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Electrochemical synthesis method of two-dimensional titanium carbide nanosheet

A technology of two-dimensional titanium carbide and synthesis method, applied in the direction of titanium carbide, carbide, nanotechnology, etc., can solve problems such as operator and environmental damage, high toxicity, etc., and achieve improved rate performance, high conductivity, and thin thickness. Effect

Inactive Publication Date: 2017-11-24
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Ti 3 SiC 2 、Ti 3 AlC 2 or Ti 2 AlC is a ceramic material with a layered structure. The Si or Al atoms in the material can be etched away by chemical methods to form an accordion-shaped titanium carbide material, which can be stripped into two-dimensional titanium carbide after further treatment. Nanomaterials, but this method generally requires highly toxic and high-concentration hydrofluoric acid chemical reagents, which is easy to cause harm to operators and the environment. At the same time, multi-step operations are required to prepare titanium carbide two-dimensional nanomaterials

Method used

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  • Electrochemical synthesis method of two-dimensional titanium carbide nanosheet

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Embodiment 1

[0017] to Ti 3 SiC 2 The material is the positive electrode, where Ti 3 SiC 2 Electrodes were prepared with Ti 3 SiC 2 The powder material is used as the raw material, which is formed by dry pressing at 50MPa, and then sintered under the protection of argon for 1000 o C, made in 2 hours, to contain NaF and Na 2 SO 4 The mixed aqueous solution is the electrolyte, and its concentration is 0.5 mol L -1 with 2 mol L -1 , with graphite as the negative electrode, the control voltage is 1.2V, and the Ti 3 SiC 2 The electrochemical etching and stripping of the positive electrode can strip the ultra-thin two-dimensional material. After the stripping is completed, the Ti-containing 3 C 2 The electrolyte of the nanosheets is vacuum filtered, washed with deionized water, and freeze-dried to obtain Ti 3 C 2 Nanosheet powder material.

Embodiment 2

[0019] to Ti 3 AlC 2 The material is the positive electrode, where Ti 3 AlC 2 Electrodes were prepared with Ti 3 AlC 2 The powder material is used as the raw material, which is formed by dry pressing at 50MPa, and then sintered under the protection of argon for 900 o C, made in 2 hours, to contain NaF and Na 2 SO 4 The aqueous solution is the electrolyte, and its concentration is 0.2 mol L -1 with 3 mol L -1 , with graphite as the negative electrode, the control voltage was 0.9 V, and the Ti 3 AlC 2 Electrochemical etching and stripping of positive electrode can strip ultrathin two-dimensional Ti 3 C 2 Nanosheet material, after the exfoliation is completed, the Ti-containing 3 C 2 The electrolyte of nanosheets is vacuum filtered, washed with deionized water, and freeze-dried to obtain Ti 3 C 2 Nanosheet powder material.

Embodiment 3

[0021] to Ti 2 AlC material is the positive electrode, where Ti 2 Preparation of AlC electrode with Ti 2 AlC powder material is used as the raw material, which is formed by dry pressing at 40MPa, and then sintered under the protection of argon for 800 o C, made in 2 hours, to contain NaF and Na 2 SO 4 The aqueous solution is the electrolyte, and its concentration is 0.1 mol L -1 with 1 mol L -1 , with graphite as the negative electrode, the control voltage was 0.9 V, and the Ti 2 Electrochemical etching and lift-off of AlC cathode for ultrathin 2D Ti 2 C nanosheet material, after the exfoliation is completed, the Ti-containing 2 The electrolyte of C nanosheets is vacuum filtered, washed with deionized water, and freeze-dried to obtain Ti 2 C nanosheet powder material.

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Abstract

The invention discloses an electrochemical synthesis method of a two-dimensional titanium carbide nanosheet. The ultrathin two-dimensional titanium carbide nanosheet can be directly prepared from an anode material through an electrochemical reaction on an anode at certain voltage with Ti3SiC2, Ti3AlC2, TiAlC or other materials as an anode and a water solution containing F<-> and SO4<2-> as electrolyte. The two-dimensional nanosheet can be independently used and can be combined with other materials for use, can serve as an electrode material to be used in a lithium ion battery and a supercapacitor and can also be used for the field of electronics and the like.

Description

technical field [0001] The invention relates to the field of preparation of two-dimensional nanomaterials, in particular to a preparation method of ultrathin two-dimensional titanium carbide nanomaterials. Background technique [0002] Graphene and graphene-like two-dimensional nanomaterials are emerging nanomaterials in recent years. Due to their unique structure and properties, they can be widely used in energy storage, catalysis, electronics and other fields. Titanium carbide two-dimensional nanomaterial is a new type of graphene-like nanomaterial, which has the advantages of thin thickness and high electrical conductivity, and can be used in lithium-ion batteries, lithium-sulfur batteries, supercapacitors, fuel cells and other fields. [0003] Ti 3 SiC 2 、Ti 3 AlC 2 or Ti 2 AlC is a ceramic material with a layered structure. The Si or Al atoms in the material can be etched away by chemical methods to form an accordion-shaped titanium carbide material, which can be s...

Claims

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Application Information

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IPC IPC(8): C01B32/921B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/62
Inventor 武卫明张长松周丽敏侯绍刚王书红张楠
Owner ANYANG INST OF TECH
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