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Preparation method of nitrogen-doped carbon-coated zinc telluride nanometer wire and application thereof serving as sodium-ion battery negative electrode material

A technology of nitrogen-doped carbon and nanowires, applied in battery electrodes, negative electrodes, nanotechnology, etc., can solve the problems of batteries not having cycle performance, material morphology damage, etc., to improve conductivity, stability, and cycle performance Good, high specific capacity effect

Active Publication Date: 2018-08-03
HEFEI UNIV OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When pure zinc telluride is directly used as a battery material, the shape of the material is destroyed due to volume expansion due to the intercalation and extraction of sodium ions during the charging and discharging process, so that the battery cannot have a long-lasting cycle performance.

Method used

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  • Preparation method of nitrogen-doped carbon-coated zinc telluride nanometer wire and application thereof serving as sodium-ion battery negative electrode material
  • Preparation method of nitrogen-doped carbon-coated zinc telluride nanometer wire and application thereof serving as sodium-ion battery negative electrode material
  • Preparation method of nitrogen-doped carbon-coated zinc telluride nanometer wire and application thereof serving as sodium-ion battery negative electrode material

Examples

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Embodiment 1

[0039] In this example, a nitrogen-doped carbon-coated zinc telluride nanowire composite material was prepared according to the following steps:

[0040] 1. Add 0.0922g Na 2 TeO 3Dissolve 1g of PVP in 18mL of ethylene glycol, then add 15mL of acetone, 3.35mL of ammonia water and 1.65mL of hydrazine hydrate in turn, stir at room temperature until completely dissolved, then put the mixed solution into a polytetrafluoroethylene liner, and then put Stainless steel high-temperature and high-pressure reaction kettle, heated at 180°C for 4 hours; after the reaction was completed, cooled to room temperature, centrifuged and washed with acetone to obtain Te nanowires;

[0041] 2. Add the Te nanowires obtained in step 1 into 30mL of ethylene glycol, stir ultrasonically until uniformly dispersed, then add 10mL of ethylene glycol solution in which 0.2g of silver nitrate is dissolved, stir at room temperature for 1h, centrifuge after the reaction is over and use a deionized Washed with w...

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Abstract

The invention discloses a preparation method of a nitrogen-doped carbon-coated zinc telluride nanometer wire and application thereof serving as a sodium-ion battery negative electrode material. Firstly, a tellurium nanometer wire is synthesized by using a hydrothermal method, the tellurium nanometer wire is stirred with a silver nitrate solution at room temperature to be converted as the silver telluride nanometer wire, then silver telluride nanometer wire reacts with a zinc nitrate solution to be converted as the zinc telluride nanometer wire by using an ion exchange reaction, the zinc telluride nanometer wire is coated with dopamine hydrochloride, and the nitrogen-doped carbon-coated zinc telluride nanometer wire is obtained through high temperature calcinations under the argon or nitrogen atmosphere. The preparation method of the composite material is simple, the raw materials are cheap and easy to obtain, the obtained material has the good cycling stability and specific capacity when serving as the sodium-ion battery negative electrode, and can be taken as the excellent sodium-ion battery negative electrode material.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped carbon-coated zinc telluride nanowire and its application as a negative electrode material of a sodium ion battery, belonging to the field of nanomaterial synthesis. Background technique [0002] The US Geological Service estimates that the world's ultimate recoverable oil reserves are 3 trillion barrels. The world's total recoverable coal reserves are about 847.5 billion tons. According to the current consumption level, it can only last for about 200 years at most. The world's natural gas reserves are about 177 trillion cubic meters. If the annual production volume remains at 2.3 trillion cubic meters, natural gas will be exhausted within 80 years. Therefore, it is very urgent to find alternative renewable energy sources. As a tool that can store energy, batteries have made great contributions to the development of science and technology in the world today. However, most of the lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/581H01M4/625H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 张朝峰邱立峰李春晓饶娟陈东丘德立
Owner HEFEI UNIV OF TECH
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