Process for producing nanostructured tin dioxide lithium ion battery negative pole material

A lithium-ion battery, nanostructure technology, applied in tin oxide, battery electrodes, structural parts, etc., can solve the problems of troublesome synthesis process, low product yield, damage to oxide structure, etc., and achieves simple preparation process and low equipment requirements. , the effect of complete structure

Inactive Publication Date: 2009-05-13
JILIN UNIV
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  • Application Information

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Problems solved by technology

At present, the synthesis methods of tin-based oxides with hollow structure mainly include solvothermal method, template method, etc., but these methods have some shortcomings.
The oxide structure prepared by the solvothermal method is unpredictable, and some organic solvents are needed, and the waste liquid will pollute the environment
The synthesis process of the template method is complicated, the synthesis process of the template material is cumbersome, it takes too long, the product yield is low and the template agent is needed, and the oxide structure is easy to be destroyed during the template removal process
[0004] At present, there is no effective method to effectively control the internal structure and size of tin dioxide hollow microspheres. Therefore, seeking an effective and controllable method for synthesizing hollow tin dioxide microspheres has great significance for the development of tin-based negative electrode materials. the role of

Method used

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  • Process for producing nanostructured tin dioxide lithium ion battery negative pole material
  • Process for producing nanostructured tin dioxide lithium ion battery negative pole material
  • Process for producing nanostructured tin dioxide lithium ion battery negative pole material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 2.25g SnCl 2 2H 2 O and 3.2 g of resorcinol were dissolved in 30 ml of deionized water, stirred evenly, then 7.0 mL of 36 wt% formaldehyde solution was added within 5 seconds, vigorously stirred for 25 seconds, and the mixed solution was transferred to a 45 mL Teflon-lined stainless steel reaction kettle, then reacted in an oven at 85°C for 48h, cooled naturally to room temperature, filtered and washed the obtained intermediate product until the pH value was 7, and then dried at 80°C. Finally, the intermediate product was placed in a tube furnace and calcined in air at 550°C for 4 hours to obtain tin dioxide microspheres with a core-shell structure. The size of the microspheres was about 2 μm, and the size of the solid core was 1.5 μm.

Embodiment 2

[0038] The experimental method was the same as in Example 1, except that 0.5 mL of hydrochloric acid with a concentration of 37 wt % was added, and tin dioxide microspheres with a core-shell structure were also obtained. The size of the microspheres was about 2 μm, and the size of the solid core was 0.8 μm.

Embodiment 3

[0040] The experimental method is the same as in Example 1, except that 1.0 mL of hydrochloric acid with a concentration of 37 wt % is added to obtain tin dioxide microspheres with a hollow structure, and the size of the microspheres is about 2 μm.

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Abstract

The invention belongs to the preparation field of the anode material of a lithium ion battery, and in particular relates to a method for preparing metal oxide electrode material with a nanometer structure by utilizing the in-situ synthesis method. The internal structure and the dimension of a hollow micro-sphere obtained are controlled through adjusting the pH value of a system by utilizing hydrochloric acid. Raw materials in the invention are common and are easy to obtain; an organic solvent is not required during the preparation process; the preparation process is simple; the synthesis of template materials and the participation of a surface active agent are not required during the synthetic process; the requirements to the device are low, the time consumption is less and the preparation process is simple; and a main by-product during the preparation process is water and carbon dioxide and is environment-friendly. The raw materials used in the invention are common; and the preparation conditions are not restricted by areas. The hollow tin dioxide micro-spheres have higher application prospect in the filed of electrode material, catalyst carriers and the like. The method has the advantages of cheap and easily obtained raw materials, simple preparation process, and unrestricted preparation conditions by areas, and is suitable for massive industrial production.

Description

technical field [0001] The invention belongs to the field of lithium ion battery negative electrode material preparation, and in particular relates to a method for preparing a metal oxide battery negative electrode material with a nanometer structure by using an in-situ synthesis method. Background technique [0002] Due to the limited reserves of fossil energy in the world and the increasingly serious environmental pollution problems, people gradually began to develop and utilize new, abundant and cheap energy sources. Due to its high output voltage, large battery capacity, long service life and wide operating temperature, lithium-ion batteries are widely used in modern society, and the development trend is getting better and better . However, with the continuous development of society, the requirements for the capacity of lithium-ion batteries are also getting higher and higher. The capacity of lithium-ion batteries mainly depends on the capacity of the positive and nega...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02H01M4/48
CPCY02E60/12Y02E60/10
Inventor 陈接胜张锋李国栋
Owner JILIN UNIV
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