A core-shell porous carbon nanomaterial for supercapacitor electrodes

A nano-carbon material, super capacitor technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of small diameter of carbon nanotubes, large van der Waals force, difficult to mix evenly, etc., and achieve the effect of long service life

Active Publication Date: 2016-11-16
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 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 core-shell porous nano-carbon material applied to supercapacitor electrodes disclosed by the present invention has a core-shell porous nano-carbon material with carbon nanotubes as the core, and the outer layer of the core is uniformly coated with a nano-scale porous carbon layer, and the core The part is single-walled carbon nanotubes or multilayered carbon nanotubes. The material of the invention has the advantages of good electrical conductivity, large specific surface area, rich pore structure and short ion diffusion distance, and is beneficial to obtaining high specific capacity, low internal resistance, high rate performance and long cycle life when used as an electrode material.

Description

technical field [0001] The invention relates to a capacitor electrode material, in particular to a core-shell porous nano-carbon material applied to a supercapacitor electrode. Background technique [0002] Supercapacitors (ultracapacitor), also known as Electrochemical Capacitors (Electrochemical Capacitors), Electric Double-Layer Capacitors (Electrical Double-Layer Capacitor), gold capacitors, farad capacitors, are developed from the 1970s and 1980s through polarization An electrochemical element that stores energy with electrolytes. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/36H01G11/34H01G11/24
CPCY02E60/13
Inventor 阮殿波黄庆福乔志军
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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