Multilayer interdigitated electrochemical capacitor and its preparation method

Abstract

The invention discloses a laminated interdigital electrochemical capacitor and a preparation method thereof. The capacitor is an active self-supporting electrode built in the shell and a diaphragm with electrolytes on both sides alternately superimposed, and the adjacent two electrodes are electrically connected to the positive and negative lead-out terminals respectively. Among them, the electrode is MXene titanium carbide film, etc., and the electrolyte is water or organic Electrolyte, the diaphragm is a water or organic electrolyte diaphragm; the method is to apply the electrolyte on the electrode, paste the diaphragm and apply the electrolyte, and then paste the other electrode on the electrolyte side of the previous electrode, and then place it on it. Apply the electrolyte, paste the diaphragm and apply the electrolyte. After repeating the above process for more than zero times, attach another electrode to the electrolyte side of the multilayer electrode, and then connect the electrodes at both ends of the obtained intermediate product to the positive and negative electrodes respectively. After the negative lead-out terminal is electrically connected, it is packaged in a casing to obtain a product. It is extremely easy to commercialize widely for use as auxiliary power, backup power, main power and replacement power.

Description

technical field [0001] The invention relates to an electrochemical capacitor and a preparation method thereof, in particular to a laminated interdigitated electrochemical capacitor and a preparation method thereof. Background technique [0002] Electrochemical capacitors, also known as supercapacitors, have been successfully used in the fields of national defense, aerospace, automobile industry, consumer electronics, communications, electric power and railways due to their large capacity, high energy density, high current charge and discharge, and long cycle life. application, and its scope of application is still expanding. According to the capacitance, discharge time and discharge capacity, electrochemical capacitors can be mainly used as auxiliary power supply, backup power supply, main power supply and replacement power supply. Recently, people have made unremitting efforts to obtain higher-performance electrochemical capacitors, such as a supercapacitor and its prepara...

AI Technical Summary

Problems solved by technology

Although this supercapacitor has the characteristics of light weight and large specific volume, it has disadvantages with its preparation method. First, the active self-supporting electrodes in the product need to print conductive current-collecting metal grid lines, which not only increases its The complexity of the structure also uses a large number of conductive agents and binders to make good contact between the active self-supporting electrodes and the conductive current collector metal grid lines. These inactive materials—collectors, conductive agents and adhesives The use of additives and the like occupies a large mass ratio and volume ratio in the entire electrochemical capacitor, thereby reducing the overall performance of the product-capacity, energy density and power density; secondly, the preparation method cannot obtain active materials in which there is more Products with high mass ratio and volume ratio

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