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Hetero atom-doped three dimensional porous carbon material, preparation method and application thereof

A three-dimensional porous and heteroatom technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of immature production technology of three-dimensional porous carbon materials, and achieve a simple and rapid preparation method, controllable conditions, and increased contact area. Effect

Active Publication Date: 2016-11-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing production technology of three-dimensional porous carbon materials is still immature

Method used

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  • Hetero atom-doped three dimensional porous carbon material, preparation method and application thereof
  • Hetero atom-doped three dimensional porous carbon material, preparation method and application thereof
  • Hetero atom-doped three dimensional porous carbon material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix 0.2g of carbon quantum dots with 1.0g of sodium hydroxide and 0.8g of sodium phosphate evenly, and then calcinate them at 900°C for 2h under the protection of an inert gas, with a heating rate of 10°C / min, and cool down naturally. Grind the calcined product into powder, add an appropriate amount of concentrated hydrochloric acid, adjust its pH to neutral, separate it by vacuum filtration, wash it with deionized water for 5 times, and dry it in vacuum at 100°C for 12 hours. The black powder obtained is phosphorus Doped three-dimensional porous carbon materials. figure 1 In the scanning electron micrograph of the phosphorus-doped three-dimensional porous carbon material, a porous three-dimensional structure can be observed. figure 2 Optical photograph of the prepared phosphorus-doped three-dimensional porous carbon material powder, which appears as a fluffy black powder.

[0038] Mix the obtained carbon material, sodium carboxymethyl cellulose, and conductive carbon...

Embodiment 2

[0040] 0.2g of carbon quantum dots and 3.0g of sodium hydroxide and 1.6g of B 2 o 3 Mix evenly, and then calcinate at 1000°C for 2h under the protection of inert gas, the heating rate is 10°C / min, and the temperature is naturally lowered. Grind the calcined product into powder, add an appropriate amount of concentrated hydrochloric acid, adjust its pH to neutral, vacuum filter and separate, wash with deionized water for 5 times, and vacuum dry at 100°C for 12 hours. The obtained black powder is boron Doped three-dimensional porous carbon materials. Figure 4 It is a scanning electron micrograph of the boron-doped three-dimensional porous carbon material; it is a three-dimensional porous material. Electrochemical test results show that at 2A g -1 Under the current density, the capacity retention rate is as high as 97% after 1000 cycles.

Embodiment 3

[0042] Mix 0.2g of carbon quantum dots with 1.0g of sodium hydroxide and 1.2g of melamine evenly, and then calcinate them at 1000°C for 2h under the protection of an inert gas, with a heating rate of 15°C / min, and cool down naturally. Grind the calcined product into powder, add an appropriate amount of concentrated hydrochloric acid, adjust its pH to neutral, separate it by vacuum filtration, wash it with deionized water for 5 times, and dry it in vacuum at 100°C for 12 hours. The black powder obtained is nitrogen Doped three-dimensional porous carbon materials. Figure 5 It is a scanning electron micrograph of the nitrogen-doped three-dimensional porous carbon material, which is a porous three-dimensional structure. Such as Image 6 As shown, the electrochemical test results show that at 2A g -1 Under the current density, its reversible specific capacity still maintains 117.7mAh g after 1000 charge-discharge cycles. -1 , The capacity retention rate after 1000 cycles is as ...

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Abstract

The invention discloses a hetero atom-doped three dimensional porous carbon material preparation method. According to the invention, carbon quantum dot, an alkali metal hydroxide and a hetero atom source are mixed, a mixture is put under inert gas atmosphere for being calcined, and the calcined product is subjected to neutralization, solid-liquid separation, and drying in order to obtain the hetero atom-doped three dimensional porous carbon material. The hetero atom source is selected from at least one of a boron compound, a sulfur compound, a nitrogen compound, and a phosphor compound. In addition, the invention also provides the three-dimensional porous carbon material, and an application of the three dimensional porous carbon material as an electrode material in preparation of an energy storage device. The preparation method has the advantages of easy and rapid operation, high efficiency and high yield, controllable condition, and low cost, and is in favor of industrial production; and the produced three-dimensional porous carbon material as the electrode material of the energy storage device, and has the excellent performances of high capacity, high power and long service life.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a heteroatom-doped three-dimensional porous carbon material, a preparation method and its application as an electrode material in the preparation of an energy storage device. Background technique [0002] Carbon materials are rich in sources, low in cost, non-toxic and stable, and are widely used in many fields. Carbon materials are considered to be one of the most promising electrode materials for electrochemical energy storage devices (lithium-ion batteries, sodium-ion batteries, and supercapacitors). The development of electrochemical energy storage devices is of great significance. [0003] Carbon materials with three-dimensional porous characteristics have large specific surface area, high electrical conductivity, and good chemical stability, and are especially suitable for use in energy storage and conversion systems, such as lithium-ion bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01M4/62
CPCC01P2004/03C01P2006/40H01M4/625Y02E60/10
Inventor 纪效波侯红帅张艳邹国强黄兆东
Owner CENT SOUTH UNIV
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