Chinese fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide and preparation method thereof, and super capacitor

A technology of carbon nanotubes and manganese dioxide, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as poor conductivity and unsatisfactory long-term performance, and achieve the effect of improving stability and cycle performance

Active Publication Date: 2019-08-02
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Problems solved by technology

These active substances randomly accumulate on the inner wall of wood tracheids through weak interactions, which have poor electrical conductivity and unsatisfactory lo

Method used

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  • Chinese fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide and preparation method thereof, and super capacitor
  • Chinese fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide and preparation method thereof, and super capacitor
  • Chinese fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide and preparation method thereof, and super capacitor

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Embodiment 1

[0045] The Chinese fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide is obtained by activation treatment, chemical vapor deposition and electrochemical deposition of the carbonized fir sheet; after the activation treatment, the carbonized fir sheet is A neat and straight tracheid structure from top to bottom is formed; the chemical vapor deposition includes CO 2 Chemical vapor deposition of carbon nanotubes on the sheet-like fir sheet after activation, so that carbon nanotubes grow on the inner wall of the tracheid structure; Manganese dioxide is deposited.

[0046] The preparation method of the fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide of the present embodiment is,

[0047] 1) After natural air-drying, the Chinese fir wood processing residue block is cut into a thickness of 1mm.

[0048] 2) carbonization, place the Chinese fir block in step 1) in a hot air drying oven at 250°C for pre-carbonization ...

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Abstract

The invention relates to a Chinese fir carbon sheet electrode material based on carbon nanotubes and manganese dioxide. The electrode material is characterized in that carbonized flaky fir pieces obtained through activation treatment, chemical vapor deposition and electrochemical deposition are included, after activation treatment, a tubular cell structure which is neat and straight from top to bottom is formed in the carbonized flaky fir pieces, chemical vapor deposition involves chemical vapor deposition of the carbon nanotubes on the flaky fir pieces after CO2 activation, the carbon nanotubes are grown on an inner wall of the tubular structure, and electrochemical deposition involves electrochemical deposition of the manganese dioxide around the carbon nanotubes on the flaky fir piecesafter chemical vapor deposition. The electrode material is advantaged in that the carbon nanotubes are prepared on the inner wall of the Chinese fir tracheid by chemical vapor deposition, the MnO2 iselectrochemically deposited on the inner surface of the tracheid, and device stability and cycle performance are improved.

Description

technical field [0001] The invention relates to an electrode material of a supercapacitor, in particular to an electrode material of a fir carbon sheet based on carbon nanotubes and manganese dioxide, a preparation method and a supercapacitor. Background technique [0002] Biomass materials have the advantages of wide sources, environmental friendliness, green sustainability, and unique directional structure, and have broad application prospects in the field of energy storage. After carbonization and activation of biomass materials, the specific capacitance is effectively improved, and the specific surface area can be obtained by 2000-3000m 2 g -1 powdered biomass carbon material. However, the use of binders in powdered activated carbon electrode materials increases the resistance to charge transfer, thereby limiting the increase in specific capacity. Therefore, whole biomass materials such as carbonized activated wood chips have better application prospects as electrode ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/34H01G11/36H01G11/46H01G11/86
CPCH01G11/24H01G11/30H01G11/34H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 罗勇锋张森吴陈灵周璀吴维邓圆圆王欣李贤军陈道勇
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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