mn 0.529 ]O 2 ) method, including the following steps:

[0062] (1) Material preparation: prepare lithium acetate, nickel nitrate, cobalt nitrate and manganese acetate as raw materials, prepare citric acid as solid coordination complexing agent;

[0063] (2) Grinding: According to the molecular formula (Li[Li 0.205 Ni 0.132 Co 0.134 Mn 0.529 ]O 2 ) in the metering ratio of each metal element, the raw material prepared in the step (1) and the solid coordination complexing agent are dry-mixed according to the molar ratio of 1: 1, and ball-milled at room temperature for 3.5 hours;

[0064] (3) drying the mixture obtained in the above step (2) in an oven at 90° C. for 4 hours to obtain a solid phase complex precur...

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Abstract

The invention discloses a method for preparing a lithium-rich manganese-based layered lithium battery cathode material based on an efficient solid-phase chemical complexation reaction. The method comprises the following steps: firstly preparing a lithium source, a nickel source and a manganese source which are used as raw materials and preparing a solid ligand complexing agent; dry-blending the prepared raw materials and the solid ligand complexing agent according to a certain molar ratio based on stoichiometric ratio of metallic elements in a molecular formula of the target product lithium-rich manganese-based layered lithium battery cathode material which is to be prepared, and fully grinding; drying mixed materials obtained at low temperature to obtain a solid-phase complexing agent precursor; and sintering the solid-phase complexing agent precursor in the air or in an oxygen-enriched atmosphere, so as to obtain the lithium-rich manganese-based layered lithium battery cathode material. The method provided by the invention is simple and easy to control, is green and environmentally friendly, and has advantages of low production cost, high production efficiency and excellent product performance.

Description

technical field [0001] The invention belongs to the preparation method of lithium ion battery cathode material, in particular to a preparation method of lithium-rich manganese-based layered cathode material. Background technique [0002] As one of the most promising secondary batteries, lithium-ion batteries are favored due to their superior performance, and will be the preferred power source for future electric vehicles and energy storage fields. (See Zhang S S, Read J A.A new direction for the performance improvement of rechargeable lithium / sulfur batteries[J]. Journal of Power Sources, 2012, 200:77-82; Xu B, Qian D, Wang Z Y, Meng Y S. Recent progress in cathode materials research for advanced lithium ion batteries[J].Materials Science and Engineering R,2012,73:51-65.). For the current lithium-ion battery, the performance of the battery depends to a large extent on the performance of the positive electrode material, so the research on the positive electrode material is p...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/366H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 廖达前郭忻周春仙庞胜利习小明
Owner CHANGSHA RES INST OF MINING & METALLURGY
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