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2D layered structure V2C electrode material and preparation method and application

An electrode material, two-dimensional layered technology, applied in the field of electrochemical materials, to achieve high specific capacitance, good electrochemical stability, and high stability

Inactive Publication Date: 2015-11-18
SHANGHAI UNIV OF ENG SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, current research on the preparation of two-dimensional layered structures V 2 Technical information of C electrode materials existing reports

Method used

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  • 2D layered structure V2C electrode material and preparation method and application
  • 2D layered structure V2C electrode material and preparation method and application
  • 2D layered structure V2C electrode material and preparation method and application

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Embodiment 1

[0031] The present embodiment two-dimensional layered structure V 2 The C electrode material is prepared by the following steps:

[0032] (1) In an inert gas atmosphere, add vanadium powder, aluminum powder and graphite powder into the ball milling tank at a material ratio of 2:1.3:1. The ball-to-material ratio in the ball milling tank is 1:1. 6h, prepare the precursor mixture;

[0033] (2) Transfer the precursor mixture to a tube furnace, pass in an inert gas, raise the temperature of the tube furnace to 1500 °C at 5 °C / min, and treat at a constant temperature for 4 hours to obtain a two-dimensional carbide crystal V 2 AlC;

[0034] (3) The two-dimensional carbide crystal V 2 AlC is placed in a HF solution with a mass fraction of 20%, etched for 90 hours, filtered, washed, and dried to obtain the two-dimensional layered structure V 2 C electrode material.

[0035] Wherein, the purity of vanadium powder, aluminum powder and graphite powder are analytical pure, and graphit...

Embodiment 2

[0044] The present embodiment two-dimensional layered structure V 2 The C electrode material is prepared by the following steps:

[0045] (1) In an inert gas atmosphere, add vanadium powder, aluminum powder and graphite powder into the ball milling tank at a mass ratio of 2:1.5:1, and the ball-to-material ratio in the ball milling tank is 1.5:1 , ball milling and mixing for 3 hours to prepare the precursor mixture;

[0046] (2) Transfer the precursor mixture to a tube furnace, pass in an inert gas, raise the temperature of the tube furnace to 1600 °C at 4 °C / min, and treat at a constant temperature for 2 hours to obtain a two-dimensional carbide crystal V 2 AlC;

[0047] (3) The two-dimensional carbide crystal V 2 AlC is placed in a HF solution with a mass fraction of 10%, etched for 120 hours, filtered, washed, and dried to obtain the two-dimensional layered structure V 2 C electrode material.

[0048] Wherein, the purity of vanadium powder, aluminum powder and graphite ...

Embodiment 3

[0052] The present embodiment two-dimensional layered structure V 2 The C electrode material is prepared by the following steps:

[0053] (1) In an inert gas atmosphere, add vanadium powder, aluminum powder and graphite powder into the ball milling tank at a material ratio of 2:1:1. The ball-to-material ratio in the ball milling tank is 2:1. 4h, prepare the precursor mixture;

[0054] (2) Transfer the precursor mixture to a tube furnace, pass in an inert gas, raise the temperature of the tube furnace to 1300 °C at 6 °C / min, and treat at a constant temperature for 5 hours to obtain a two-dimensional carbide crystal V 2 AlC;

[0055] (3) The two-dimensional carbide crystal V 2 AlC is placed in a HF solution with a mass fraction of 30%, etched for 60 hours, filtered, washed, and dried to obtain the two-dimensional layered structure V 2 C electrode material.

[0056] Wherein, the purity of vanadium powder, aluminum powder and graphite powder are analytical pure, and graphite ...

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Abstract

The invention discloses a 2D layered structure V2C electrode material and a preparation method thereof and an application. The preparation method comprises steps of preparing a 2D carbide crystal V2AIC through a high temperature solid phase method, adopting an HF solution to corrode the V2AIC, corroding the AI atomic layer in the 2D carbide crystal V2AI, and obtaining the 2D layered structure V2C electrode material which is used for manufacturing a super capacitor. Compared with the prior art, the invention is simple in the preparation process and is applicable to the mass production. The manufactured V2C electrode material is a 2D layered structure and can store energy through inserting a pseudo-capacitor, which can effectively improve the electric chemical performance of the super capacitor, stable in the electric chemistry and can be applied in the power supply occasion where the stability is high and the power density is high.

Description

technical field [0001] The invention belongs to the technical field of electrochemical materials, and relates to a two-dimensional layered structure V 2 C electrode materials and their preparation methods and applications. Background technique [0002] As a new type of energy storage element, supercapacitor has unique advantages such as high power and long life, and has broad application prospects in consumer electronics, UPS (uninterruptible power system) and hybrid power system for electric vehicles. Supercapacitors are divided into carbon-based supercapacitors (electric double layer capacitors) and quasi-capacitive capacitors with metal oxides and conductive polymers as electrode materials according to the different energy storage mechanisms. The energy density of carbon-based supercapacitors is low, ranging from 3 to 7 Wh / kg. Improving the energy density of supercapacitors is a scientific problem that needs to be solved urgently. In order to improve its energy density,...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/22H01G11/86
CPCY02E60/13
Inventor 赵家昌夏楠徐菁利吴远东庞雷石静山王昕李长青
Owner SHANGHAI UNIV OF ENG SCI