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In-situ preparation method of CuO electrode material of ultracapacitor by adopting foamed nickel

An in-situ preparation technology for supercapacitors, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of loose connection, large contact resistance, and easy concentration polarization, etc., and achieve good cycle performance and simple preparation methods , the effect of high specific capacity

Inactive Publication Date: 2011-07-20
HARBIN ENG UNIV
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Problems solved by technology

In this way, not only the utilization rate of the active catalytic substance is low, but also concentration polarization is easy to occur during high current discharge. In addition, the connection between CuO and nickel foam is not tight, and the contact resistance is large, which seriously affects the performance of the supercapacitor.

Method used

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  • In-situ preparation method of CuO electrode material of ultracapacitor by adopting foamed nickel
  • In-situ preparation method of CuO electrode material of ultracapacitor by adopting foamed nickel

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Embodiment Construction

[0016] The following examples describe the present invention in more detail:

[0017] 1. First mix 0.1mol·L -1 Cu(NO 3 ) 2 Mix with 25% ammonia solution by mass, and stir for 20 minutes until a dark blue solution is formed. The mixed solution was preheated at 90°C for 2 hours and then placed in 1-4cm 2 Nickel foam (300-350g m -2 ), then heated (80-95° C.) for 5-8 hours, took out the foamed nickel and dried it to obtain the CuO electrode material prepared in situ by the foamed nickel.

[0018] 2. First mix 0.2mol·L -1 Cu(NO 3 ) 2 Mix with 30% ammonia solution by mass, and stir for 30 minutes until a dark blue solution is formed. The mixed solution was preheated at 90°C for 2 hours and then placed in 1-4cm 2 Nickel foam (300-350g m -2 ), then heated (80-95° C.) for 5-8 hours, took out the foamed nickel and dried it to obtain the CuO electrode material prepared in situ by the foamed nickel.

[0019] 3. First mix 0.3mol·L -1 Cu(NO 3 ) 2 Mix with 30% ammonia solution ...

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Abstract

The invention provides an in-situ preparation method of a CuO electrode material of an ultracapacitor by adopting foamed nickel, which comprises the following steps of: firstly uniformly mixing 0.1-0.3mol / L of Cu(NO3)2 solution and 25-30 wt.% ammonia water; stirring the mixture for 15-30min to form a dark blue mixed solution; preheating the dark blue mixed solution for 2h at a temperature of 90 DEG C, and then adding 1-4cm<2> of the foamed nickel into the preheated dark blue mixed solution; heating for 5-8 hours at a temperature of 80-95 DEG C; and taking out and drying the foamed nickel to obtain the CuO electrode material prepared from the foamed nickel in an in-situ manner, wherein the specific surface area of the foamed nickel is 300-350g / m<2>. The essence of the invention is such that the electrode of the ultracapacitor is prepared by using a foamed nickel in-situ CuO preparation method to replace the method of mixing CuO powder, active carbon and a binding agent and pressing the mixture on the foamed nickel, by adopting the structure of the ultracapacitor. In the invention, the preparation method is simple, the specific capacity is high, and the circulation performance is good.

Description

technical field [0001] The invention relates to a method for preparing an electrode material, in particular to a method for preparing a CuO electrode material in situ from nickel foam. Background technique [0002] A supercapacitor is an energy storage element that uses the electrochemical process on the surface of an electrode / solution to store charges, also called an electrochemical capacitor. It has the advantages of fast charging and discharging, long life, wide working temperature limit, good voltage memory, and maintenance-free. It is a new, efficient and practical energy storage device. [0003] In order to further increase the energy density of supercapacitors, hybrid supercapacitors have been developed in recent years. Hybrid supercapacitors are capacitors that use metal oxides and activated carbon as the positive and negative electrode materials respectively. Its working mechanism is mainly the principle of electric double layer and the principle of Faraday quasi-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 王贵领莫英华王莎莎常莎曹殿学汤胜
Owner HARBIN ENG UNIV
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