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Preparation method of hollow biconical micro-nano structure spinel lithium manganate cathode material

A technology of micro-nano-structured lithium manganate, which is applied in structural parts, battery electrodes, electrical components, etc., achieves the effects of stable high-temperature cycle performance, simple and easy preparation methods, and cheap and easy-to-obtain raw materials.

Active Publication Date: 2019-02-01
贵州百思特新能源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, although the current research on spinel-type lithium manganate cathode materials has made great progress, its performance still needs to be improved to meet the needs of industrial production.

Method used

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  • Preparation method of hollow biconical micro-nano structure spinel lithium manganate cathode material
  • Preparation method of hollow biconical micro-nano structure spinel lithium manganate cathode material
  • Preparation method of hollow biconical micro-nano structure spinel lithium manganate cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Proceed as follows:

[0026] (1) KMnO 4 Dissolve in deionized water, add appropriate amount of hydrochloric acid, and make KMnO 4 A solution with a concentration of 0.01mol / L and a hydrochloric acid concentration of 0.5mol / L;

[0027] (2) After the above mixed solution is stirred evenly, it is pumped into the hydrothermal reaction kettle and reacted at 120 ℃ to form the precursor β-MnO 2 ;

[0028] (3) After the precursor is filtered, washed and dried, it is evenly mixed with lithium compound and aluminum nitrate in a molar ratio of Li:Al:Mn=1:0.1:1.9, and the drying is carried out at 80°C;

[0029] (4) The homogeneous mixture of the precursor and the lithium compound is fired in a tube furnace at a high temperature of 700 ° C for 10 h, and LiAl is obtained after cooling down to room temperature 0.1 mn 1.9 o 4 Material.

[0030] The mixed solution added to the reactor in step (2) accounts for 50% of the total volume of the reactor, and the reaction time is 14 ho...

Embodiment 2

[0035] Proceed as follows:

[0036] (1) KMnO 4 Dissolve in deionized water, add appropriate amount of hydrochloric acid, and make KMnO 4 A solution with a concentration of 0.015mol / L and a hydrochloric acid concentration of 0.7mol / L;

[0037] (2) After the above mixed solution is stirred evenly, it is pumped into the hydrothermal reaction kettle, and reacted at 150 ℃ to form the precursor β-MnO 2 ;

[0038] (3) After the precursor is filtered, washed and dried, it is evenly mixed with lithium compound and aluminum nitrate in a molar ratio of Li:Al:Mn=1:0.1:1.9, and the drying is carried out at 100°C;

[0039] (4) Burn the homogeneous mixture of the precursor and the lithium compound in a tube furnace at a high temperature of 750°C for 15 hours, and obtain LiAl after cooling down to room temperature. 0.1 mn 1.9 o 4 Material.

[0040] The mixed solution added to the reactor in step (2) accounts for 70% of the total volume of the reactor, and the reaction time is 17 hours....

Embodiment 3

[0045] Proceed as follows:

[0046] (1) KMnO 4 Dissolve in deionized water, add appropriate amount of hydrochloric acid, and make KMnO 4 A solution with a concentration of 0.02mol / L and a hydrochloric acid concentration of 0.8mol / L;

[0047] (2) After the above mixed solution is stirred evenly, it is pumped into the hydrothermal reaction kettle and reacted at 170 ℃ to form the precursor β-MnO 2 ;

[0048] (3) After the precursor is filtered, washed and dried, it is evenly mixed with lithium compound and aluminum nitrate in a molar ratio of Li:Al:Mn=1:0.1:1.9, and the drying is carried out at 120°C;

[0049] (4) The homogeneous mixture of the precursor and the lithium compound is fired in a tube furnace at a high temperature of 800 ° C for 20 hours to obtain LiAl 0.1 mn 1.9 o 4 Material.

[0050] The mixed solution added to the reactor in step (2) accounts for 80% of the total volume of the reactor, and the reaction time is 20 hours.

[0051] The filtration and washing ...

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Abstract

The invention relates to a preparation method of a spinel lithium manganite anode material with a hollow dual-cone type micro-nano structure. For the material is possessed of the hollow dual-cone type micro-nano structure, the material has high specific discharge capacity and excellent high-temperature circulation performance; after the charging and discharging circulation for a long time, the material still can keep good crystallinity and microstructure. The preparation method has the advantages of low-price and easy-obtained raw material, simple and easy operation, green, economy and environment-friendly, and others; besides, the method is good for realizing the large-scale industrial production.

Description

technical field [0001] The invention relates to the technology of positive electrode materials for lithium-ion secondary batteries, in particular to a method for preparing a hollow biconical micro-nano structure spinel lithium manganate positive electrode material. Background technique [0002] Cathode material is the key raw material of lithium-ion batteries, its performance determines the performance of lithium-ion batteries, and its price determines the cost of lithium-ion batteries. In addition, although the research on lithium-ion batteries has made great progress in recent years, especially in terms of negative electrode material systems and electrolyte systems, the development of positive electrode materials is relatively lagging behind. Therefore, the study of cathode materials for lithium-ion batteries is of vital importance for the development and improvement of the performance of the entire battery. At present, lithium cobalt oxide is the main positive electrode ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M10/0525
CPCH01M4/505H01M10/0525Y02E60/10
Inventor 占丹肖作安梁英崔萍
Owner 贵州百思特新能源材料有限公司
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