Li4Ti5O12-TiN-TiC material and preparation method thereof

A metal and total mass technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as complicated preparation process and expensive medicines

Inactive Publication Date: 2019-03-15
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this method is complicated and the medicines used are expensive

Method used

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  • Li4Ti5O12-TiN-TiC material and preparation method thereof
  • Li4Ti5O12-TiN-TiC material and preparation method thereof
  • Li4Ti5O12-TiN-TiC material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] With 13.1g TiO 2 As the initial titanium source for the reaction, 4.88gLi 2 CO 3 As the initial lithium source for the reaction, 4% metallic titanium powder and 2% graphite powder were added, and in an agate mortar, TiO 2 and Li 2 CO 3 Use an agate grinding rod to mix evenly, then add graphite powder and metal titanium powder to the mixture in proportion, and then use a stainless steel medicine spoon to mix evenly, put the above materials into a tube furnace, 2 Under the protection of gas, calcined at the highest calcination temperature of 850°C for 6h to obtain Li 4 Ti 5 o 12 -TiN-TiC composite material.

Embodiment 2

[0024] With 13.1g TiO 2 As the initial titanium source for the reaction, 4.88gLi 2 CO 3 As the initial lithium source for the reaction, 3% metallic titanium powder and 1% graphite powder were added. In an agate mortar, TiO 2 and Li 2 CO 3 Use an agate grinding rod to mix evenly, then add graphite powder and metal titanium powder to the mixture in proportion, and then use a stainless steel medicine spoon to mix evenly, put the above materials into a tube furnace, 2 Under the protection of gas, under the condition of the highest calcination temperature of 900 ℃, calcined for 8h to obtain Li 4 Ti 5 o 12-TiN-TiC composite material.

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Abstract

The invention belongs to the field of a negative electrode material of a lithium ion battery in a chemical power supply, and particularly relates to a Li4Ti5O12-TiN-TiC material and a preparation method thereof. For solving the technical problem, the preparation method of the Li4Ti5O12-TiN-TiC material is provided. The method comprises the following steps: TiO2, Li2CO3, C and Ti are uniformly mixed to obtain a mixture; and the mixture is sintered at 850-900 DEG C in a nitrogen atmosphere so as to obtain the Li4Ti5O12-TiN-TiC material. The Li4Ti5O12-TiN-TiC material prepared by modifying Li4Ti5O12 in one step has better rate performance than that of the Li4Ti5O12.

Description

technical field [0001] The invention belongs to the field of negative electrode materials for lithium ion batteries in chemical power sources, in particular to Li 4 Ti 5 o 12 -TiN-TiC material and preparation method thereof. Background technique [0002] Lithium titanate (Li 4 Ti 5 o 12 ) as a lithium-ion battery anode material has the advantages of ultra-high safety, ultra-long cycle performance, and wide operating temperature, but there is also a higher operating voltage of 1.55V (vs. Li + / Li), lower theoretical capacity 175mAhg -1 , Gas is easy to be generated during use, and the high-rate performance is poor. Combined with the comprehensive analysis of lithium battery application fields, the following conclusions can be drawn: on the one hand, high lithiation voltage and low reversible capacity are not suitable as anode materials for 3C digital lithium-ion batteries; on the other hand, ultra-high safety, ultra-long Cyclic and wide operating temperature, it is mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485
CPCH01M4/364H01M4/485Y02E60/10
Inventor 孟伟巍闫蓓蕾
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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