Preparation method and application of core-shell-structured nickelous hydroxide or hierarchical porous carbon composite material

A carbon composite material and hierarchical porous technology, which is applied in the preparation/purification of carbon, nickel oxide/nickel hydroxide, microsphere preparation, etc., can solve the problems of high preparation cost, low energy density of supercapacitors, and difficult application of supercapacitors, etc. problem, to achieve the effect of improving utilization rate, improving electrochemical performance and excellent performance

Inactive Publication Date: 2013-02-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the shortcomings of the supercapacitor's own low energy density and high manufacturing cost, it is still difficult for supercapacitors to be practically applied.

Method used

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  • Preparation method and application of core-shell-structured nickelous hydroxide or hierarchical porous carbon composite material
  • Preparation method and application of core-shell-structured nickelous hydroxide or hierarchical porous carbon composite material
  • Preparation method and application of core-shell-structured nickelous hydroxide or hierarchical porous carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 0.04 g of self-made hierarchical porous carbon was dispersed in 1 M sulfuric acid solution, heated to 60 °C for acidification for 6 hours, filtered, washed with deionized water until neutral, and dried at 60 °C for 8 hours to obtain acidified hierarchical porous carbon spheres. Disperse 0.04 g of acidified hierarchical porous carbon in 60 ml of deionized water and sonicate for 15 min to fully disperse. Add 0.291 g Ni (NO 3 ) 2 ·6H 2 O, stir for 15 minutes until uniformly dissolved, then add 0.701 g of HMT, and continue stirring for 10 minutes to obtain a mixed solution. Finally, the mixed solution was transferred to a hydrothermal reactor, sealed, and reacted at 80°C for 12 hours; after the hydrothermal reactor was naturally cooled to room temperature, it was filtered, washed and separated with deionized water and absolute ethanol, and dried to obtain hydroxide. Nickel / hierarchical porous carbon composites.

Embodiment 2

[0029] 0.04 g of self-made hierarchical porous carbon was dispersed in 1 M sulfuric acid solution, heated to 60 °C for 6 hours, acidified, filtered, washed with deionized water until neutral, and dried at 60 °C for 8 hours to obtain acidified hierarchical porous carbon spheres. Disperse 0.04 g of acidified hierarchical porous carbon in 60 ml of deionized water and sonicate for 15 min to fully disperse. Add 0.146 g Ni (NO 3 ) 2 ·6H 2 O, stir for 15 minutes until uniformly dissolved, then add 0.351 g of HMT, and continue stirring for 10 minutes to obtain a mixed solution. Finally, the mixed solution was transferred to a hydrothermal reactor, sealed, and reacted at 80°C for 12 hours; after the hydrothermal reactor was naturally cooled to room temperature, it was filtered, washed and separated with deionized water and absolute ethanol, and dried to obtain hydroxide. Nickel / hierarchical porous carbon composites.

[0030] The nickel hydroxide / hierarchical porous carbon composite...

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Abstract

The invention discloses a preparation method and an application of core-shell-structured nickelous hydroxide or hierarchical porous carbon composite material. The preparation method specifically takes porous carbon as a template, takes hexamethylene tetramine and nickel nitrate as precursors, and prepares the core-shell-structured nickelous hydroxide or the hierarchical porous carbon composite material by adopting a single-step hydrothermal reaction method. The prepared nickelous hydroxide or the hierarchical porous carbon is used for a supercapacitor. When the nickelous hydroxide or the hierarchical porous carbon is used as composite electrode material, the specific capacitance is up to 2952 F/g, and 81% of initial specific capacitance is still kept after 1000 times of circulating charge and discharge. The nickelous hydroxide or the hierarchical porous carbon composite material which is prepared by the method effectively achieves synergistic effect between electrode materials, is excellent in electrochemical performance, and obtains wide application in the field of supercapacitor materials.

Description

technical field [0001] The invention belongs to the field of new energy materials, relates to a preparation method of a supercapacitor electrode material, and in particular relates to the preparation of a core-shell structure nickel hydroxide / hierarchical porous carbon composite material. Background technique [0002] In recent years, the global economy has developed rapidly, but the resulting problems such as energy shortage and environmental pollution have become increasingly prominent. Finding new, efficient, environmentally friendly, renewable energy and energy storage and conversion equipment has become a common goal of researchers from all over the world. As a new type of energy storage element, supercapacitors have the advantages of short charging time, high charging efficiency, no pollution to the environment, long cycle life, no memory effect, and basically no maintenance. They are expected to be widely used in portable electronic equipment, electric vehicles, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01G53/04B01J13/02H01G9/042C01B32/05
CPCY02E60/13
Inventor 程起林李春忠马菁萍邬斌洁
Owner EAST CHINA UNIV OF SCI & TECH
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