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Modification method for anode activated charcoal of ultracapacitor

A technology of supercapacitors and modification methods, applied in capacitors, capacitor manufacturing, circuits, etc., can solve the problems of narrow electrochemical window, affecting the weight specific energy characteristics of carbon-based supercapacitors, and low capacitance

Inactive Publication Date: 2004-03-17
江苏隆源双登电源有限公司
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Problems solved by technology

All kinds of activated carbon produced in China are usually obtained by thermal decomposition of coconut shell, coal, wood and some organic polymers in a non-oxidative atmosphere, and are mainly used in the fields of filtration and catalysis. Lower, the working electrochemical window is narrower, which affects the weight specific energy characteristics of carbon-based supercapacitors

Method used

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  • Modification method for anode activated charcoal of ultracapacitor
  • Modification method for anode activated charcoal of ultracapacitor
  • Modification method for anode activated charcoal of ultracapacitor

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Embodiment Construction

[0008] Use one of the above schemes to modify the activated carbon material for the positive electrode of the supercapacitor. The specific surface area of ​​the activated carbon used in the experiment is 1000-1500m 2 / g, the particle size is 200-300 mesh, and it has been pre-treated with sulfuric acid and nitric acid before mixing the paste.

[0009] At room temperature, pretreated activated carbon was mixed with 0.05 mol / l Co(NO 3 ) 2 Vacuum impregnation in the solution at 40°C for 3 hours, suction filtration, and then adding an excess of 9mol / l KOH solution for immersion and alkalization for 1 hour, at this time a layer of nano-scale Co(OH) was deposited in the micropores of the activated carbon. 2 The modified layer was suction-filtered until the pH was less than 7.5, and dried at 100° C. for 6 hours to complete the cobalt modification.

[0010] The activated carbon modified by impregnating cobalt was mixed with 3mol / l Ni(NO 3 ) 2 and 0.09mol / l Co(NO 3 ) 2 Vacuum impr...

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Abstract

A process for the modification of activated charcoal material for the use of super capacitor negative electrode, wherein a nanometer level lead phosphate or lead cobalt modification layer is first formed in the activated charcoal micropore, After modification, the capacity of the active compound is increased, the electrochemical window is expanded by about 200 mV, thus improving the weight ratio energy capacity of the charcoal group super capacitor. íí

Description

technical field [0001] The invention relates to a method for modifying an activated carbon material for a positive electrode of a supercapacitor, in particular to a method for modifying an activated carbon material to deposit a cobalt modification layer and a cobalt-nickel composite modification layer, and belongs to the technical field of supercapacitors. Background technique [0002] A supercapacitor is an excellent compact energy source located between batteries and traditional capacitors. It has large energy storage, light weight, large specific capacity, large specific power (1500W / kg), good high-current discharge performance, and fast charging ( It can be several seconds), and the number of cycles is large (in the order of 10 5 Meter), low temperature resistance (-50 ℃), maintenance-free, low pollution and other outstanding advantages, it can be used as an independent power supply or a compound power supply, and is widely used in the fields of starting, traction power,...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G13/00
CPCY02E60/13
Inventor 阎智刚褚德威唐民洪衡建坡管雄俊陈怀林
Owner 江苏隆源双登电源有限公司
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