Method for preparing composite material containing tin dioxide nano-particles attached to honeycomb carbon

A nanoparticle, tin dioxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as shedding, battery performance degradation, active material pulverization, etc., to improve electrical conductivity. , the effect of increasing electrical conductivity and improving electrochemical performance

Inactive Publication Date: 2017-05-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the alloying reaction, SnO 2 Huge volume expansion (about 400%) occurs during the electrochemical reaction, which causes the active material to pulverize and fall off, resulting in a decrea

Method used

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  • Method for preparing composite material containing tin dioxide nano-particles attached to honeycomb carbon
  • Method for preparing composite material containing tin dioxide nano-particles attached to honeycomb carbon
  • Method for preparing composite material containing tin dioxide nano-particles attached to honeycomb carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1). Add 0.025mol of SnCl 4 ·5H 2 Add O into 100mL deionized water, stir and mix evenly with a magnet;

[0031] 2). Take 0.4g of honeycomb carbon with a pore size of less than 5 μm and add it to the 80mL SnCl obtained in step 1) 4 ·5H 2 O solution and sonicated;

[0032] 3). Take an appropriate amount of the precursor solution obtained in step 2 and transfer it to the lining of a polytetrafluoroethylene hydrothermal reaction kettle with a capacity of 100mL. The stainless steel reaction kettle is sealed and heated in an oven to 170°C and kept for 36 hours;

[0033] 4). After the reaction, cool to room temperature at room temperature, take out the reactant, wash with deionized water and ethanol three times, and dry at 60°C for 12 hours to obtain a dry product;

[0034] 5). Anneal the dried product obtained in step 4 under an argon atmosphere, set the heating rate to 5°C / min, keep it at 600°C for 200 minutes, and then cool it down to room temperature naturally to obtain...

Embodiment 2

[0037] 1). Add 0.05mol of SnCl 4 ·5H 2 Add O into 100mL deionized water, stir and mix evenly with a magnet;

[0038] 2). Take 0.5g of honeycomb carbon with a pore size of less than 5 μm and add it to the 80mL SnCl obtained in step 1) 4 ·5H 2 O solution and sonicated;

[0039] 3). Take an appropriate amount of the precursor solution obtained in step 2 and transfer it to the lining of a polytetrafluoroethylene hydrothermal reaction kettle with a capacity of 100mL. The stainless steel reaction kettle is sealed and heated in an oven to 180°C for 24 hours;

[0040] 4). After the reaction, cool to room temperature at room temperature, take out the reactant, wash with deionized water and ethanol for 4 times, and dry at 70°C for 10 hours to obtain a dry product;

[0041] 5). Anneal the dried product obtained in step 4 under an argon atmosphere, set the heating rate to 8°C / min, keep it at 625°C for 160min, and then cool it down to room temperature naturally to obtain a honeycomb ca...

Embodiment 3

[0044] 1). Add 0.1mol of SnCl 4 ·5H 2 Add O into 100mL deionized water, stir and mix evenly with a magnet;

[0045] 2). Take 0.6g of honeycomb carbon with a pore size of less than 5 μm and add it to the 80mL SnCl obtained in step 1) 4 ·5H 2 O solution and sonicated;

[0046] 3). Take an appropriate amount of the precursor solution obtained in step 2 and transfer it to the lining of a polytetrafluoroethylene hydrothermal reaction kettle with a capacity of 100mL. The stainless steel reaction kettle is sealed and heated in an oven to 190°C for 12 hours;

[0047] 4). After the reaction, cool to room temperature at room temperature, take out the reactant, wash with deionized water and ethanol for 5 times, and dry at 80°C for 8 hours to obtain a dry product;

[0048] 5). Anneal the dried product obtained in step 4 under an argon atmosphere, set the heating rate to 10°C / min, keep it at 650°C for 120min, and then cool it down to room temperature naturally to obtain a honeycomb car...

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Abstract

The invention relates to a method for preparing a composite material containing tin dioxide nano-particles attached to honeycomb carbon. The method comprises the steps of preparing SnCl4.5H2O solution during magnetic stirring; adding honeycomb carbon into the SnCl4.5H2O solution, and performing ultrasonic treatment; transferring the obtained precursor mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle lining, heating and reacting; then washing, drying, and annealing in an argon atmosphere, thus obtaining the composite material containing tin dioxide nano-particles attached to honeycomb carbon. The material is composed of SnO2 nano-particles and honeycomb carbon, wherein the SnO2 nano-particles grow in the holes of the honeycomb carbon, so that the electric conductivity of the material is improved and the volume expansion of SnO2 in the electrochemical reaction process is borne; and the electrochemical performance of the SnO2 serving as a nano lithium battery cathode material is effectively improved.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic nanometer materials. Specifically, it relates to a method for preparing a composite material with tin dioxide nanoparticles attached to honeycomb carbon by changing the reaction conditions in the experiment. Background technique [0002] With the extensive application of lithium-ion batteries, the demand for lithium has greatly increased, but lithium resources are limited and unevenly distributed (mainly in the Americas), which makes the development of new energy storage batteries a strategic requirement. The physical and chemical properties of sodium ions and lithium ions are similar, and sodium resources are abundant, widely distributed, and cheap, which makes sodium-ion batteries have great potential to become a strategic substitute for lithium-ion batteries and has attracted the attention of many researchers. [0003] Since the most widely used anode materials in lithium-ion batteries do...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/48H01M4/625H01M10/054H01M2004/021Y02E60/10
Inventor 孙晓红李鑫胡旭东郑春明
Owner TIANJIN UNIV
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