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Method for preparing whisker shaped lithium titanate (Li4Ti5O12) by low-temperature solid phase method

A technology of lithium titanate and solid-phase method, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as high energy consumption, and achieve the effects of energy saving, easy control of appearance, and easy control of size

Inactive Publication Date: 2012-08-29
镇江市迪博新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the method disclosed in patent 200610022477.5 can obtain whisker-like lithium titanate by using high-temperature solid-phase method, but the preparation process requires high-temperature treatment at 980-1050 degrees
Almost all the solid-phase methods reported so far involve high-temperature roasting at about 800 degrees, which requires a lot of energy consumption.

Method used

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  • Method for preparing whisker shaped lithium titanate (Li4Ti5O12) by low-temperature solid phase method
  • Method for preparing whisker shaped lithium titanate (Li4Ti5O12) by low-temperature solid phase method
  • Method for preparing whisker shaped lithium titanate (Li4Ti5O12) by low-temperature solid phase method

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Embodiment 1

[0027] TiO 2 (B) Whiskers and LiOH, by TiO 2 / Li 2 O=0.9 (mol ratio) preparation, TiO 2 (B) The diameter of the whiskers is 50nm~100nm, the aspect ratio is 5~10, mix evenly with a high-speed mixer; mix the raw material TiO 2 (B) Dehydrate LiOH and LiOH in a vacuum oven at 60-100°C for 0.5-2 hours, then granulate the dehydrated raw materials; place the granulated raw materials in a muffle furnace and roast at 200°C After 5 hours, the primary roasted product was obtained; then the temperature was raised to 650 °C at a heating rate of 5 °C / min, and roasted for 2 hours to obtain a white and loose secondary roasted product; the secondary roasted product was washed with water and dried Obtain whisker-like Li with a diameter of about 50nm~100nm and an aspect ratio of 5~10 4 Ti 5 o 12 .

[0028]

Embodiment 2、3

[0030] with TiO 2 (B) Whiskers are the source of titanium, TiO 2 (B) The diameter of the whiskers is 300-500nm, and the aspect ratio is 15-20; Lithium acetate dihydrate is used as the lithium source, and lithium titanate is prepared in the same manner as in Example 1. The specific conditions and product characteristics are shown in Table 1 .

[0031]

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Abstract

The invention discloses a method for preparing whisker shaped lithium titanate (Li4Ti5O12) by a low-temperature solid phase method. A TiO2(B) whisker and a lithium salt serve as raw materials; after being mixed, the TiO2(B) whisker and the lithium salt are baked twice at the temperature of 200 to 350 DEG C and the temperature of 500 to 650 DEG C respectively; after a product which is formed by baking twice is washed by water and dried, the whisker shaped lithium titanate is obtained. According to the method, the TiO2(B) whisker serves as a titanium source for synthesizing the Li4Ti5O12 for the first time, and the obtained product is the whisker shaped Li4Ti5O12 which is 50 to 500nm in diameter and 5 to 20 in length-diameter ratio and has the characteristics of easy control in size, uniformity in shape and the like. The process has the advantages of low baking temperature, low energy consumption, suitability for industrial application and the like.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic non-metallic materials, and in particular relates to a method for preparing whisker-shaped lithium titanate by a low-temperature solid-phase method. Background technique [0002] Lithium titanate material (Li 4 Ti 5 o 12 ) as a negative electrode material for lithium-ion batteries is a "zero-strain material". Compared with carbon materials that have been commercialized, it has the characteristics of high safety, high stability, long life and environmental protection. The anode material of a generation of lithium-ion batteries is widely used in new energy vehicles, electric motorcycles and applications requiring high safety, high stability and long cycle. It has been reported in the literature that the nanonization of lithium titanate helps to improve its capacitance at high discharge rates. [0003] We know that nanomaterials with different morphologies are closely related to their prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485
CPCY02E60/10
Inventor 姚文俊王昌松施容华
Owner 镇江市迪博新材料科技有限公司