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

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 ...

AI Technical Summary

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 long-term performance.

How to effectively improve the specific capacity of the whole carbonized wood chips and the stability of energy storage devices is still a challenge

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