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Method for preparing lithium ionic cell cathode material spinelle lithium titanate

A lithium-ion battery, lithium halite titanate technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of complex process, high cost, high temperature, high energy consumption, etc., and achieve cheap and easy raw materials, high yield High and simple preparation process

Inactive Publication Date: 2009-06-24
万向电动汽车有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is mainly aimed at high-temperature solid phase synthesis of Li 4 Ti 5 o 12 The shortcomings of high temperature, long time, and high energy consumption in the process of negative electrode materials and the shortcomings of complex and costly processes in the sol-gel synthesis process provide a method for preparing Li by low-temperature ion diffusion reaction. 4 Ti 5 o 12 material method

Method used

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  • Method for preparing lithium ionic cell cathode material spinelle lithium titanate
  • Method for preparing lithium ionic cell cathode material spinelle lithium titanate
  • Method for preparing lithium ionic cell cathode material spinelle lithium titanate

Examples

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Effect test

Embodiment 1

[0030] Weigh 5g of TiO 2 The powder was gradually added to 300ml of LiOH aqueous solution with a concentration of 10mol / L under the condition of uniform stirring, and after being uniformly dispersed, the temperature was gradually raised to 150°C, and the reaction was carried out at constant temperature for 24 hours under constant stirring. Then stop heating, and cool down to room temperature naturally. The sample was taken out, filtered, repeatedly washed with water until pH = 7.5, and dried to obtain lithium titanyl oxide precursor powder. The prepared precursor powder was calcined at 700 °C for 6 h to obtain the product Li 4 Ti 5 o 12 .

Embodiment 2

[0032] Weigh 5g of metatitanic acid powder, gradually add 300ml of LiOH aqueous solution with a concentration of 10mol / L under the condition of uniform stirring, gradually raise the temperature to 120°C after uniform stirring, and react at constant temperature for 12h under the condition of constant stirring. Then stop heating, and cool down to room temperature naturally. The sample was taken out, filtered, repeatedly washed with water until pH = 7.5, and dried to obtain lithium titanyl oxide precursor powder. The prepared precursor powder was calcined at 700 °C for 6 h to obtain the product Li 4 Ti 5 o 12 .

Embodiment 3

[0034] Weigh 10g of metatitanic acid powder, gradually add 300ml of LiOH aqueous solution with a concentration of 5mol / L under the condition of uniform stirring, gradually raise the temperature to 80°C after uniform dispersion, and react at constant temperature for 24 hours under constant stirring. Then stop heating, and cool down to room temperature naturally. The sample was taken out, filtered, repeatedly washed with water until pH = 7.5, and dried to obtain lithium titanyl oxide precursor powder. The prepared precursor powder was calcined at 700 °C for 3 h to obtain the product Li 4 Ti 5 o 12 .

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Abstract

The invention relates to a method for preparing an anode material of a lithium ion battery of spinel lithium titanate. The invention provides a method for preparing a Li4Ti5O12 material through a low-temperature ionic diffusion reaction, aiming at the drawbacks of a high-temperature solid-phase Li4Ti5O12 synthesis process of high temperature, long time and high energy consumption and the drawbacks of a sol-gel synthesis process of complex process and higher cost. The method adopts a technical proposal that: titanium dioxide or metatitanic acid is uniformly dispersed in 1 to 20mol / L aqueous solution of LiOH, wherein the Lithium to Titanium ratio is (10-100):1; under a condition of uniform stirring, the mixed solution is heated to 60 to 150 DEG C to react for 6 to 72 hours; the obtained products are washed till the pH is equal to 7 to 8, filtered and dried to form a precursor of Lithium-titanium oxide precursor; and the prepared precursor is roasted at 500 to 800 DEG C for 3 to 12 hours to form the final product of Li4Ti5O12.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material and a preparation method thereof, in particular to a preparation method for the lithium ion battery negative electrode material spinel lithium titanate. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, high working voltage, long cycle life, no memory effect, safety and pollution-free, and are currently widely used in portable communication equipment, aerospace, space military, energy storage facilities and other fields. At present, the rapid development of portable electronic equipment, EV (electric vehicle), HEV (hybrid electric vehicle) and space technology has put forward higher requirements for secondary batteries in terms of specific capacity, cycle life, and safety. Improving and improving the electrochemical performance of batteries can start from many aspects such as electrode materials and electrolytes. [0003] At pr...

Claims

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Application Information

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IPC IPC(8): C01G23/00H01M4/58
Inventor 李明刘昊邓龙征
Owner 万向电动汽车有限公司
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