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Supercapacitors using core-shell porous nanocarbon materials

A nano-carbon material and supercapacitor technology, applied in the field of capacitance, can solve the problems that the conductivity of carbon nanotubes cannot be well exerted, the diameter of carbon nanotubes is small, and the van der Waals force is large, so as to achieve rich pore structure and low internal Resistance, the effect of increasing the specific capacity

Active Publication Date: 2016-10-05
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small diameter of carbon nanotubes and the large van der Waals force, it is easy to form tube bundles and difficult to disperse, which makes it difficult to mix uniformly when carbon nanotubes and activated carbon are mixed, and the conductivity of carbon nanotubes cannot be well exerted.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0038] In this embodiment, the core-shell porous nano-carbon material uses carbon nanotubes as the core, and the outer layer of the core is uniformly coated with a nano-scale porous carbon layer (thickness of 0.05μm, pore size of 50nm, specific surface area of ​​300m 2 / g), the core is a layer of carbon nanotubes (specific surface area is 250m 2 / g), the specific surface area of ​​the core-shell porous nano-carbon material is 300m 2 / g.

Embodiment 2

[0040] In this embodiment, the core-shell porous nano-carbon material uses carbon nanotubes as the core, and the outer layer of the core is uniformly coated with a nano-scale porous carbon layer (thickness of 0.1 μm, pore size of 40 nm, and specific surface area of ​​500 m). 2 / g), the core is a 2-layer stacked carbon nanotube (specific surface area is 150m 2 / g), the specific surface area of ​​the core-shell porous nano-carbon material is 500m 2 / g.

Embodiment 3

[0042] In this embodiment, the core-shell porous nano-carbon material uses carbon nanotubes as the core, and the outer layer of the core is uniformly covered with a nano-scale porous carbon layer (thickness 0.3μm, pore size 35nm, specific surface area 700m 2 / g), the core is a 3-layer stacked carbon nanotube (specific surface area is 400m 2 / g), the specific surface area of ​​the core-shell porous nano-carbon material is 800m 2 / g.

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PUM

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Abstract

The invention discloses a supercapacitor applying a core-shell porous carbon nanomaterial. The supercapacitor comprises a positive electrode, a negative electrode, an electrolyte and a membrane, wherein the surface of the positive electrode or the negative electrode is coated with a sizing agent; the sizing agent comprises the core-shell porous carbon nanomaterial; the core-shell porous carbon nanomaterial takes a carbon nanotube as a core part, and the outer layer of the core part is uniformly coated by a nano-scale porous carbon layer; and the core part is a single-layered carbon nanotube or a multi-layered carbon nanotube. The supercapacitor has the advantages of high specific capacity, low internal resistance, stable charging and discharging performances, high rate capability, long cycle life and the like.

Description

Technical field [0001] The invention relates to a capacitor, especially a super capacitor using a core-shell porous nano carbon material. Background technique [0002] Supercapacitors (ultracapacitors), also known as electrochemical capacitors (Electrochemical Capacitors), electrical double-layer capacitors (Electrical Double-Layer Capacitors), gold capacitors, farad capacitors, are developed from the 1970s and 1980s through polarization An electrochemical element that uses electrolyte to store energy. It is different from the traditional chemical power supply. It is a power supply with special performance between the traditional capacitor and the battery. It mainly relies on the electric double layer and the redox pseudo-capacitor charge to store electric energy. However, no chemical reaction occurs during the energy storage process. This energy storage process is reversible, precisely because the supercapacitor can be repeatedly charged and discharged hundreds of thousands of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/36
CPCY02E60/13
Inventor 阮殿波黄庆福乔志军
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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