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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  • Abstract
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  • Application Information

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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

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

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Example Embodiment

[0029] Example 1:

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

Example Embodiment

[0031] Example 2:

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

Example Embodiment

[0033] Example 3:

[0034] Weigh 10g of metatitanic acid powder and gradually add 300ml of LiOH aqueous solution with a concentration of 5mol / L under uniform stirring. After the dispersion is uniform, the temperature is gradually raised to 80°C, and the reaction is kept constant for 24h under uniform stirring. Then stop heating and cool down to room temperature by natural cooling. The sample was taken out and filtered, washed repeatedly with water to pH=7.5, and dried to obtain lithium titanyl oxide precursor powder. The prepared precursor powder is calcined at 700℃ for 3h 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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