A kind of precursor and the method and application of preparing carbon nanomaterial

A carbon nanomaterial and precursor technology, applied in the field of nanomaterials, can solve the problems of large volume expansion rate of iron oxide, complex preparation method, poor cycle performance, etc., and achieve the effects of high versatility, simplified synthesis process, and mild reaction conditions.

Active Publication Date: 2021-04-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method is relatively complicated, and the reaction temperature is high
[0008] Chinese patent CN201810995604.2 discloses a biomass carbon / iron oxide composite material for lithium battery negative electrode and its preparation method, which solves the problems of large volume expansion rate and poor cycle performance of lithium battery negative electrode material iron oxide

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  • A kind of precursor and the method and application of preparing carbon nanomaterial
  • A kind of precursor and the method and application of preparing carbon nanomaterial
  • A kind of precursor and the method and application of preparing carbon nanomaterial

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Embodiment 1

[0049] 1. Preparation of carbon nanomaterials

[0050]Dissolve 5.0g of ethylene glycol citrate, 2.0g of carboxymethylcellulose ammonium, and 5.0g of ferric nitrate nonahydrate in 100mL of water, stir evenly, and concentrate the liquid to 8mL at 120°C. Then the mixed gel-like liquid was placed in a 300 mL cylindrical ceramic crucible with a cover, and the crucible was placed in a constant temperature furnace at 300° C., and taken out after 5 minutes to obtain carbon nanomaterials.

[0051] After testing by the applicant, the SEM photos of the obtained carbon nanomaterials are as follows: figure 1 Shown, N 2 The adsorption-desorption curve and pore size distribution are as follows: figure 2 As shown, the Raman spectrum is shown as image 3 shown. It can be seen from the figure that the obtained carbon nanomaterial is a porous material composed of carbon nanofibers and carbon nanosheets, and its Brunauer–Emmett–Teller (BET) specific surface area is 202.5m 2 / g, which is at ...

Embodiment 2

[0057] 1. Preparation of carbon nanomaterials

[0058] Dissolve 5.0g of ethylene glycol citrate, 1.0g of carboxymethylcellulose ammonium, and 5.0g of manganese nitrate tetrahydrate in 50mL of water, stir evenly, and concentrate the liquid to 10mL at 120°C. Then the mixed gel-like liquid was placed in a 300 mL cylindrical ceramic crucible with a cover, and the crucible was placed in a constant temperature furnace at 350° C., and was taken out after 3 minutes to obtain a carbon nanomaterial.

[0059] After testing by the applicant, the SEM photos of the obtained carbon nanomaterials are as follows: Figure 4 Shown, N 2 The adsorption-desorption curve and pore size distribution are as follows: Figure 5 As shown, the Raman spectrum is shown as Image 6 shown. It can be seen from the figure that the obtained carbon nanomaterial is a porous material composed of carbon nanofibers and carbon nanosheets, and its BET specific surface area is 282.9m 2 / g, which is at 1360cm -1 and...

Embodiment 3

[0065] 1. Preparation of carbon nanomaterials

[0066] Dissolve 5.0g of ethylene glycol citrate, 1.0g of carboxymethylcellulose lithium, and 8.0g of nickel nitrate hexahydrate in 50mL of water, stir well, and concentrate the liquid to 10mL at 120°C. Then the mixture was placed in a 300mL cylindrical ceramic crucible with a cover, and the crucible was placed in a constant temperature furnace at 400°C, and it was taken out after 2 minutes.

[0067] After testing by the applicant, the SEM photos of the obtained carbon nanomaterials are as follows: Figure 7 Shown, N 2 The adsorption-desorption curve and pore size distribution are as follows: Figure 8 As shown, the Raman spectrum is shown as Figure 9 shown. It can be seen from the figure that the obtained carbon nanomaterial is a porous material composed of carbon nanofibers and carbon nanosheets, and its BET specific surface area is 350.6m 2 / g, which is at 1360cm -1 and 1589cm -1 Two distinct Raman peaks are shown, belo...

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Abstract

A precursor comprises the following components in parts by weight: 5 parts of ethylene glycol citrate; 1-2 parts of water-soluble cellulose; and 1-10 parts of metal nitrate. The method for preparing carbon nanomaterials is as follows: 1) taking materials in proportion, dissolving them in water and mixing them evenly, and concentrating to obtain a mixed solution; 2) putting the mixed solution obtained in step 1) into a reaction vessel, and heating the mixture under the condition of 250-400° C. The reaction was carried out for 1-10min to obtain carbon nanomaterials. The obtained carbon nanometer material can be used as an energy storage active material of an electrode sheet, and can be used to prepare a high-performance capacitor or a lithium ion battery.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a precursor and a method and application for preparing carbon nanomaterials. Background technique [0002] Due to their excellent chemical stability, remarkable electrical conductivity, and unique micro / nanostructure, carbon nanomaterials are considered as potential alternative materials in the fields of polymer industry, environmental treatment, heterogeneous catalysis, and advanced electronic devices. When carbon nanomaterials have a porous structure, high specific surface area, hybrid structure, and proper heteroatom doping, their energy storage performance becomes particularly prominent and competitive. [0003] Currently, different methods, such as hydrothermal carbonization (HTC), template-assisted carbonization, electrochemical deposition, and powder carbonization, have been developed to synthesize different types of nanocarbon materials from various organic precursors. Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15H01M4/587H01M10/0525
CPCY02E60/10
Inventor 邵自强李磊陈垦王飞俊王文俊王建全刘建新
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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