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Method for preparing titanium substrate/titanium spherical composite lithium-ion battery negative electrode material by one-step method

A technology for ion batteries and negative electrode materials, which can be applied to battery electrodes, circuits, electrical components, etc., and can solve problems such as potential safety hazards

Inactive Publication Date: 2016-10-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the anode materials widely used in lithium batteries are carbon materials such as graphite, but in the process of charging and discharging, the relatively low potential of lithium will form a solid electrolyte film, and there will be the formation of lithium dendrites, making this type of lithium ion battery exist. Significant safety hazards, while titanium-based materials such as Li 4 Ti 5 o 12 、TiO 2 As a negative electrode material, the charge and discharge voltage can be controlled above 1V, which can effectively inhibit the growth of the SEI film and improve the safety performance of the battery.

Method used

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  • Method for preparing titanium substrate/titanium spherical composite lithium-ion battery negative electrode material by one-step method
  • Method for preparing titanium substrate/titanium spherical composite lithium-ion battery negative electrode material by one-step method
  • Method for preparing titanium substrate/titanium spherical composite lithium-ion battery negative electrode material by one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve 0.5 parts by mass of cetylamine in 100 parts by volume of analytical ethanol, stir at room temperature for 30 minutes, add 1 volume part of concentrated ammonia water, add 2 volume parts of isopropyl titanate under vigorous stirring, and add 50 volume parts of distilled water (Containing 0.03 parts by mass of LiOH·H 2 O) The reaction solution was moved to a 200ml reactor, and reacted for 12h at 100°C.

[0021] (2) After the kettle was cooled to room temperature, a white precipitate was obtained by centrifugation and washing. Dry the white samples.

[0022] (3) The dried samples were calcined at 500°C for 2h.

Embodiment 2

[0024] (1) Dissolve 1 part by mass of cetylamine in 100 parts by volume of analytical ethanol, stir for 30 minutes at room temperature, add 1.2 parts by volume of concentrated ammonia water, add 2.5 parts by volume of isopropyl titanate under vigorous stirring, and add 50 parts by volume of distilled water (Containing 0.03 parts by mass of LiOH·H 2 O) the reaction solution was moved to a 200ml reactor, and reacted at 120 degrees for 48h.

[0025] (2) After the kettle was cooled to room temperature, a white precipitate was obtained by centrifugation and washing. Dry the white samples.

[0026] (3) The dried samples were calcined at 600°C for 2h.

Embodiment 3

[0028] (1) Dissolve 1.5 parts by mass of cetylamine in 100 parts by volume of analytical ethanol, stir for 30 minutes at room temperature, add 1.2 parts by volume of concentrated ammonia water, add 2 parts by volume of isopropyl titanate under vigorous stirring, and add 50 parts by volume of distilled water (Containing 0.13 parts by mass of LiOH·H 2 O) the reaction solution was moved to a 200ml reactor, and reacted for 24h at 200°C.

[0029] (2) After the kettle was cooled to room temperature, a white precipitate was obtained by centrifugation and washing. Dry the white samples.

[0030] (3) Calcinate the dried sample at 500-800 degrees for 2 hours.

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Abstract

The invention discloses a method for preparing a negative electrode material of a titanium substrate / titanium spherical composite lithium ion battery by a one-step method. The method comprises the following steps: dissolving 0.5-3 mass parts of hexadecylamine into 100 volume parts of ethyl alcohol, adding 0.5-2 volume parts of strong ammonia water and 1-3 mass parts of titanium isopropoxide, adding 50 volume parts of distilled water containing 0.03-1 mass part of LiOH.H2O, moving a reaction liquid into a reaction kettle, reacting at 100-300 DEG C for 1-48 hours, cooling the kettle to room temperature, centrifuging and washing so as to obtain white precipitates, and drying the white sample; and forging the dried sample at 500-800 DEG C for 2 hours. The titanium substrate / titanium spherical composite material is synthesized successfully, and is applied to the negative electrode of a lithium ion battery, is charged and discharged for 500 times with the current density of 3500mA / g, and after cycling, the capacity is still above 100mAh / g.

Description

technical field [0001] The invention relates to battery negative electrode materials in the field of electrochemistry, and more specifically relates to a method for preparing sheet / spherical negative electrode materials that can be used for fast charging and discharging. Background technique [0002] Energy is one of the three pillars of world economic development in the 21st century. With the development of economy and society, traditional fossil combustion tends to be exhausted, and it is a general trend to find new energy sources to replace traditional energy sources such as oil that pollute the environment. In recent years, lithium-ion batteries have developed rapidly and have many advantages. At present, most of the anode materials widely used in lithium batteries are carbon materials such as graphite, but in the process of charging and discharging, the relatively low potential of lithium will form a solid electrolyte film, and there will be the formation of lithium de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1395
CPCH01M4/1395Y02E60/10
Inventor 单忠强朱坤磊田建华
Owner TIANJIN UNIV