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Two-dimensional carbon plate electrode material with uniform sub-nanopore distribution as well as preparation method and application of two-dimensional carbon plate electrode material

A kind of electrode material and sub-nanometer technology, which is applied in the direction of hybrid capacitor electrode, hybrid/electric double layer capacitor manufacturing, etc., can solve the uneven distribution of sub-nano micropores in two-dimensional carbon materials, affect the application of two-dimensional carbon sheets, and complex methods, etc. problems, achieve high specific capacity, controllable structure and morphology, and simple preparation

Pending Publication Date: 2020-10-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods have their own limitations: the method is complicated, the cost is high, and the prepared carbon sheet is impure and needs to be purified, etc.
In addition, the common disadvantage of the above two methods is that the prepared two-dimensional carbon material has an uneven distribution of sub-nanometer micropores, which affects the further application of two-dimensional carbon sheets in supercapacitors.

Method used

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  • Two-dimensional carbon plate electrode material with uniform sub-nanopore distribution as well as preparation method and application of two-dimensional carbon plate electrode material
  • Two-dimensional carbon plate electrode material with uniform sub-nanopore distribution as well as preparation method and application of two-dimensional carbon plate electrode material
  • Two-dimensional carbon plate electrode material with uniform sub-nanopore distribution as well as preparation method and application of two-dimensional carbon plate electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a two-dimensional carbon sheet electrode material with uniform subnanopore distribution, comprising the following steps:

[0030] Step 1: Weigh phthalimide potassium salt and put it in a clean boat for subsequent use;

[0031] Step 2: Place the metal substrate treated in step 1 in the constant temperature zone of the tube furnace, seal the nozzle of the quartz tube at the same time, and heat at 750° C. for 3 hours at a heating rate of 2° C. / min in a nitrogen atmosphere. Then, the obtained material was washed with 1 M dilute hydrochloric acid and deionized water until its pH reached neutrality. Finally, the precipitate was dried at 60 °C for 12 h to prepare a two-dimensional carbon sheet with uniform subnanometer pore distribution.

[0032] The above-prepared two-dimensional carbon sheet with uniform subnanopore distribution was used as an electrode material to test its performance in a three-electrode system, wherein: the prepared two-dimensional...

Embodiment 2

[0035] The process of this embodiment is the same as that of Example 1, except that some process parameters are changed: the pyrolysis temperature is 650°C.

[0036] The above-prepared two-dimensional carbon sheet with uniform subnanopore distribution was used as an electrode material to test its performance in a three-electrode system, wherein: the prepared two-dimensional carbon sheet with uniform subnanopore distribution was used as the working electrode, and the platinum sheet was used as the counter electrode. electrode, Hg / HgO electrode as a reference electrode. The above-assembled device was used for performance tests such as cyclic voltammetry, impedance, galvanostatic charge and discharge, and cycle stability with a Koster electrochemical workstation. The test results are as follows:

[0037] The cyclic voltammetry characteristic curve of the arrayed carbon nanotubes prepared in this embodiment is as follows Figure 5 It can be seen from the figure that changing the...

Embodiment 3

[0039] The process of this embodiment is the same as that of Example 1, except that some process parameters have changed: the pyrolysis temperature is 850°C

[0040] The above-prepared two-dimensional carbon sheet with uniform subnanopore distribution was used as an electrode material to test its performance in a three-electrode system, wherein: the prepared two-dimensional carbon sheet with uniform subnanopore distribution was used as the working electrode, and the platinum sheet was used as the counter electrode. electrode, Hg / HgO electrode as a reference electrode. The above-assembled device was used for performance tests such as cyclic voltammetry, impedance, galvanostatic charge and discharge, and cycle stability with a Koster electrochemical workstation. The test results are as follows:

[0041] The cyclic voltammetry characteristic curve of the arrayed carbon nanotubes prepared in this embodiment is as follows Figure 5 It can be seen from the figure that increasing t...

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Abstract

The invention discloses a preparation method of a two-dimensional carbon plate electrode material with uniform sub-nanopore distribution, and belongs to the technical field of preparation of two-dimensional carbon plate electrode materials, and the preparation method comprises the following steps: 1) carrying out hydrothermal reaction on sylvite at 650-850 DEG C for 2-4 hours; and 2) after coolingto room temperature, washing the pyrolysis product in the step 1) until the pH value is neutral, and drying to obtain the two-dimensional carbon plate electrode material with uniform sub-nanopore distribution. According to the method, the two-dimensional carbon plate with uniform sub-nanopore distribution is directly prepared by using a one-step carbonization activation method, and no other additive is added in the preparation process, so that the reaction steps are reduced, and the preparation cost is saved. And the method can be expanded to other sylvite-containing substances, and has verygood universality.

Description

technical field [0001] The invention belongs to the technical field of preparation of two-dimensional carbon sheet electrode materials, and relates to a two-dimensional carbon sheet electrode material with uniform subnanometer hole distribution, a preparation method and application thereof. Background technique [0002] As a new type of energy storage device, supercapacitor has excellent characteristics such as high power density, fast charging rate, long cycle life, wide operating temperature range, excellent low temperature performance and environmental protection, and has broad application prospects in many fields. Electrode materials are one of the key factors determining the electrochemical performance of supercapacitors, so the development of electrode materials with excellent characteristics is the core of supercapacitor research. In recent years, two-dimensional carbon sheets due to the nanophase sp 2 - The unique electronic properties and physical and chemical effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/34H01G11/36H01G11/86
CPCH01G11/24H01G11/26H01G11/34H01G11/36H01G11/86Y02E60/13
Inventor 周江奇龙志唐伟
Owner XI AN JIAOTONG UNIV
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