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SnO2/CMK-3 nanometer composite lithium-ion battery negative electrode material preparation method

A CMK-3, lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as cycle performance degradation, and achieve the effects of simple processing technology, improved electrochemical cycle performance, and low raw materials

Inactive Publication Date: 2015-06-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a huge volume change occurs during the Li-Sn alloying / dealloying process, causing pulverization of the electrode material and a sharp drop in cycle performance.

Method used

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  • SnO2/CMK-3 nanometer composite lithium-ion battery negative electrode material preparation method
  • SnO2/CMK-3 nanometer composite lithium-ion battery negative electrode material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Weigh 2g of template agent P 123 , dissolved in 60mL of 2mol / L hydrochloric acid solution at 35°C, then added 4.4mL of tetraethyl orthosilicate (TEOS) and 15mL of distilled water, continued to stir for 5-12h, and transferred the solution to the reaction kettle. After hydrothermal aging at 120°C for 24 hours, after washing, filtering and drying, the 2 Carbonization under protection, rising from room temperature to 550°C, maintaining the temperature for 5 hours, and cooling down to room temperature naturally after calcination, to obtain SBA-15.

[0018] (2) Weigh 1g of SBA-15 into a solution containing 1.25g of sucrose, 0.14g of concentrated sulfuric acid, and 5mL of distilled water, heat at 100°C and 160°C for 6h, and then add 0.8g of sucrose, 0.09g of concentrated Sulfuric acid and 5g of distilled water were heated at 100°C and 160°C for 6h respectively, and then 2 Carbonization at 877°C for 6h in protection. After carbonization and grinding, the template was rem...

Embodiment 2

[0021] (1) Weigh 2g of template agent P 123 , dissolved in 60mL of 2mol / L hydrochloric acid solution at 35°C, then added 4.4mL of tetraethyl orthosilicate (TEOS) and 15mL of distilled water, continued to stir for 5-12h, and transferred the solution to the reaction kettle. After hydrothermal aging at 120°C for 24 hours, after washing, filtering and drying, the 2 Carbonization under protection, rising from room temperature to 550°C, maintaining the temperature for 5 hours, and cooling down to room temperature naturally after calcination, to obtain SBA-15.

[0022] (2) Weigh 1g of SBA-15 into a solution containing 1.25g of sucrose, 0.14g of concentrated sulfuric acid, and 5mL of distilled water, heat at 100°C and 160°C for 6h, and then add 0.8g of sucrose, 0.09g of concentrated Sulfuric acid and 5g of distilled water were heated at 100°C and 160°C for 6h respectively, and then 2 Carbonization at 877°C for 6h in protection. After carbonization and grinding, the template was rem...

Embodiment 3

[0025] (1) Weigh 2g of template agent P 123 , dissolved in 60mL of 2mol / L hydrochloric acid solution at 35°C, then added 4.4mL of tetraethyl orthosilicate (TEOS) and 15mL of distilled water, continued to stir for 5-12h, and transferred the solution to the reaction kettle. After hydrothermal aging at 120°C for 24 hours, after washing, filtering and drying, the 2Carbonization under protection, rising from room temperature to 550°C, maintaining the temperature for 5 hours, and cooling down to room temperature naturally after calcination, to obtain SBA-15.

[0026] (2) Weigh 1g of SBA-15 into a solution containing 1.25g of sucrose, 0.14g of concentrated sulfuric acid, and 5mL of distilled water, heat at 100°C and 160°C for 6h, and then add 0.8g of sucrose, 0.09g of concentrated Sulfuric acid and 5g of distilled water were heated at 100°C and 160°C for 6h respectively, and then 2 Carbonization at 877°C for 6h in protection. After carbonization and grinding, the template was remo...

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Abstract

The present invention discloses a SnO2 / CMK-3 nanometer composite lithium-ion battery negative electrode material preparation method, and belongs to the technical field of chemical power supplies. According to the present invention, a copolymer P123 is adopted as a template agent and tetraethyl orthosilicate (TEOS) is adopted as a silicon source to carry out hydrothermal synthesis of a mesoporous molecular sieve SBA-15, the SBA-15 is adopted as a template and sucrose is adopted as a carbon source to synthesize an ordered mesoporous carbon material CMK-3, and an ultrasonic chemical method is used to load SnO2 nanoparticles into the pore channel of the ordered mesoporous carbon material CMK-3 so as to obtain the SnO2 / CMK-3 nanoparticle negative electrode material; with the prepared SnO2 / CMK-3 nanometer composite lithium-ion battery negative electrode material of the present invention, the great volume change of the SnO2 during the charging and discharging process is released, the stability of the electrode is maintained, the reversible capacity is increased, and the electrochemical cycle performance is improved; and the preparation method of the present invention has characteristics of simple process, cheap and easily available raw materials, and efficient, energy-saving and non-polluting processing process.

Description

technical field [0001] The present invention relates to a kind of SnO 2 The invention discloses a preparation method of CMK-3 nanocomposite lithium ion battery negative electrode material, which belongs to the technical field of chemical power supply. Background technique [0002] At present, the global pursuit of building a sustainable energy system reduces the dependence on fossil fuels on the one hand and reduces greenhouse gas emissions on the other hand. The strategic direction of these initiatives is to develop sustainable means of transport (such as electric vehicles) and to increase the ability to use renewable energy sources such as solar and wind power. But due to the intermittent nature of production and consumption demands, this requires powerful storage capacity to improve energy utilization, and only advanced battery technology can be expected to achieve this kind of storage capacity. Compared with other storage technologies, lithium-ion battery technology ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1397H01M4/583
CPCH01M4/1397H01M4/362H01M4/583H01M10/0525Y02E60/10
Inventor 乔辉罗磊陈克李大伟魏取福黄锋林
Owner JIANGNAN UNIV
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