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Titanate radical manganese lithium/carbon composite anode material for chargeable lithium battery and preparation method thereof

A technology of lithium manganese titanate and cathode material, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve problems such as poor conductivity, and achieve the effect of easy operation, high cost performance, and improved electrochemical performance.

Inactive Publication Date: 2009-05-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a lithium manganese titanate / carbon composite positive electrode material for rechargeable lithium batteries with good electrochemical activity and a preparation method for the disadvantage of poor conductivity of titanate positive electrode materials

Method used

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  • Titanate radical manganese lithium/carbon composite anode material for chargeable lithium battery and preparation method thereof
  • Titanate radical manganese lithium/carbon composite anode material for chargeable lithium battery and preparation method thereof
  • Titanate radical manganese lithium/carbon composite anode material for chargeable lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 4.9g Mn(Ac) 2 4H 2 O and 6.8g Ti(OC 4 h 9 ) 4 Add it to 20ml of ethanol, react in a sealed flask at 30°C for 24h, transfer to an evaporating dish for drying at 80°C, then transfer to a tubular resistance furnace, and heat treat at 800°C for 3h under the protection of nitrogen to obtain MnTiO 3 Material. 2.27g MnTiO 3 material and 1.26 g LiOH H 2 O, and 0.3g sucrose with 30ml acetone as a dispersant, ball milled for 5h (rotation speed 500r / min). After the acetone is volatilized, it is transferred to a porcelain boat, placed in a tubular resistance furnace under the protection of Ar, heat-treated at 1050 °C for 3 h, and cooled naturally to room temperature to obtain Li 2 MnTiO 4 / C Composite. Will Li 2 MnTiO 4 / C composite material was heated in the air at 180°C for 10 hours, washed and filtered with water several times after cooling, and after the filtrate was neutral, it was dried at 120°C to obtain the Li 2-x MnTiO 4 / C Composite. In the total mass of thi...

Embodiment 2

[0033] 9.8g Mn(Ac) 2 4H 2 O and 3.2 g TiO 2 Add it to 40ml of ethanol, react in a sealed flask at 70°C for 12h, transfer it to an evaporating dish for drying at 120°C, and then transfer it to a tube-type resistance furnace, heat treatment at 700°C for 3h under nitrogen protection, and obtain MnTiO 3 Material. 2.27g MnTiO 3 material and 1.26 g LiOH H 2 O, and 1.5g of sucrose with 20ml of acetone as a dispersant, ball milled for 5h (rotation speed 500r / min). After the acetone is volatilized, it is transferred to a porcelain boat and placed in a tubular resistance furnace under the protection of N2, heat-treated at 900°C for 10h, and naturally cooled to room temperature to obtain the Li 2 MnTiO 4 / C Composite. Will Li 2 MnTiO 4 / C composite material was heated in the air at 160°C for 24 hours, washed and filtered with water several times after cooling, and after the filtrate was neutral, it was dried at 120°C to obtain the Li 2-x MnTiO 4 / C Composite. In the total mas...

Embodiment 3

[0035] 4.9g Mn(Ac) 2 4H 2 O and 6.8g Ti(OC 4 h 9 ) 4 Add it to 20ml of ethanol, react in a hydrothermal kettle at 150°C for 24h, transfer it to an evaporating dish for drying at 90°C, then transfer it to a tubular resistance furnace, and heat-treat it at 500°C for 5h under the protection of nitrogen to obtain MnTiO 3 Material. 2.27g MnTiO 3 material and 1.26 g LiOH H 2 O, and 1.5g of sucrose with 30ml of acetone as a dispersant, ball milled for 5h (rotation speed 500r / min). After the acetone is volatilized, it is transferred to a porcelain boat and placed in a tube resistance furnace under N 2 Under protection, heat treatment at 900°C for 10h, and naturally cool to room temperature, the Li 2 MnTiO 4 / C Composite. Will Li 2 MnTiO 4 / C composite material was heated in the air at 180°C for 10 hours, washed and filtered with water several times after cooling, and after the filtrate was neutral, it was dried at 120°C to obtain the Li 2-x MnTiO 4 / C Composite. In the ...

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Abstract

The invention relates to a manganese lithium titanate / carbon composite anode material for a rechargeable lithium battery and a preparation method thereof, and relates to an anode material. The invention provides a manganese lithium titanate / carbon composite anode material with good electrochemical activity for the rechargeable lithium battery and a preparation method thereof. The composite anode material is Li[2-x]MnTiO4 / C, wherein x is more than 0 and less than 1, titanate accounts for 98 to 85 percent, and composite carbon accounts for 2 to 15 percent. The preparation method comprises: mixing at least one among manganese salts such as manganous acetate, manganous carbonate and mangauous oxalate and at least one among titanium compounds such as n-butyl titanate and titanium dioxide in a water-alcohol system, drying the mixture after heating reaction, and performing heat treatment to obtain manganese metatitanic acid; mixing the manganese metatitanic acid and at least one among lithium compounds such as lithium acetate, lithium carbonate and lithium hydroxide, adding sugar into the mixture, and performing ball grinding and heat treatment to obtain a Li2MnTiO4 / C composite material; and heating the Li2MnTiO4 / C composite material, and performing chemical lithium removal, water washing and drying to obtain a product.

Description

technical field [0001] The present invention relates to a kind of positive pole material, relate to a kind of manganese lithium titanate lithium / carbon (Li 2-x MnTiO 4 / C, 0<x<1) composite positive electrode material and preparation method thereof. Background technique [0002] After more than 10 years of development, rechargeable lithium batteries (such as lithium-ion batteries, etc.) have been widely used in various portable electronic products, and are expected to become energy storage devices for electric vehicles and hybrid vehicles. The current commercial lithium-ion battery cathode materials are based on oxide cathode materials, especially layered LiCoO 2 Material-based. LiCoO 2 Cathode materials have disadvantages such as limited resources, high price, and unfriendly environment. However, almost all oxide cathode materials are strong oxidants in the charged state, and there are serious safety hazards in direct contact with the currently used organic electr...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/04
CPCY02E60/12Y02E60/10
Inventor 杨勇李益孝何冠男
Owner XIAMEN UNIV
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