A kind of preparation method of ionic liquid gel-based all-gel supercapacitor

Abstract

The invention relates to a preparation method of an ion liquid gel-based all-gel supercapacitor. The preparation method comprises the following steps of performing mixing and grinding on a carbon nanotransistor and an ion liquid, and then enabling PVDF-HFP and acetylene black to be mixed, and carrying out high-temperature stirring and then solvent evaporation to obtain a gel electrode; performingmixing on a monomer, a crosslinking agent and the high-electrical conductivity ion liquid at the room temperature, and next, adding a photoinitiator to perform glue forming under ultraviolet light toobtain an ion gel electrolyte; and coating the upper and lower surfaces of the ion gel electrolyte with the gel electrodes uniformly through a coating mode, and carrying out high-temperature drying toobtain an integrated all-gel material with a gel electrode-gel electrolyte-gel electrode sandwich structure, and by adopting an aluminum foil as a current collector to be connected with an external circuit to obtain the product. Compared with the prior art, the electrode-electrolyte interface electron-ion conduction capability is reinforced, so that fusion of the electrode-electrolyte interface is promoted, interface resistance is lowered, and the tolerant temperature range is wider.

Description

technical field [0001] The invention belongs to the field of polymer gel material preparation and new energy materials, and in particular relates to a preparation method of an ionic liquid gel-based full-gel supercapacitor. Background technique [0002] Gels are divided into hydrogels, aerogels, and organic solvent gels according to different dispersion media. Ionic liquid is a new type of green solvent, which is widely used in the energy field (lithium-ion batteries, supercapacitors) because of its non-volatility, safety and non-flammability, high electrical conductivity, and excellent thermal stability due to its almost no saturated vapor pressure. . [0003] In 2003, Aida et al. (Science 2003, 300, 2072-2218) combined single-walled carbon nanotubes with ionic liquids to form a physically cross-linked gel, because carbon nanotubes are also known as "bucky tubes" (English name Bucky Tube), so the gel was named Bucky Gel for the first time. Researchers found that single-w...

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Problems solved by technology

[0006] As an energy storage device, supercapacitors have the outstanding advantage of being able to charge and discharge quickly, but supercapacitors have a shortcoming of low energy storage, which largely limits their applications.

For a long time, researchers have tried to find ways to maintain the advantages of fast charging and discharging and improve the storage capacity from the perspectives of electrodes and electrolytes, and with the development of smart wearable devices in recent years, the flexibility of energy storage devices has great significance. High requirements, but no substantive breakthrough

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