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Preparation method for LiTiO/C compound electrode material

A composite electrode and compound technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve problems such as poor electronic conductivity, and achieve the effects of less reaction energy consumption, improved rate performance, and regular morphology

Inactive Publication Date: 2009-11-25
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] For Li 4 Ti 5 o 12 The problem of the poor electronic conductivity of the material itself, the purpose of the present invention is to propose a Li 4 Ti 5 o 12 The preparation method of / C composite electrode can prepare Li with good high rate charge and discharge performance 4 Ti 5 o 12 / C composite electrode material to improve the electronic conductivity of the material

Method used

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  • Preparation method for LiTiO/C compound electrode material
  • Preparation method for LiTiO/C compound electrode material
  • Preparation method for LiTiO/C compound electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 7.62g analytical pure Li 2 CO 3 , and then weigh 20.00g of rutile TiO according to Li:Ti=4.12:5 2 , after mixing the two, put them into a PTFE ball mill tank, ball mill and mix them in an anhydrous ethanol medium for 2 hours, and then put them into a vacuum drying oven for 8 hours at 120°C.

[0038] Put it in a high-temperature resistance furnace in a crucible, carry out pre-firing reaction under air conditions, control the heating rate at 5°C / min, raise the temperature to 650°C for 6 hours, and cool to room temperature with the furnace to obtain the mesophase product.

[0039] Press Li 4 Ti 5 o 12 The target carbon content in the / C composite material is 2wt%, add 0.46g of starch respectively, ball mill and mix in anhydrous ethanol medium for 2h, and then put it into a vacuum drying oven for 8h at 120°C. After drying in an atmosphere furnace in N 2 Under a protective atmosphere, raise the temperature to 800 ° C for 6 hours, and then cool with the furnace. ...

Embodiment 2

[0048] Weigh 7.62g analytical pure Li 2 CO 3 , and then weigh 20.00g of amorphous TiO according to Li:Ti=4.12:5 2 , after mixing the two, put them into a PTFE ball mill jar, ball mill and mix them in isopropanol medium for 2 hours, and then put them into a vacuum drying oven for 8 hours at 120°C.

[0049] Put it in a high-temperature resistance furnace in a crucible, carry out pre-firing reaction under air conditions, control the heating rate at 5°C / min, raise the temperature to 650°C for 6 hours, and cool to room temperature with the furnace to obtain the mesophase product.

[0050] Press Li 4 Ti 5 o 12 The target carbon content in the / C composite material is 3wt%, adding 0.69g of glucose, ball milling and mixing in isopropanol medium for 2h, and then drying in a vacuum oven at 120°C for 8h. After drying in an atmosphere furnace in N 2 Under a protective atmosphere, raise the temperature to 800 ° C for 8 hours, and then cool with the furnace. The resulting product is ...

Embodiment 3

[0054] Weigh 7.62g analytical pure Li 2 CO 3 , and then weigh 20.00g anatase TiO according to Li:Ti=4.12:5 2 , after mixing the two, put them into a PTFE ball mill jar, ball mill and mix them in isopropanol medium for 2 hours, and then put them into a vacuum drying oven for 8 hours at 120°C.

[0055] Put it in a high-temperature resistance furnace in a crucible, carry out pre-firing reaction under air conditions, control the heating rate at 5°C / min, raise the temperature to 680°C for 6 hours, and cool to room temperature with the furnace to obtain the mesophase product.

[0056] Press Li 4 Ti 5 o12 The target carbon content in the / C composite material is 2wt%, adding 0.46g of glucose, ball milling and mixing in isopropanol medium for 2h, and then drying in a vacuum oven at 120°C for 8h. After drying, the temperature was raised to 900°C for 6 hours in an atmosphere furnace under an argon protective atmosphere, and then cooled with the furnace. The resulting product is Li ...

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Abstract

The invention discloses a preparation method for Li4Ti5O12 / C compound electrode material, using a solidifying phase reacting method of low temperature presintering firstly and further high temperature roasting. The method comprises following steps: (1) preparing compound containing Ti and inorganic lithium salts in a certain ratio, mixing and performing ball grinding in an organic solvent medium; (2) in the air atmosphere, increasing temperature to 300-700 DEG C and after keeping the temperature for 2-8h, cooling the mixture to the constant temperature with the furnace to obtain the intermediate product; (3) mixing and performing ball grinding on the intermediate product and carbon source; under the protection of inert gas atmosphere, increasing temperature to 780-950 DEG C and keeping the temperature for 2-20h, then cooling the mixture with the furnace to obtain the Li4Ti5O12 / C compound electrode material. The invention has low preparation cost and a characteristic easy to achieve scale production; the synthesized sample has a regular appearance and a stable structure, having high charging-discharging multiplying power and a great circulation performance, which can be used as the electrode material of super capacitor, lithium ion battery or super capacitor battery.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a lithium ion battery used as a lithium ion battery, a super capacitor or a super capacitor battery. 4 Ti 5 o 12 / C composite electrode material preparation method. Background technique [0002] In today's world, oil resources are becoming increasingly scarce and environmental pollution is becoming more and more serious, forcing countries to strive for new sustainable energy sources. With the increasing demand for energy storage systems with high power density and wide temperature range in practical applications such as aerospace, national defense, transportation, electronic information and instrumentation, especially electric vehicles, lithium-ion batteries, supercapacitors or supercapacitors Green energy storage devices represented by batteries have become the focus of current attention. The performance and preparation process of electrode materials...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/58H01M4/62H01M16/00H01G9/042
CPCY02E60/12Y02E60/13Y02E60/10
Inventor 张治安李劼赖延清高宏权王姣丽
Owner CENT SOUTH UNIV
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