Stannic oxide nanotubes with high electrical properties and preparation method therefor

A technology of tin dioxide and electrical properties, applied in the direction of tin oxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem that the battery cycle performance and battery capacity cannot meet the needs of industrial applications, cannot reach industrial applications, The problem of battery specific capacity attenuation, etc., achieves the effect of superior battery performance, good rate charge-discharge cycle performance, and good product batch performance.

Active Publication Date: 2016-04-13
江苏先进无机材料研究院
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Problems solved by technology

This preparation method has tedious preparation steps and harsh conditions, but whether it is for SnO 2 battery capacity or cycle efficiency, its performance improvement is very limited and cannot reach the level of industrial applications; another method is to prepare nanoscale SnO 2 , currently preparing SnO 2 Most of the methods are concentrated in the preparation of hydrothermal method, need to add L-lysine (patent number: 200910084901.2), N-methylimidazole (Nanoscale, 2013, 5, 3262) (the first charge and discharge specific capacity is 1898 and 1241mAh/g , after 60 cycles, the spec

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  • Stannic oxide nanotubes with high electrical properties and preparation method therefor
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  • Stannic oxide nanotubes with high electrical properties and preparation method therefor

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preparation example Construction

[0033] The invention provides a method for preparing a tin dioxide hollow tube with high electrical performance, the steps of the method are as follows:

[0034] A) adopting the method for preparing silica hollow tubes (nanotubes) in the early stage;

[0035] a, adopt the method for preparing the sodium chloride crystal of nano-cubic appearance in the early stage, prepare the sodium chloride glycerin solution that concentration is 2.0M, add the sodium chloride glycerin solution of 0.5ml in the 100ml isopropanol solution, at normal temperature ( 25°C) for 5 minutes;

[0036] b. Add a certain amount of tetraethyl orthosilicate (TEOS) 2.0ml, ammonia water (NH4OH) 1.0m and water 5ml into the solution in step a twice, and react at room temperature (25°C) for a total of 8 hours;

[0037] c, add dropwise the deionized water of 10ml in the solution of step b;

[0038] d, centrifuging the solution obtained in step c, washing with ethanol, and then centrifuging again, repeating this s...

Embodiment 1

[0054] 1) Adopt the method of preparing silica hollow tube in the early stage

[0055] a, adopt the method for preparing the sodium chloride crystal of nano-cubic shape in the early stage, prepare the sodium chloride glycerol solution that concentration is 2.0M, add the sodium chloride glycerol solution of 0.5ml in the 100ml isopropanol solution, at normal temperature ( 25°C) for 5 minutes;

[0056] b. Add a certain amount of tetraethyl tetrasilicate (TEOS) 2.0ml, ammonia water (NH4OH) 1.0m and water 5ml into the solution of step a twice, and react at room temperature (25°C) for a total of 8 hours; c , add dropwise the deionized water of 10ml in the solution of step b;

[0057] d, centrifuging the solution obtained in step c, washing with ethanol, and then centrifuging again, repeating this several times;

[0058] e, drying the powder obtained in step d in an oven at a temperature of 100°C and 300°C for 3 hours to obtain silica nanotubes;

[0059] 2) Take a certain mass of ...

Embodiment 2

[0072] 1) Adopt the method of preparing silica hollow tube in the early stage

[0073] a, adopt the method for preparing the sodium chloride crystal of nano-cubic shape in the early stage, prepare the sodium chloride glycerol solution that concentration is 2.0M, add the sodium chloride glycerol solution of 0.5ml in the 100ml isopropanol solution, at normal temperature ( 25°C) for 5 minutes;

[0074] b. Add a certain amount of tetraethyl tetrasilicate (TEOS) 2.0ml, ammonia water (NH4OH) 1.0m and water 5ml into the solution of step a twice, and react at room temperature (25°C) for a total of 8 hours; c , add dropwise the deionized water of 10ml in the solution of step b;

[0075] d, centrifuging the solution obtained in step c, washing with ethanol, and then centrifuging again, repeating this several times;

[0076] e, drying the powder obtained in step d in an oven at a temperature of 100°C and 300°C for 3 hours to obtain silica nanotubes;

[0077] 2) Take a certain mass of ...

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Abstract

The invention relates to stannic oxide nanotubes with high electrical properties and a preparation method therefor. The method comprises the steps: (1) preparing a first mixed solution containing silicon dioxide nanotubes and/or titanium dioxide nanotubes, an alcoholic solution, a tin salt and urea; (2) subjecting the first mixed solution to a reaction in a hydrothermal reactor; (3) carrying out centrifugal separation on the reacted first mixed solution, so as to obtain a first sediment; (4) calcining the first sediment; (5) putting the calcined first sediment in a strongly alkaline solution, so as to obtain a second mixed solution; and (6) carrying out centrifugal separation on the second mixed solution so as to obtain a second sediment, washing the second sediment, and carrying out drying, thereby obtaining the stannic oxide nanotubes with high electrical properties.

Description

technical field [0001] The invention belongs to the field of nano functional materials, in particular to a tin dioxide nanotube with high electrical performance and a preparation method thereof. Background technique [0002] The rapid development of new high-energy power supply technology has put forward higher requirements for lithium-ion battery electrode materials. Lithium-ion battery electrode materials with high energy density, high power density, and good charge-discharge cycle characteristics are the focus of scientists' current research. At present, carbon materials (graphene, amorphous carbon, etc.) are the main anode materials for commercial lithium-ion batteries. However, the lithium storage capacity of carbon materials is low (theoretical capacity of graphene is 372mAh / g), which limits the further improvement of lithium-ion battery capacity. Tin dioxide (SnO 2 ) as the negative electrode material of lithium ion battery, its theoretical capacity is 790mAh / g, fa...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 金平实王兵兵纪士东
Owner 江苏先进无机材料研究院
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