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Preparation method and application of three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution

A technology of three-dimensional porous and carbon materials, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., to achieve the effect of alleviating impact, improving mass transfer efficiency, and simple process

Inactive Publication Date: 2020-10-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the synergistic effect of multiple parameters of carbon materials and their design. In particular, it is still difficult to prepare three-dimensional porous carbon materials with high specific surface area and adjustable pore size distribution through simple and low-cost methods.

Method used

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  • Preparation method and application of three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution
  • Preparation method and application of three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution
  • Preparation method and application of three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution

Examples

Experimental program
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Effect test

Embodiment 1

[0057] In a 100 mL beaker, 44 mL of deionized water was added, 16 g of sodium chloride was added to form a saturated solution, 4 g of sucrose, 4 g of dicyandiamide, and 4 g of 200nm calcium carbonate were added in sequence, magnetically stirred at room temperature for 4 hours, and ultrasonicated at 100 Hz for 1 hour.

[0058] After freezing the above mixed liquid with liquid nitrogen, it was quickly transferred to a freeze dryer for freeze drying and kept for 48 hours.

[0059] Weigh 4g of the freeze-dried sample and place it in a large porcelain boat, then sinter it in an argon atmosphere. The first stage calcination temperature is 550℃, the time is 1h, the heating rate is 5℃ / min, and the second stage calcination temperature is 900℃, time 2h, heating rate of 5℃ / min, to obtain three-dimensional porous carbon material.

[0060] Add 250mL of 10% dilute hydrochloric acid solution in a 500mL beaker, then add 4g of carbon material, ultrasonically disperse at room temperature for 1h, magne...

Embodiment 2

[0065] In a 100mL beaker, 44mL of deionized water was added, 16g of sodium chloride was added to form a saturated solution, 4g of sucrose, 4g of dicyandiamine, 4g of 500nm calcium carbonate were sequentially added, magnetically stirred at room temperature for 4h, and ultrasonic for 1h at 100Hz.

[0066] After freezing the above mixture with liquid nitrogen, it was quickly transferred to a freeze dryer for freeze drying and kept for 36 hours.

[0067] Weigh 4g of the freeze-dried sample, place it in a large porcelain boat, and calcine it in an argon atmosphere. The first stage calcination temperature is 550℃, the time is 1h, the heating rate is 5℃ / min, and the second stage calcination temperature is 800℃, time 2h, heating rate of 5℃ / min, to obtain three-dimensional porous carbon material.

[0068] Add 250mL of 10% dilute hydrochloric acid solution in a 500mL beaker, then add 4g of carbon material, ultrasonically disperse for 1h at room temperature, magnetically stir for 4h, then perfo...

Embodiment 3

[0072] Example 3: No NaCl added

[0073] In a 100 mL beaker, 44 mL of deionized water was added, 4 g of sucrose, 4 g of dicyandiamide, and 4 g of 200 nm calcium carbonate were added in sequence, magnetically stirred at room temperature for 4 hours, and ultrasonicated at 100 Hz for 1 hour.

[0074] After freezing the above mixed liquid with liquid nitrogen, it was quickly transferred to a freeze dryer for freeze drying and kept for 48 hours.

[0075] Weigh 4g of the freeze-dried sample and place it in a large porcelain boat, then sinter it in an argon atmosphere. The first stage calcination temperature is 550℃, the time is 1h, the heating rate is 5℃ / min, and the second stage calcination temperature is 900℃, time 2h, heating rate of 5℃ / min, to obtain three-dimensional porous carbon material.

[0076] Add 250mL of 10% dilute hydrochloric acid solution in a 500mL beaker, then add 4g of carbon material, ultrasonically disperse at room temperature for 1h, magnetically stir for 4h, then perf...

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Abstract

The invention discloses a preparation method and application of a three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution. The preparation methodof the three-dimensional porous carbon material comprises the following steps: (1) preparing a saturated aqueous solution of sodium chloride, then adding saccharides, nitrogen-containing organic matters and nano-calcium carbonate, and fully and uniformly dispersing to obtain a dispersion; (2) carrying out freeze drying on the obtained dispersion; (3) putting the freeze-dried sample into a tubularfurnace, and carrying out two-stage carbonization in a protective atmosphere to obtain a template-containing carbon material 1; (4) removing a template in the carbon material 1 to obtain a carbon material 2; (5) mixing and grinding the carbon material 2 and an activating agent, and roasting the carbon material 2 in a tubular furnace under a protective atmosphere to obtain a carbon material 3; and(6) removing the activating agent in the carbon material 3 to obtain the three-dimensional porous carbon material with high specific surface area. The invention provides application of the prepared three-dimensional porous carbon material as a negative electrode material of a lead-carbon battery, and the three-dimensional porous carbon material shows excellent capacitance performance and cyclingstability.

Description

Technical field [0001] The invention belongs to the field of new energy materials, and specifically relates to a preparation method and application of a three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution. Background technique [0002] With the rapid development of society, traditional petrochemical energy and resources are gradually depleted, and the ecological environment has further deteriorated. Vigorously developing new energy technologies and looking for clean energy has become the key to solving energy problems. At present, renewable energy sources such as wind energy and solar energy have gradually become mainstream new energy production methods in society. Among the batteries used in energy storage systems such as electric vehicles, wind energy and solar energy, lead-carbon batteries occupy an important position in the secondary battery industry due to their high safety, low price, and reliable performance. [000...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/348
CPCC01B32/318C01B32/348
Inventor 王连邦张聂庆冯冲吴昊苏利伟
Owner ZHEJIANG UNIV OF TECH
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