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Preparation method of porous carbon-coated antimony telluride nanosheet and application thereof as negative electrode material of metal ion battery

A technology of antimony telluride nanometers and nanosheets, which is applied in the field of nanomaterials, can solve problems such as volume expansion, shape destruction, and batteries that cannot have cycle performance, and achieve improved ion conductivity, simple preparation methods, and excellent electrochemical performance. Effect

Active Publication Date: 2019-04-19
HEFEI UNIV OF TECH
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Problems solved by technology

When pure antimony telluride is directly used as a battery material, the volume expansion will occur due to the intercalation and extraction of metal (lithium, sodium) ions during the charging and discharging process, and the morphology will be destroyed, so that the battery cannot have a long-lasting cycle performance.

Method used

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  • Preparation method of porous carbon-coated antimony telluride nanosheet and application thereof as negative electrode material of metal ion battery
  • Preparation method of porous carbon-coated antimony telluride nanosheet and application thereof as negative electrode material of metal ion battery
  • Preparation method of porous carbon-coated antimony telluride nanosheet and application thereof as negative electrode material of metal ion battery

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Embodiment 1

[0037] Step 1: Weigh 22.4mg antimony trichloride (SbCl 3 ), 0.4g of tartaric acid (TA) were dissolved in 6mL of distilled water, and then 31.5mg of sodium tellurite (Na 2 TeO 3 ), 20mL of ammonia water and 8mL of hydrazine hydrate, stirred for 6min, put into the reaction kettle, and reacted at 180°C for 5h, the obtained product was washed with distilled water and absolute ethanol several times, and dried under vacuum to obtain Sb 2 Te 3 Nanosheets;

[0038] Step 2: Add 60mg Sb 2 Te 3 Add the nanosheets into a mixture of 35mL ethanol and 24mL water, and disperse evenly by ultrasonication, then add 108mg cetyltrimethylammonium bromide (CTAB), stir for 10min, continue to add 60mg resorcinol, 120μL ammonia water and 50μL formaldehyde solution, stirred and reacted at room temperature for 16 hours; after the reaction, the resulting product was washed with distilled water and absolute ethanol several times, and dried under vacuum conditions to obtain Sb 2 Te 3 @RF Nanosheet; ...

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Abstract

The invention discloses a preparation method of a porous carbon-coated antimony telluride nanosheet, and an application of the porous carbon-coated antimony telluride nanosheet as a negative electrodematerial of a metal ion battery. The preparation method is characterized by comprising the steps of: firstly, acquiring an antimony telluride nanosheet by adopting a hydrothermal method; secondly, coating the antimony telluride nanosheet with resorcinol-formaldehyde resin by adopting a liquid phase reaction technology; and finally, converting the resorcinol-formaldehyde resin into porous carbon through high-temperature carbonization, and acquiring the porous carbon-coated antimony telluride nanosheet. The preparation method of the product is simple, the used raw materials are cheap and easy to obtain, the porous carbon-coated antimony telluride nanosheet shows good cyclic stability and high cycle specific capacity when applied to the metal (lithium, sodium) ion battery, and the electrochemical performance is excellent.

Description

technical field [0001] The invention relates to a preparation method of a porous carbon-coated antimony telluride nanosheet and its application as a metal (lithium, sodium) ion battery negative electrode material, belonging to the field of nanometer materials. Background technique [0002] With the rapid development of industry in today's world, the consumption of fossil fuels has increased sharply, leading to resource depletion, and environmental pollution has become increasingly serious. Therefore, it is extremely important to seek renewable energy and clean energy, and to develop secondary energy with high energy density and high cycle stability. Battery energy storage technology is an important means to deal with current energy and environmental issues. Lithium-ion batteries (LIBs) have the advantages of high energy density, high cycle life, small size, no memory effect, and no pollution, and are widely used in large-scale energy storage equipment, new energy vehicles, a...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M10/054
CPCH01M4/364H01M4/38H01M4/58H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 张朝峰张无迪张大伟邱立峰饶娟丘德立陈东
Owner HEFEI UNIV OF TECH
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