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A kind of electrode material of supercapacitor

A technology for supercapacitors and electrode materials, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of poor voltage retention performance, large leakage current, and high impurity content, and achieve good conductivity, wide application range, and rich nitrogen content. Effect

Inactive Publication Date: 2016-04-13
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the high impurity content of this type of activated carbon, the leakage current is large and the voltage retention performance is poor (Carbon, 2007.45(7): p.1439-1445; Journal of Power Sources, 2008.175(1): p.675-679.)

Method used

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  • A kind of electrode material of supercapacitor
  • A kind of electrode material of supercapacitor
  • A kind of electrode material of supercapacitor

Examples

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preparation example Construction

[0021] In the preparation method of the electrode material of the present invention, the polymerization reaction conditions generally include the temperature of contact and the time of contact, and the temperature of the contact only needs to ensure that the metal salt is in a molten state, so the contact The temperature can be from the melting point of the metal salt to lower than the boiling point of the metal salt, preferably, the temperature is 400-700° C.; the optional range of the contact time is wide, and in order to carry out the polymerization reaction more completely, the The contact time may be more than 20 hours, preferably, the contact time is 20-80 hours, more preferably, the contact time is 40-50 hours.

[0022] Since the temperature required to keep the metal salt in a molten state is generally high, the reaction in an open system may cause some unstable factors due to the difference in the environment. Preferably, the contact is carried out under an inert atmo...

Embodiment 1

[0033] This example is used to illustrate the preparation of the supercapacitor electrode material provided by the present invention.

[0034] Mix 1g (7.81mmol) of terephthalonitrile (p-DCB) and 5.32g (39.04mmol) of anhydrous zinc chloride, and transfer to a 10ml glass tube, replace the air in the glass tube with argon, After sealing it, put it in a muffle furnace, react at 550°C for 40 hours, cool it down to room temperature (25°C) naturally, open the glass tube, take out the polymerized product, and wash it with 5% by weight hydrochloric acid, purified water, tetrahydrofuran After washing, put it into an oven, and dry it at 120° C. for 10 hours to obtain an electrode material.

[0035] from figure 1 It can be seen that the electrode material prepared by this example has a loose and porous network structure.

[0036] Depend on figure 2 According to the calculated data, the BET specific surface area of ​​the prepared electrode material is 1724.74m 2 / g, the pore size dist...

Embodiment 2

[0038] This example is used to illustrate the preparation of the supercapacitor electrode material provided by the present invention.

[0039] The electrode material was prepared according to the method of Example 1, except that 1 g (7.81 mmol) of isophthalonitrile (m-DCB) was used as the raw material instead of 1 g (7.81 mmol) of terephthalonitrile (p-DCB). The BET specific surface area of ​​the prepared electrode material is 1622m 2 / g, the pore size distribution of the electrode material is calculated by DFT method between 0.6-9nm.

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Abstract

The invention discloses an electrode material of a super-capacitor. The electrode material is a product obtained by polymerizing aromatic nitrile compound monomers. The electrode material has the high specific surface area, the abundant nitrogen content and the porous mesh-shaped structure, and the super-capacitor composed of the electrode material has the advantages of being high in specific capacitance and capable of being rapidly charged and discharged, having good circulation stability and the like. In addition, the electrode material can be suitable for various super-capacitor containers such as acid system containers, alkali system containers and organic solution system containers, and is wide in application range. Compared with an existing commercial activated carbon electrode material or other electrode materials, the electrode material has the advantages of being easy to prepare, efficient, environmentally friendly, low in cost, excellent in performance and the like.

Description

technical field [0001] The invention relates to an electrode material, in particular to an electrode material for a supercapacitor. Background technique [0002] As an energy storage device, supercapacitor has relatively simple working principle, high charge and discharge rate (power density), good stability and service life, so it has become the object of extensive attention and research (Nat.Mater.,2008.7 (11): p.845-854; Chem.Soc.Rev., 2009.38(9):p.2520-2531.). However, compared with lithium batteries, the energy density of supercapacitors is still relatively small (Science, 2008.321(5889): p.651-652.), and its energy density can be obtained by E=0.5CU 2 Calculate (C: specific capacitance, unit F / g; U: voltage, unit V), so when the voltage is the same, the energy density can be increased by increasing the specific capacitance. Therefore, it is very important to study substances with high specific capacitance characteristics as electrode materials for supercapacitors. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 智林杰郝龙
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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