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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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  • Abstract
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  • Claims
  • 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 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

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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