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Synthesis of series nanometer lithium and manganese oxide for lithium ion battery

A technology of lithium manganese oxide and synthesis method, which is applied in the direction of lithium oxide;/hydroxide, battery electrode, manganese oxide/manganese hydroxide, etc., to achieve the effects of convenient control operation, low energy consumption, and good electrical performance

Inactive Publication Date: 2006-08-16
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a new hydrothermal synthesis method to prepare nanoscale lithium manganese oxide to solve the problem of particle size distribution uniformity, and at the same time provide a positive material with good electrochemical performance for lithium ion batteries

Method used

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  • Synthesis of series nanometer lithium and manganese oxide for lithium ion battery
  • Synthesis of series nanometer lithium and manganese oxide for lithium ion battery
  • Synthesis of series nanometer lithium and manganese oxide for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: LiMnO 2 Preparation of Nanorods or Nanoparticles

[0031] 0.100g γ-MnOOH nanorods (or nanowires), 5.035g LiOH·H 2 O, 10ml of distilled water and 20ml of absolute ethanol were reacted for 5 days at 120°C and 1.0-1.5Mpa in a 50ml reactor. After the reaction was completed, the product was taken out and rinsed with distilled water for several times until the pH value of the supernatant was around 7. The obtained black precipitate was dried in a vacuum oven at 60°C. The appearance of the product was black powder.

[0032] The XRD figure of product ( figure 1 ) analysis results show that the product is orthorhombic LiMnO 2 powder. The TEM image results of the product show that the morphology of the product is divided into two types due to the different morphology of the precursor. The precursor is γ-MnOOH nanorods, and the product is nanorods ( figure 2 ), the diameter is about 150nm-250nm, and the length is between 1-5μm. The precursor is γ-MnOOH nanowir...

Embodiment 2

[0033] Example 2: LiMn 2 0 4 Preparation of nanoparticles

[0034] 0.4g Mn 3 o 4 Nanoparticles, 33.568g LiOH·H 2 O. 200ml of distilled water was mixed evenly in a magnetically stirred reactor, and reacted for 7 days at a stirring speed of 150-250r / min under the conditions of a temperature of 160-170°C and a pressure of 1.3-1.5MPa. After the reaction was completed, the product was taken out, and the sample was washed with distilled water for several times until the pH value of the supernatant was around 7, and the obtained black precipitate was dried at 60°C. The appearance of the product was black powder.

[0035] By XRD ( Figure 4 ) analysis shows that: the product is cubic LiMn 2 o 4 powder. TEM photo ( Figure 5 ) shows that: the morphology of the product is nanoparticles, and its diameter is about 20nm-100nm.

Embodiment 3

[0036] Example 3: Li 2 MnO 3 Preparation of Nanorods or Nanoparticles

[0037] 0.100g precursor γ-MnOOH nanorods (or nanowires) or 0.1gMn 3 o 4 Nanoparticles with 6.758gK 2 S 2 o 8 , 5.035g LiOH·H 2 O and 30ml of distilled water were mixed evenly, then put into a 50ml reactor and reacted for 2 days at 150°C and 0.25-1.0MPa. After the reaction, the product was taken out, and the sample was washed with distilled water for several times until the pH value of the supernatant was around 7, and the obtained black precipitate was dried at 60°C. The appearance of the product was black powder.

[0038] By XRD ( Figure 6 ) analysis shows that the product is monoclinic Li 2 MnO 3 powder. The TEM photos show that the morphology of the product is divided into two types due to the different morphology of the precursor. If the precursor is γ-MnOOH nanorods, the product is nanorods ( Figure 7 ), its diameter is about 150nm-250nm, and its length is between 1-10μm. If the precu...

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Abstract

Synthesis of series nanometer lithium manganese oxide for lithium ion battery is carried out by taking mangano-manganic oxide or basic manganese oxide as precursor, hydrothermal reacting with excessive lithium hydrate in water or alcohol solution of autoclave, inserting lithium ion into lattice of manganese oxide, separating, washing and drying to obtain final product. It is simple and safe, has lower energy consumption, uniform granularity, better electrical performance and no environmental pollution.

Description

1. Technical field [0001] The invention relates to a preparation method of a positive electrode material of a chemical power source, in particular to a preparation method of a positive electrode material of a lithium ion battery, specifically a method for synthesizing a series of nanometer lithium manganese oxides for a lithium ion battery. 2. Background technology [0002] With the rapid development of the electronic industry, the power supply is required to develop in the direction of miniaturization, high energy density and high power density. Since Japan's Sony Corporation first developed lithium-ion batteries in 1990, this new battery has largely met this requirement. Now lithium-ion batteries have been widely used in miniaturized electrical appliances such as mobile phones and notebook computers, and their application in electric vehicles has also achieved initial results. [0003] At present, the cathode material of lithium-ion batteries is mainly LiCoO 2 (lithium c...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01D15/02H01M4/48H01M4/50H01M4/505
CPCY02E60/10
Inventor 张卫新杨则恒王强刘怡
Owner HEFEI UNIV OF TECH
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