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A kind of preparation method of porous carbon material

A porous carbon and carbonization technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem that it cannot be used to prepare ashless electrode carbon, and achieve low ash content, easy activation, and high activation yield. Effect

Active Publication Date: 2016-08-24
DALIAN UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ordinary polymers usually contain inorganic additives such as flame retardants, plasticizers and other inorganic fillers, so they cannot be used to prepare ashless electrode carbons. The preparation of ashless activated carbons currently reported uses phenolic resins as raw materials [CN201210010402 .0】

Method used

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  • A kind of preparation method of porous carbon material
  • A kind of preparation method of porous carbon material
  • A kind of preparation method of porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The polyimide film leftovers were sheared and pulverized to less than 50mm×50mm, placed in a carbonization activation device, and dried and infused at 200°C for 6 hours. The treated material is heated to a carbonization temperature of 600°C at a nitrogen flow rate of 200ml / min for a treatment time of 2 hours; and heated to an activation temperature of 800°C at a nitrogen flow rate of 200ml / min. The activation gas water vapor flow rate is 300ml / min. The activation time is 5h. Cool to room temperature under a nitrogen flow rate of 50ml / min. The obtained solid ball milled to below 1 mm; the main properties of the porous electrode carbon are shown in Table 1.

Embodiment 2～11

[0027] According to the steps of Example 1, but the high-temperature-resistant polymer film is of the type given in Table 1, the properties of the obtained porous electrode carbon are shown in Table 1.

[0028] Table 1 Properties of porous carbon

[0029]

[0030]

Embodiment 12

[0032] The polybenzimidazolium imide film scraps were sheared and crushed to less than 100mm×100mm, placed in a carbonization activation device, and dried and infused at 300°C for 4 hours. The processed material is heated to a carbonization temperature of 700°C at a nitrogen flow rate of 100ml / min for 1 hour; and heated to an activation temperature of 900°C at a nitrogen flow rate of 100ml / min. The activation gas is a mixed gas composed of water vapor and carbon dioxide at a volume ratio of 1:1, and the gas flow rate is 100ml / min. The activation time is 1h. Cool to room temperature under a nitrogen flow rate of 50ml / min. The obtained solid ball milled to 0.2-2mm; the main properties of the porous electrode carbon are shown in Table 2.

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Abstract

The invention relates to a preparation method of a porous carbon material, and in particular relates to a method for preparing a porous carbon electrode material by using high-temperature-resistant polymer thin film leftovers which are difficult to recycle and regenerate. According to the preparation method of the porous carbon material, the polymer thin film leftovers are used as raw materials; a polymer is polysulfone, polybenzimidazole, polyimide, polybenzoxazole, polybenzimidazole imide and polyether ketone. The process of the preparation method is simple and convenient; the activation yield is high, and the specific area of a product is large; the ash content is low, and the electrochemical activity is high; the porous carbon material is a potential electrode material for a lithium battery, a super capacitor, a dye-sensitized solar cell and a super lead-acid battery.

Description

technical field [0001] The invention relates to a method for preparing a porous carbon material, in particular to a method for preparing a porous carbon electrode material by utilizing scraps of high-temperature-resistant polymer films that are difficult to recycle and regenerate. Background technique [0002] High temperature resistant polymer films include: polysulfone (bisphenol polysulfone, polyarylether sulfone, phenolphthalein polysulfone), polybenzimidazole, polyimide, polybenzoxazole, polybenzimidazole imide , polyether ketone (phenolphthalein polyether ketone, polyether ether ketone), etc., have excellent mechanical properties, electrical properties, chemical stability and high radiation resistance, high temperature resistance and low temperature resistance (-269 ° C to + 400°C), which is attracting increasing attention from academia and industry. Such as: aromatic polyimide film, American DuPont successfully trial-produced polyimide film (PI film) in 1962, and beg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 王同华王春雷李琳曾乐刘波赵林
Owner DALIAN UNIV OF TECH
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