Preparation method of super capacitor

Abstract

The invention relates to a preparation method for a super capacitor, comprising the following steps: (1) placing a foam nickel substrate in a chemical gas phase deposition reacting furnace, introducing argon for 10-60 minutes, exhausting air in the furnace, then heating the furnace to 450-750 DEG C, introducing hydrocarbon gases in an argon atmosphere at a flow rate between 25ml/min and 40ml/min,reacting the mixture for 30 seconds to 50 minutes at a temperature of 450-750 DEG C, and obtaining foam nickel on which carbon nano tubes grow after finishing the reaction; (2) removing surface loosing layer products, directly using the foam nickel substrate on which the carbon nano tubes grow as electrodes of the super capacitor; and (3) drying the electrodes with same thickness and size, which are obtained from the step (2), fully soaking the electrode with electrolyte for 1-36 hours, separating a diaphragm soaked with the electrolyte and assembling the components to obtain the super capacitor; and the hydrocarbon gases are acetylene, methane, ethylene or propylene. The carbon nano tubes directly grow on the foam substrate without a binding agent; and the foam nickel is used as the substrate, the volume density of electrode substances is higher and holes are reasonably distributed.

Description

technical field [0001] The invention belongs to the field of preparation and manufacture of energy storage materials and devices, and in particular relates to a preparation method of a supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage device whose performance is between traditional capacitors and batteries. It has the characteristics of high specific energy of batteries and high specific power of traditional capacitors. Supercapacitors also have the following advantages, such as: 1) they can charge and discharge instantaneously with large currents, 2) they have a high cycle life, 3) they have a wide operating temperature range, and 4) they are safe and pollution-free. Super electric heaters have been widely used as the main power supply of timers, flashlights and electric toys, as well as backup power supplies for computers and mobile phones, etc. Especially in the booming electric vehicles, the combined use of supercapacitors and ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the preparation process and complex equipment in the prior art, simplify the preparation process of supercapacitors, save energy, and prevent environmental pollution; the carbon nanotubes of the present invention are directly grown on the foamed nickel substrate without Binder is used; at the same time, porous nickel foam is used as the substrate, the volume density of the electrode material is higher, and the pore distribution is reasonable

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