| abstract |
The invention discloses a preparation method of a carbon nanotube/manganese dioxide composite electrode, comprising the following steps: 1) ultrasonically cleaning carbon cloth, ultrasonically treating the carbon cloth in a nitric acid solution, and drying the carbon cloth; 2) placing a carbon nanotube in the nitric acid solution for ultrasonic oscillation, filtering, drying, calcining and grinding; 3) ultrasonically dispersing the carbon nanotube in absolute ethyl alcohol and then spraying it on the carbon cloth to obtain the carbon cloth loaded with the carbon nanotube; 4) carrying out hydrothermal reaction on the carbon cloth loaded with the carbon nanotube and a mixed solution of potassium permanganate, potassium sulfate and manganese sulfate to obtain the carbon nanotube/manganese dioxide composite electrode. The prepared composite electrode in the invention has a large specific capacitance and good flexibility, and can be applied to a super capacitor to develop a lightweight and flexible super capacitor. The capacitance of the super capacitor reaches 22.7mF-76.5mF, and 29.6mF-106.6mF after bending. The capacitance characteristic is still stable when deformation occurs. |