Preparation method of ion liquid gel-based all-gel supercapacitor

A technology of supercapacitors and ionic liquids, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problems of low energy storage of supercapacitors and no substantial breakthroughs, and achieve increased capacitance , Enhanced electron-ion conductivity and stable performance

Active Publication Date: 2018-10-09
TONGJI UNIV
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  • Application Information

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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 advanta

Method used

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  • Preparation method of ion liquid gel-based all-gel supercapacitor
  • Preparation method of ion liquid gel-based all-gel supercapacitor
  • Preparation method of ion liquid gel-based all-gel supercapacitor

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Embodiment

[0034] A preparation method for an ionic liquid gel-based all-gel supercapacitor, comprising the following steps:

[0035] 1. Preparation of gel electrode: first mix 40mg of carbon nanotubes with ionic liquid, grind them on a mortar, remove them with a hanging spoon after 20 minutes, put them into a 5ml glass bottle, and then continue to add 2.5ml of the used solvent 4-methyl-2-pentanone, dissolved at 80°C in PVDF-HFP high-temperature solution, and finally mixed with 10mg of acetylene black, and continued to stir at 80°C for 4 hours to form a high-temperature solution Viscous solution, the viscous solution will form a colloidal state after cooling down, which is a weakly physically cross-linked gel. The resulting gel is macroscopically photographed and the resulting gel is lyophilized and photographed for scanning electron microscopy, as in figure 1 , as shown in 2.

[0036] 2. Take the monomer N,N-dimethylacrylamide (DMAA) with a mass fraction of 5% to 20%, and the crosslin...

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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-armed 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-ar...

Claims

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Application Information

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IPC IPC(8): H01G11/84H01G11/86H01G11/30H01G11/36H01G11/56
CPCH01G11/30H01G11/36H01G11/56H01G11/84H01G11/86Y02E60/13
Inventor 尹成尧王启刚周杰
Owner TONGJI UNIV
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