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Preparation method and application of black phosphorus quantum dot and titanium carbide nanosheet composite material

A composite material and black phosphorus quantum technology, which is applied in the development and research of new energy materials, can solve the problems of high price of graphene and complicated preparation process, and achieve the effect of simple preparation process, improved battery performance, and poor conductivity.

Active Publication Date: 2018-06-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the graphene and Ti used in this patent 3 C 2 Both are two-dimensional layered materials with good conductivity, and the price of graphene is relatively high; on the other hand, the patent requires two high-temperature dryings and multiple washings in the preparation process, and the preparation process is more complicated; moreover, the patent is only Composite preparation involving two materials and no research on its application

Method used

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  • Preparation method and application of black phosphorus quantum dot and titanium carbide nanosheet composite material
  • Preparation method and application of black phosphorus quantum dot and titanium carbide nanosheet composite material
  • Preparation method and application of black phosphorus quantum dot and titanium carbide nanosheet composite material

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Effect test

Embodiment 1

[0026] A BPQDs / Ti 3 C 2 The nanosheet composite material and its preparation method and application, adopt the following steps:

[0027] (1) First use 0.5g LiF and 6mol / L HCl to dissolve Ti 3 AlC 2 (MAX) etch to get Ti 3 C 2 Accordion sample followed by Ti 3 C 2 Ultrasonic (200W, 10min) in water to obtain single or few layers of Ti 3 C 2 The nanosheets were freeze-dried, and the scanning electron micrographs and transmission electron micrographs are as follows: figure 1 shown;

[0028] (2) The black phosphorus block was peeled off by 600W ultrasonic wave for 4 hours in DMF solvent excluding air to obtain black phosphorus quantum dots;

[0029] (3) the solid Ti prepared by step (1) 3 C 2 20mg of nanosheets and 0.01mg / ml black phosphorus quantum dots prepared in step (2) were sonicated in 10mL DMF solvent for 10min, stirred for 24h, and dried to prepare BPQDs / Ti 3 C 2 nanosheet composites.

[0030] (4) With BPQDs / Ti coated on copper foil 3 C 2 The nanosheet comp...

Embodiment 2

[0032] A BPQDs / Ti 3 C 2 The nanosheet composite material and its preparation method and application, adopt the following steps:

[0033] (1) First use 0.5g LiF and 6mol / L HCl to dissolve Ti 3 AlC 2 (MAX) etch to get Ti 3 C 2 Accordion sample followed by Ti 3 C 2 Ultrasonic (60W, 60min) in water to obtain single or few layers of Ti 3 C 2 nanosheets and lyophilize them;

[0034] (2) The black phosphorus block was stripped by 200W ultrasonic for 8h in DMF solvent excluding air to obtain black phosphorus quantum dots, such as figure 2 As shown, the transmission electron microscope shows that the particle size of the quantum dot is less than 10nm;

[0035] (3) the solid Ti prepared by step (1) 3 C 2 1000mg of nanosheets and 0.5mg / ml black phosphorus quantum dots prepared in step (2) were sonicated in 1000mL DMF solvent for 30min, stirred for 24h, and dried to prepare BPQDs / Ti 3 C 2 nanosheet composites.

[0036] (4) With BPQDs / Ti coated on copper foil 3 C 2 The na...

Embodiment 3

[0038] A BPQDs / Ti 3 C 2 The nanosheet composite material and its preparation method and application, adopt the following steps:

[0039] (1) First use 50% HF acid to treat Ti 3 AlC 2 (MAX) etch to get Ti 3 C 2 Accordion sample followed by Ti 3 C 2 Ultrasonic (100W, 20min) in water to obtain single or few layers of Ti 3 C 2 nanosheets and lyophilize them;

[0040] (2) The black phosphorus block was stripped by 300W ultrasonic for 24 hours in an NMP solvent excluding air to obtain black phosphorus quantum dots;

[0041] (3) the solid Ti prepared by step (1) 3 C 2 100mg of nanosheets and 0.1mg / ml black phosphorus quantum dots prepared in step (2) were sonicated in 60mL NMP solvent for 20min, stirred for 24h, and dried to prepare BPQDs / Ti 3 C 2 The nanosheet composite material was characterized by transmission electron microscopy, such as image 3 shown.

[0042] (4) With BPQDs / Ti coated on copper foil 3 C 2 The nanosheet composite material is used as the working ...

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Abstract

The invention relates to a preparation method and application of a black phosphorus quantum dot and titanium carbide nanosheet composite material. The preparation method comprises the following steps:mixing a single layer or a few layers of Ti3C2 nanosheets with black phosphorus quantum dots dispersed uniformly inside an organic solution, and carrying out simple technologies such as ultrasonic treatment, stirring and drying to obtain the black phosphorus quantum dot and titanium carbide (BPQDs / Ti3C2) nanosheet composite material. The BPQDs / Ti3C2 nanosheet composite material coated on a coppersheet is taken as a working electrode of an energy battery, metal foils are taken as a counter electrode and a reference electrode, a glass microfiber filter membrane is taken as a diaphragm, an organic solution is taken as an electrolyte, and a button battery is assembled inside a glove box filled with high-purity argon. The product can serve as a two-dimensional electrode material, is widely applied to the energy field such as lithium ion batteries, and has excellent charge / discharge performance and cycling stability.

Description

technical field [0001] The invention belongs to the technical field of development and research of new energy materials, and in particular relates to a preparation method and application of a black phosphorus quantum dot / titanium carbide nanosheet composite material. Background technique [0002] Due to its high open circuit voltage, high energy density, no memory effect, long cycle life, and environmental friendliness, lithium-ion batteries are widely used in portable electronic products such as mobile phones, notebook computers, and digital cameras, and are widely used in electric vehicles (EV) and Fields such as hybrid electric vehicles (HEV) have good prospects for development. At present, the commercially used negative electrode material is mainly graphite, and its theoretical specific capacity is 372mAh / g, which cannot meet the increasing energy demand. Electrode material is an important part that affects battery performance. Black phosphorus (BP) is a two-dimensiona...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62
CPCH01M4/366H01M4/624Y02E60/10
Inventor 杨金虎孟瑞晋黄继梅刘光磊祖连海徐梦竹
Owner TONGJI UNIV
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