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Precursor, method for preparing carbon nanomaterials and application

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

Active Publication Date: 2019-05-28
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 electrodes 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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  • Precursor, method for preparing carbon nanomaterials and application
  • Precursor, method for preparing carbon nanomaterials and application
  • Precursor, method for preparing carbon nanomaterials and application

Examples

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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 well, 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 13...

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 Figure 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 an...

Embodiment 3

[0065] 1. Preparation of carbon nanomaterials

[0066] Take 5.0g of ethylene glycol citrate, 1.0g of carboxymethylcellulose lithium, and 8.0g of nickel nitrate hexahydrate and dissolve them in 50mL of water, stir evenly, 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...

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Abstract

Provided is a precursor. The precursor is prepared from the components in parts by weight: 5 parts of glycol citrate, 1-2 parts of water-soluble cellulose, and 1-10 parts of metal nitrate. A method for preparing carbon nanomaterials includes the steps that (1) the materials are taken according to the proportions, dissolved in water and mixed evenly, and a mixed solution is obtained after concentration; and (2) the mixed solution obtained in the step (1) is placed in a reaction container, and the carbon nanomaterials are obtained after reaction for 1-10 min at 250-400 DEG C. The obtained carbonnanomaterials used as energy-storage active materials of electrode plates can be applied to preparation of high-performance capacitors or lithium ion batteries.

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 Applications(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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