Solid-state stacked interdigitated electrochemical capacitor and its preparation method

Abstract

The invention discloses a solid laminated interdigital electrochemical capacitor and a preparation method thereof. The capacitor is an active self-supporting electrode and an electrolyte layer alternately stacked, and the adjacent two electrodes are electrically connected to the positive and negative electrode lead-out terminals respectively, where the electrode is MXene titanium carbide film or MXene carbon nanotube composite film or MXene graphene composite film , the electrolyte layer is a gel electrolyte; the method is to first coat the gel electrolyte on the upper surface of the active self-supporting electrode and place it under vacuum for 1min, and then stick the other electrode on the gel electrolyte side of the previous electrode, Coat the gel electrolyte on its surface and put it under vacuum for 1min. After repeating the above process for more than zero times, attach another electrode to the side of the gel electrolyte of the multilayer electrode, and then place the obtained intermediate The electrodes at both ends of the product are respectively electrically connected to the lead-out terminals of the positive and negative electrodes to obtain the 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 solid 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 p...

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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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