Supercapacitor applying core-shell porous carbon nanomaterial

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: 2016-02-03
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
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, the core-shell porous nanocarbon material is a carbon nanotube as the core, and the outer layer of the core is uniformly coated with a nanoscale porous carbon layer (thickness is 0.05 μm, pore diameter is 50nm, specific surface area is 300m 2 / g), the core is a carbon nanotube with one layer (the 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 is 0.1 μm, pore diameter is 40 nm, specific surface area is 500 m 2 / g), the core is a 2-layer stacked carbon nanotube (the 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 takes carbon nanotubes as the core, and the outer layer of the core is evenly coated with a nano-scale porous carbon layer (thickness is 0.3 μm, pore diameter is 35 nm, specific surface area is 700 m 2 / g), the core is a 3-layer stacked carbon nanotube (the 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, in particular to a supercapacitor using a core-shell porous nanometer carbon material. Background technique [0002] Supercapacitors (ultracapacitors), also known as Electrochemical Capacitors (Electrochemical Capacitors), Electric Double-Layer Capacitors (Electrical Double-Layer Capacitor), gold capacitors, and farad capacitors, were developed in the 1970s and 1980s through polarized electrolytes. An electrochemical element for energy storage. It is different from traditional chemical power sources. It is a power source with special properties between traditional capacitors and batteries. It mainly relies on electric double layers and redox pseudocapacitive charges to store electrical energy. However, no chemical reaction occurs in the process of its energy storage. This energy storage process is reversible, and it is precisely because this supercapacitor can be repeatedly charged and discharged hundreds of thous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/36
CPCY02E60/13
Inventor 阮殿波崔超婕乔志军
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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