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A self-supporting electrode and its preparation and application

A self-supporting structure and electrode technology, which is applied in the direction of structural parts, battery electrodes, hybrid capacitor electrodes, etc., can solve the problems of high price and severe toxicity, improve the utilization rate, save the pressing process, and the preparation process is simple and reliable. control effect

Active Publication Date: 2018-09-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although noble metal oxides have good Faraday capacitance, their high price and severe toxicity greatly restrict their application as electrode materials for supercapacitors.

Method used

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  • A self-supporting electrode and its preparation and application
  • A self-supporting electrode and its preparation and application
  • A self-supporting electrode and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix nickel nitrate and hexamethylenetetramine in water at a molar ratio of 1:1, add 28% ammonia water to adjust the pH value to 8, stir for 0.5h, and then transfer to a hydrothermal reaction kettle to form solution A; The mass concentration of solid matter in solution A is 10%, put 4×4cm carbon cloth (thickness is 1mm, porosity 10%) into solution A at 45°, and react at 80°C for 12h to obtain B; After cleaning with acetone, add it to the solution C containing dimethylimidazole (C is a mixture of N-N dimethylformamide and water, the ratio is (1:1)); the amount of C added is suitable for submerging the current collector , 100°C for 12h, washed with water and ethanol to obtain C; C was calcined at 500°C for 5h under Ar conditions to obtain the target product D. Cut the obtained product into small discs with a diameter of 14mm, weigh them, and dry them in vacuum at 60°C for 24 hours. Use the small discs as the working electrode, platinum as the counter electrode, saturated c...

Embodiment 2

[0033] Take cobalt nitrate and hexamethylenetetramine at a molar ratio of 1:1 and mix them evenly in ethanol, then add 28% ammonia water to adjust the pH value to 10, stir for 5 hours and then transfer to a hydrothermal reaction kettle to form solution A; The concentration of solid matter in solution A is 50%. Put 4×4cm nickel foam vertically into solution A with a thickness of 1mm and a porosity of 90%. React at 100°C for 24 hours to obtain B; clean B with acetone and add Add to solution C containing dimethylimidazole, (C is a mixture of N-N dimethylformamide and water, the ratio is (4:1)); the amount of C added is suitable for submerging the current collector, and the temperature is kept at 50°C for 12h , washed with water and ethanol to obtain C; C was calcined at 1000°C for 2h under Ar conditions to obtain the target product D. Cut the obtained product into small discs with a diameter of 14mm, weigh them, and dry them in vacuum at 60°C for 24 hours. Use the small discs as ...

Embodiment 3

[0036]Mix potassium permanganate and hexamethylenetetramine in water at a molar ratio of 1:1, add 0.5M sodium hydroxide to adjust the pH to 9, stir for 5 hours, and then transfer to a hydrothermal reaction kettle to form a solution A; the concentration of solid matter in solution A is 50%. Put 4×4cm carbon paper vertically into solution A with a thickness of 10 μm and a porosity of 60%. React at 90°C for 24 hours to obtain B; wash B with acetone After cleaning, add it to the solution C containing dimethylimidazole (C is a mixture of N-N dimethylformamide and water, the ratio is (3:1)); the amount of C added is suitable for submerging the current collector, 70 ℃ for 12h, washed with water and ethanol to obtain C; C was calcined at 900℃ for 3h under Ar condition to obtain the target product D. Cut the obtained product into small discs with a diameter of 14mm, weigh them, and dry them in vacuum at 60°C for 24 hours. Use the small discs as the working electrode, platinum as the co...

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Abstract

The present invention discloses an electrode with self-support structure, and a preparation method thereof, and an application thereof. The electrode comprises a conductive collector and electrode active materials; and the electrode active materials are in in-situ growth at the surface of the conductive collector in a nanorod array mode, wherein the electrode active materials are metallic oxide coated with carbon quantum dots, the taking amount on the electrode is 0.5-30mg / cm2, and preferably, the taking amount on the electrode is 1-10mg / cm2. The electrode provided by the invention is low in impedance, fast in electrical transmission and large in specific capacity of the electrode, and the preparation process is simple and has wide applicability.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to supercapacitor electrode materials and preparation methods thereof. Background technique [0002] A supercapacitor is a new concept energy storage device between a battery and a traditional electrostatic capacitor. It has a higher specific capacitance and can store more than 10 times the energy density of a traditional electrostatic capacitor. Capacitors have greater power density, high charge and discharge efficiency, and long cycle life. Due to the above advantages, the development of supercapacitor technology has been sought after by researchers. However, the main problem faced by supercapacitors is their relatively low energy density. The electrochemical activity of electrode materials directly determines the capacitive performance of the device. Therefore, the development of active electrode materials has become the focus of research and application of supercapacitors. Elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/46H01G11/86H01G11/12H01M4/36H01M4/583H01M4/48H01M4/50H01M4/52H01M4/131H01M4/133H01M4/1391H01M4/1393H01M10/052
CPCH01G11/12H01G11/30H01G11/32H01G11/46H01G11/86H01M4/131H01M4/133H01M4/1391H01M4/1393H01M4/362H01M4/483H01M4/502H01M4/523H01M4/583H01M10/052Y02E60/10
Inventor 王美日张华民张洪章黄安然刘翠连李先锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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