Cotton-derived porous carbon electrode material and synthesis method and application thereof

A technology of porous carbon electrodes and porous carbon materials, which is applied in the field of cotton-derived porous carbon electrode materials and their synthesis, can solve problems such as the rare research on composite material templates and carriers, and achieve good electrochemical performance and electrochemical stability, Uniform product shape and increased migration speed

Inactive Publication Date: 2020-06-05
XIAMEN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies using it as a template and carrier for composite materials

Method used

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  • Cotton-derived porous carbon electrode material and synthesis method and application thereof
  • Cotton-derived porous carbon electrode material and synthesis method and application thereof
  • Cotton-derived porous carbon electrode material and synthesis method and application thereof

Examples

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preparation example Construction

[0031] The invention provides a method for synthesizing a cotton-derived porous carbon electrode material, comprising the following steps: using cotton as a carbon source, and undergoing pre-carbonization treatment to obtain a porous carbon material; then using cobalt nitrate as a cobalt source, using the porous carbon material As a carrier, cobalt oxide particles are grown in situ on the surface of the porous carbon material through hydrothermal reaction to obtain a composite; the composite is carbonized to obtain a cotton-derived porous carbon electrode material. Using the method of in-situ growth, the porous carbon composite material with uniform surface adhesion can be obtained, so that it has better electrical conductivity.

[0032] Further, the pre-carbonization treatment step includes: ultrasonically cleaning the degreased cotton with an aqueous ethanol solution, drying and cutting into small pieces, and then pre-carbonizing to obtain the porous carbon material, which fa...

Embodiment 1

[0044] In this example, a cotton-derived porous carbon electrode material is synthesized according to the following steps:

[0045] (1) Take 5g of absorbent cotton and ultrasonically clean it with a mixed solution of alcohol and ultrapure water for 10 minutes, then dry the absorbent cotton at 100°C, and then cut it into small pieces smaller than 1mm with scissors;

[0046] (2) Place a small piece of absorbent cotton in a tube furnace at 300°C for pre-carbonization for 30 minutes. After cooling to room temperature, the samples were taken out for later use. Several carbonized samples were taken and soaked in 1mol·L -1 in the cobalt nitrate solution;

[0047] (3) After complete infiltration, put the mixed solution in a 100ml autoclave, react at 180°C and keep it warm for 12h, with a heating rate of 2°C·min -1 , for hydrothermal reaction;

[0048] (4) Filter the mixed solution, wash the obtained solid product with ultrapure water three times and dry it, then calcinate it in th...

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Abstract

The invention discloses a cotton-derived porous carbon electrode material and a synthesis method and application thereof, and relates to the field of nano electrode materials. Cotton as a carbon source and cobalt nitrate as a cobalt source undergo a hydrothermal reaction by an in-situ growth method so that cobalt oxide particles are attached to the surfaces of the biomass particles and a compoundis obtained, and finally, the obtained compound is subjected to one-step carbonization and activation, so that the cotton-derived porous carbon electrode material is obtained. The synthesis method issimple, the obtained product is uniform in morphology and large in specific surface area, the advantages of a large specific surface area and a layered porous structure of a biomass material are combined, heteroatoms are introduced to form a pseudocapacitor, and the pseudocapacitor has better electrochemical performances and electrochemical stability when serving as an electrode material of a supercapacitor and is suitable for being applied to the aspects of energy conversion and storage.

Description

technical field [0001] The invention belongs to the field of nanometer electrode materials, and in particular relates to a cotton-derived porous carbon electrode material and its synthesis method and application. Background technique [0002] co 3 o 4 As a representative electrode material for supercapacitors, which has attracted great research interest, it is considered that RuO 2 the best alternative material. However, due to Co 3 o 4 The wide-bandgap semiconducting nature of the compound is characterized by slow reaction kinetics, low conductivity and easy self-aggregation, resulting in unsatisfactory capacitive performance. Studies have shown that constructing pathways conducive to electron transport and tailoring transition metal oxide (TMO) active materials into different functional structures are two main ways to promote the performance of energy storage devices. With Co 3 o 4 For example, on the one hand, the introduction of highly conductive carbon materials...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01G51/04H01G11/24H01G11/30H01G11/34H01G11/44H01G11/46
CPCC01G51/04C01P2002/72C01P2002/82C01P2002/85C01P2004/03C01P2004/61C01B32/05H01G11/24H01G11/30H01G11/34H01G11/44H01G11/46Y02E60/13
Inventor 孙东亚陈荣强何丽雯黄劲勋
Owner XIAMEN UNIV OF TECH
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