Long linear super capacitor with high power and preparation method thereof

Abstract

The invention relates to a long linear super capacitor with high power. The long linear super capacitor comprises a conductive substrate, an active material, and a gel electrolyte. The active material is arranged on the conductive substrate through drop casting. The active material is coated by a carbon nanotube film which is coated by the gel electrolyte. The conductive substrate is a sandwich structure of sequential carbon nanotube film / silver nanowires / sequential carbon film. The active material is a GO / MCNTs complex. The gel electrolyte is a PVA / H3PO4 electrolyte. A preparation method of the long linear super capacitor comprises the steps of depositing the active material on the sandwich structure of sequential carbon nanotube film / silver nanowires / sequential carbon film, twisting to form linear electrodes, and finally preparing the long linear super capacitor through twisting by using two same linear electrodes. According to the long linear super capacitor and the method, the efficiency is high, the stability is good, the realization of industrialized production is facilitated, the axial conductivity of the long linear super capacitor is improved, and thus the power characteristic of the long linear super capacitor is improved.

Description

technical field

[0001] The invention relates to a high-power long-linear supercapacitor and a preparation method thereof. Background technique

[0002] With the rapid development of lightweight, flexible, and wearable electronic devices, the energy storage systems that provide energy for them also need to develop in a flexible and efficient direction. Among them, linear flexible supercapacitors are considered to be one of the most promising candidates due to their high power density, fast charge-discharge rate, good flexibility and weavability, light weight, low cost, and environmental friendliness. . Fibers can be processed into two-dimensional or even three-dimensional flexible lightweight materials by weaving, knotting, sewing and other means, which are widely used in daily life, transportation, industrial production, aerospace and national defense security and other fields. Carbon materials (such as activated carbon, carbon nanotubes, graphene, etc.) have excellent ele...

Examples

Embodiment 1

[0036] Step 1: Material preparation: put glass slices into deionized water and ethanol for ultrasonic cleaning for 20 minutes, and blow dry with nitrogen; carbon nanotube powder treatment: put 0.5g of carbon nanotube powder into concentrated nitric acid and water with a volume ratio of 1 : In 60ml acid solution of 2, stir and soak for more than 6 hours, then pour the turbid solution into a centrifuge tube and centrifuge until neutral, take it out and bake it in a vacuum oven at 80°C for 12 hours to remove some of the carbon nanotube powder Impurity ions.

[0037] Step 2: Configuration of the active substance dispersion: Add 0.08gGO and 0.08gMCNTs to 40mL DMF solution respectively, sonicate in an ice bath in a 600W ultrasonicator for 3 hours, and prepare 2mg / ml solutions respectively, and then measure 20mlGO solution Mix with 10ml MCNTs solution and sonicate for 1 hour.

[0038] Step 3: Preparation of supercapacitor single electrode: use a blade to scrape out a film with a width...

Embodiment 2

[0042] The difference between this embodiment and embodiment 1 is: in step 3, the length of the glass sheet is changed to 30 cm, the amount of dispensing is changed to 480 μl, the number of twisting revolutions is changed to 2400, and the rest of the steps are the same as in embodiment 1.

technical field

[0001] The invention relates to a high-power long-linear supercapacitor and a preparation method thereof. Background technique

[0002] With the rapid development of lightweight, flexible, and wearable electronic devices, the energy storage systems that provide energy for them also need to develop in a flexible and efficient direction. Among them, linear flexible supercapacitors are considered to be one of the most promising candidates due to their high power density, fast charge-discharge rate, good flexibility and weavability, light weight, low cost, and environmental friendliness. . Fibers can be processed into two-dimensional or even three-dimensional flexible lightweight materials by weaving, knotting, sewing and other means, which are widely used in daily life, transportation, industrial production, aerospace and national defense security and other fields. Carbon materials (such as activated carbon, carbon nanotubes, graphene, etc.) have excellent ele...

Examples

Embodiment 1

[0036] Step 1: Material preparation: put glass slices into deionized water and ethanol for ultrasonic cleaning for 20 minutes, and blow dry with nitrogen; carbon nanotube powder treatment: put 0.5g of carbon nanotube powder into concentrated nitric acid and water with a volume ratio of 1 : In 60ml acid solution of 2, stir and soak for more than 6 hours, then pour the turbid solution into a centrifuge tube and centrifuge until neutral, take it out and bake it in a vacuum oven at 80°C for 12 hours to remove some of the carbon nanotube powder Impurity ions.

[0037] Step 2: Configuration of the active substance dispersion: Add 0.08gGO and 0.08gMCNTs to 40mL DMF solution respectively, sonicate in an ice bath in a 600W ultrasonicator for 3 hours, and prepare 2mg / ml solutions respectively, and then measure 20mlGO solution Mix with 10ml MCNTs solution and sonicate for 1 hour.

[0038] Step 3: Preparation of supercapacitor single electrode: use a blade to scrape out a film with a width...

Embodiment 2

[0042] The difference between this embodiment and embodiment 1 is: in step 3, the length of the glass sheet is changed to 30 cm, the amount of dispensing is changed to 480 μl, the number of twisting revolutions is changed to 2400, and the rest of the steps are the same as in embodiment 1.

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