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Preparation method and application of waste plastic derived TiC nano material

A technology of waste plastics and nanomaterials, which is applied in the field of preparation of TiC nanomaterials derived from waste plastics, can solve the problems of reduced cycle times and excessive attenuation of lithium-sulfur battery capacity, so as to reduce waste of resources, improve electrochemical stability, and be cheap Effect

Active Publication Date: 2021-02-05
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon leads to excessive capacity fading or a sharp drop in the number of cycles of lithium-sulfur batteries during long cycles.

Method used

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  • Preparation method and application of waste plastic derived TiC nano material
  • Preparation method and application of waste plastic derived TiC nano material
  • Preparation method and application of waste plastic derived TiC nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] S1. Crush waste plastics to 100 mesh;

[0035] S2. Soak the pulverized PTFE in 50 mL 2 mol / L hydrochloric acid for 2 hours, then filter, then soak in 50 mL 2 mol / L sodium hydroxide solution for 12 hours, wash and dry for later use;

[0036] S3. Add 0.5g PTFE, 0.4g Ti powder and 2.5g metal sodium into a 20 mL stainless steel autoclave, seal it and put it into an electric furnace. The electric furnace rises from room temperature to 650°C within 90min and maintains it at 650°C After 5 hours, cool to room temperature; the product in the autoclave reaction includes gray-black deposits and residual gases. After collecting the gray-black deposits stuck on the inner surface of the kettle wall, wash them with absolute ethanol, distilled water, and dilute hydrochloric acid. Washed with distilled water several times, centrifuged at 4000 r / min, dried in a vacuum oven at 60°C for 8 hours, and finally collected for characterization.

[0037] Adopt X-ray powder diffraction (XRD) inst...

Embodiment 2

[0039] S1. Crushing waste plastics to 150 mesh;

[0040] S2. Soak the pulverized PTFE in 50 mL 2 mol / L hydrochloric acid for 2 hours, then filter, then soak in 50 mL 2 mol / L potassium hydroxide solution for 12 hours, wash and dry for later use;

[0041] S3. Add 0.5 g PTFE, 0.5 g Ti powder and 3.0 g metallic sodium into a 20 mL stainless steel autoclave, seal it and put it into an electric furnace. The electric furnace rises from room temperature to 400°C within 90 minutes and maintains it at 400°C After 30 hours, cool to room temperature; the products in the autoclave reaction include gray-black deposits and residual gases. After collecting the gray-black deposits stuck to the inner surface of the kettle wall, wash them with absolute ethanol, distilled water, dilute hydrochloric acid Wash with distilled water several times, centrifuge the obtained samples, dry the samples in a vacuum oven at 60°C for 8 hours, and finally collect them for characterization.

[0042] Adopt X-ray p...

Embodiment 3

[0044] S1. Crushing waste plastics to 200 mesh;

[0045] S2. Soak the pulverized PTFE in 50 mL of 1 mol / L sulfuric acid for 2 hours, then filter, then soak in 50 mL of 2 mol / L potassium hydroxide solution for 12 hours, wash and dry for later use;

[0046] S3. Add 0.5g of PTFE, 0.4g of Ti powder and 2.0g of metallic sodium into a 20 mL stainless steel autoclave, seal it and put it into an electric furnace. The electric furnace rises from room temperature to 500°C within 90 minutes and maintains it at 500°C Cool to room temperature after 10 h; the product of the autoclave reaction consists of gray-black deposits and residual gas. Collect the gray-black deposits sticking to the inner surface of the kettle wall, wash them with absolute ethanol, distilled water, dilute hydrochloric acid and distilled water for several times, centrifuge the obtained samples, and dry the samples in a vacuum drying oven at 60°C for 8 hours , and finally collected for characterization.

[0047] Fig...

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Abstract

The invention belongs to the field of comprehensive utilization of waste plastics, and discloses a preparation method of a waste plastic derived TiC nano material, which comprises the following steps:S1, pulverizing waste plastics to 100-200 meshes; and S2, soaking the crushed waste plastic in an acid solution with a concentration of 1-2 mol / L for 1-3 h, then soaking the waste plastic in an alkali solution with a concentration of 1-2 mol / L for 10-14 h, and carrying out washing and drying for later use. According to the novel method for preparing the TiC nano material through the one-step chemical reaction under the relatively low temperature condition, production equipment needed by the production process of the method is simple, operation is easy, raw materials are rich in source and lowin price, industrial production is easy to achieve, preparation of the TiC nano material is achieved through simple product treatment in the later period, and the TiC nano material is used as a diaphragm modification layer to improve the electrochemical performance of the lithium-sulfur battery.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of waste plastics, in particular to a preparation method and application of TiC nanometer materials derived from waste plastics. Background technique [0002] Transition metal carbides have recently received considerable attention for their important applications in the mechanical industry and aerospace. Among transition metal carbides, titanium carbide (TiC) is an important non-oxide ceramic material with good chemical stability, extremely high hardness, high melting point, high Young's modulus, low density, and good Electrical and thermal conductivity. [0003] In the past few decades, a variety of methods for the synthesis of TiC have been reported, including: self-propagating high-temperature synthesis (SHS) (Int. J. Refract. Met. Hard Mater. 2009, 27, 584), mechanochemical synthesis ( J. Mater. Sci.2018, 53, 13584), sonochemistry (Cermic. Int. 2015, 41, 11301), melting casting (J. M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L71/02C08L1/28C08L9/06C08K3/14
CPCC08L27/18C08L2207/20C08L2203/20C08L2205/035C08L71/02C08L1/286C08L9/06C08K3/14
Inventor 张开龙刘苏瑶罗俊瑞国峰韩尚周玉轩胡光张孝杰胡伟伟胡涛
Owner HUAIYIN INSTITUTE OF TECHNOLOGY