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Preparation method of metallic single-walled carbon nanotube-graphene aerogel composite electrode material

A single-walled carbon nanotube and graphene aerogel technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve problems such as low specific capacitance, and achieve reduced electrode resistance, good skeleton support, The effect of improving electrical performance

Active Publication Date: 2019-04-05
江西宏柏新材料股份有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a metallic single-walled carbon nanotube-graphene airgel composite electrode material in order to solve the technical problem that the specific capacitance of the existing graphene and carbon nanotube composite electrode material is low

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  • Preparation method of metallic single-walled carbon nanotube-graphene aerogel composite electrode material
  • Preparation method of metallic single-walled carbon nanotube-graphene aerogel composite electrode material
  • Preparation method of metallic single-walled carbon nanotube-graphene aerogel composite electrode material

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specific Embodiment approach 1

[0024] In this embodiment, the preparation method of the metallic single-walled carbon nanotube-graphene airgel composite electrode material is carried out according to the following steps:

[0025] 1. Pretreatment of single-walled carbon nanotubes:

[0026] Burn 10-60mg of single-walled carbon nanotubes prepared by arc discharge method at 350°C-380°C for 1.5-2.5h, then acidify with concentrated acid for 24-36h, and then add to 250mL with a mass concentration of 20% In the aqueous solution of the imidazolium-based ionic liquid, ultrasonic crushing for 12-24h, ultra-high-speed centrifugation under the condition of 15000-25000rpm / min, the supernatant was taken;

[0027] Described concentrated acid is that the concentrated hydrochloric acid that concentration is 12mol / L, the concentrated nitric acid that concentration is 16mol / L, the concentrated hydrochloric acid that concentration is 12mol / L and the concentrated sulfuric acid that concentration is 18mol / L are the mixed liquor t...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the imidazolium-based ionic liquid in step 1 is 3-n-butyl-1-methylimidazolium fluoroborate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that in step 1, 20-40 mg of single-walled carbon nanotubes prepared by arc discharge method are burned at 360° C. for 1.5 h. Others are the same as in the first or second embodiment.

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Abstract

Provided is a preparation method of a metallic single-walled carbon nanotube-graphene aerogel composite electrode material. The invention relates to a preparation method of a graphene aerogel composite electrode material, and relates to a preparation method of an electrode material. The technical problem that an existing graphene and carbon nano tube composite electrode material is low in specificcapacitance is solved. The method comprises the following steps: 1, pretreating a single-walled carbon nanotube; 2, enriching the metallic single-walled carbon nanotubes; 3, preparing the composite aerogel; and 4, preparing the composite electrode electric material. By doping the metallic single-walled carbon nanotubes, the conductivity and specific capacitance of the composite electrode materialare effectively improved, and the electrode material can realize mass production on a certain scale, which are metallic single-walled carbon nanotubes. The further application of the graphene aerogelcomposite electrode material provides greater possibility. The invention belongs to the field of preparation of electrode materials.

Description

technical field [0001] The invention relates to a preparation method of an electrode material. Background technique [0002] Graphene is a new type of two-dimensional graphite sheet material with a unique spatial network structure. Graphene airgel obtained by a series of treatments on graphene is loose and porous, has a large specific surface area, and is widely used as a battery electrode material due to its excellent electrical conductivity. For example, in the graphene and carbon nanotube composite electrode material prepared in the authorized patent CN 103258656 A, it has certain electrical stability, but its specific capacitance is low, which has great limitations in practical applications. At the same time, metallic single-walled carbon nanotubes, which are also nanocarbon materials, have more excellent electrical conductivity and stability, and are expected to be widely used in the field of materials as nanowires. However, the progress in the application of metallic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/36
CPCH01G11/24H01G11/36H01G11/86Y02E60/13
Inventor 纪冠丞张磊李季
Owner 江西宏柏新材料股份有限公司
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