Preparation method of ultrathin graphene-like carbon material for supercapacitor

A supercapacitor and graphene carbon technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, circuits, etc., can solve the problems of difficult access to precursors, complicated and cumbersome preparation processes, and low doping amount of heteroatom nitrogen. , to achieve the effect of excellent conductivity, wide source of raw materials, and simple operation steps

Active Publication Date: 2020-09-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many deficiencies in the work of these researchers, such as complex and cumbersome preparation process, difficult access to precursors, need to use template treatment, low heteroatom nitrogen doping, etc., which are applied to the specific capacitance and Cycle performance still needs to be further improved

Method used

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  • Preparation method of ultrathin graphene-like carbon material for supercapacitor
  • Preparation method of ultrathin graphene-like carbon material for supercapacitor
  • Preparation method of ultrathin graphene-like carbon material for supercapacitor

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Embodiment 1

[0041] A kind of preparation method of ultra-thin graphene-like carbon material for supercapacitor, comprises the following steps:

[0042] S1: Weigh 1.0671 g of aniline solution (1 mL), 4 g of melamine, wherein the mass ratio of aniline to melamine is 1:4, measure 1.14 mL of glacial acetic acid, add the above materials into a 100 mL beaker, add 30 mL Deionized water, sonication for 30 minutes, and then continuous stirring for 4 hours to obtain a uniform mixed solution (the chemical reagents described in step S1 are all analytically pure);

[0043] S2: Weigh 1.3 g of ammonium persulfate, add 30 mL of deionized water to obtain an ammonium persulfate solution, add the ammonium persulfate solution dropwise to the mixed solution prepared in step S1, react at room temperature for 12 hours, and continue stirring during this period to obtain Compounds of melamine and polyaniline;

[0044] S3: Transfer 60 mL of the compound into a 100 mL high-pressure hydrothermal kettle, add 2 mL of...

Embodiment 2

[0050] A kind of preparation method of ultra-thin graphene-like carbon material for supercapacitor, comprises the following steps:

[0051] S1: Weigh 1.0671 g of aniline solution (1 mL), 4 g of dicyandiamide, wherein the mass ratio of aniline to dicyandiamide is 1:4, measure 1.14 mL of glacial acetic acid, and add the above materials into a 100 mL beaker , add 30 mL of deionized water, sonicate for 30 min, and then continue to stir for 4 h to obtain a uniform mixed solution (the chemical reagents described in step S1 are all analytically pure);

[0052] The remaining steps and processes are the same as in Example 1. The solid powder is tested by SEM, and the thickness of the graphene-like carbon material flake is 1.58nm.

Embodiment 3

[0054] S1: Weigh 1.0671 g of aniline solution (1 mL), 4 g of melamine, wherein the mass ratio of aniline to melamine is 1:4, measure 1.14 mL of concentrated sulfuric acid, add the above materials into a 100 mL beaker, add 30 mL Deionized water, sonication for 30 minutes, and then continuous stirring for 4 hours to obtain a uniform mixed solution (the chemical reagents described in step S1 are all analytically pure);

[0055] The remaining steps and processes are the same as in Example 1. The solid powder is tested by SEM, and the thickness of the graphene-like carbon material flake is 5.6nm.

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Abstract

The invention belongs to the technical field of supercapacitors, and particularly discloses a preparation method of a graphene-like ultrathin carbon material for a supercapacitor, which takes a compound of polyaniline and melamine as a precursor and adopts a hydrothermal method and a simple calcining process to prepare an ultrathin graphene-like sheet carbon material. Polyaniline serves as a nitrogen source, a carbon source and a self-template, melamine serves as the nitrogen source, impurities of the composite nitrogen source are removed through a hydrothermal method, the high-nitrogen-content doped ultrathin sheet morphology can be stably formed, and the prepared nitrogen-doped carbon material is of a 2D sheet structure and has good supercapacitor electrochemical performance. In addition, the method is simple in operation step, low in production cost, safe in production process, wide in raw material source and suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, in particular to a method for preparing a graphene-like ultrathin carbon material for supercapacitors. Background technique [0002] In recent years, supercapacitors have attracted extensive attention from researchers due to their advantages such as high power density, fast charge and discharge capacity, and long cycle life. The energy storage device with development prospects, and the electrode material plays a decisive role in the performance of the supercapacitor, so the research on the electrode material has become the focus and difficulty of the supercapacitor research. [0003] At present, electrode materials for supercapacitors are mainly divided into three categories: carbon materials, metal oxides and conductive polymers. Carbon materials are widely sought after by people because of their unique advantages such as abundant raw material sources, simple preparation process, non-to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/44H01G11/32H01G11/26H01M4/583H01M10/052
CPCH01G11/86H01G11/44H01G11/32H01G11/26H01M4/583H01M10/052Y02E60/10Y02E60/13
Inventor 高云芳吴宝亮徐新
Owner ZHEJIANG UNIV OF TECH
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