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Bio-based carbon microsphere material, preparation method and applications thereof

A bio-based carbon and microsphere technology, applied in the preparation/purification of carbon, electrochemical generators, electrical components, etc., can solve the problems of limited fuel cells, high cost, low theoretical capacity, etc., and achieve a simple preparation process and reduce The effect of environmental pollution and wide source of raw materials

Inactive Publication Date: 2019-01-22
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high cost and limited resources of noble metal oxygen reduction reaction catalysts (ORR) limit the application of fuel cells; on the other hand, commercial LIBs mainly use graphite as the anode, due to its working potential of about 0 V (relative to Li / Li+), with low theoretical capacity, and unwanted lithium dendrites would appear on the graphite surface

Method used

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  • Bio-based carbon microsphere material, preparation method and applications thereof
  • Bio-based carbon microsphere material, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation of bio-based carbon microspheres: Weigh 1.9 g chitosan, 0.1 g gallic acid and 30 mL distilled water into a 50 mL reactor with a polytetrafluoroethylene liner, react at 170 °C for 12 h, and react After cooling to room temperature, the obtained black product was centrifuged, and the collected black solid was repeatedly washed with ethanol and deionized water, and then dried in a vacuum oven at 90°C to obtain catalytically active nitrogen doped carbon microspheres.

[0015] Test the application of N-doped carbon microspheres as a catalyst in ORR: the prepared nitrogen-doped carbon microspheres were uniformly dispersed in a mixed solution of deionized water and Nafion (Dupont, 5 wt.%) alcohol solution, and the The above suspension was coated on the surface of the glassy carbon electrode to prepare a working electrode. At the same time, for comparison, the commercial Pt / C (20% Pt, JM) catalyst prepared by the same method was tested under the same conditions.

...

Embodiment 2

[0019] Preparation of bio-based carbon microspheres: Weigh 1.8 g chitosan, 0.2 g gallic acid and 30 mL distilled water into a 50 mL reactor with a polytetrafluoroethylene liner, react at 180 °C for 24 h, and react After cooling to room temperature, the obtained black product was centrifuged, and the collected black solid was repeatedly washed with ethanol and deionized water, and then dried in a vacuum oven at 90°C to obtain catalytically active nitrogen doped carbon microspheres.

[0020] Test the application of N-doped carbon microspheres as a catalyst in ORR: the prepared nitrogen-doped carbon microspheres were uniformly dispersed in a mixed solution of deionized water and Nafion (Dupont, 5 wt.%) alcohol solution, and the The above suspension was coated on the surface of the glassy carbon electrode to prepare a working electrode. At the same time, for comparison, the commercial Pt / C (20% Pt, JM) catalyst prepared by the same method was tested under the same conditions.

...

Embodiment 3

[0024] Preparation of bio-based carbon microspheres: Weigh 1.6 g chitosan, 0.4 g gallic acid and 30 mL distilled water into a 50 mL reactor with polytetrafluoroethylene liner, react at 180 °C for 24 h, and react After cooling to room temperature, the obtained black product was centrifuged, and the collected black solid was repeatedly washed with ethanol and deionized water, and then dried in a vacuum oven at 90°C to obtain catalytically active nitrogen doped carbon microspheres.

[0025] Test the application of N-doped carbon microspheres as a catalyst in ORR: the prepared nitrogen-doped carbon microspheres were uniformly dispersed in a mixed solution of deionized water and Nafion (Dupont, 5 wt.%) alcohol solution, and the The above suspension was coated on the surface of the glassy carbon electrode to prepare a working electrode. At the same time, for comparison, the commercial Pt / C (20% Pt, JM) catalyst prepared by the same method was tested under the same conditions.

[0...

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Abstract

The invention relates to a bio-based carbon microsphere material, a preparation method and applications thereof, wherein the catalyst adopts biomass chitosan and gallic acid as raw materials. The preparation method comprises: 1) weighing chitosan and gallic acid according to a certain ratio, adding into a reaction kettle having a polytetrafluoroethylene liner, carrying out a reaction for 24-48 h at a temperature of 160-220 DEG C, cooling to a room temperature after completing the reaction, separating and drying the obtained black product to obtain a biomass non-metal catalyst material, washing, and drying to obtain the nitrogen-doped carbon material capable of catalyzing ORR, wherein the material has characteristics of high nitrogen content, rich active sites, suitable surface area and suitable pore volume, can be used as the catalyst in the oxygen reduction catalytic reaction of fuel cells, and can enhance the storage ability of lithium battery electrodes. According to the present invention, the preparation method is simple, the raw materials are the biomass with rich source, the cost is low, the method is environmentally friendly, and the obtained catalyst has excellent performance, and is the promising fuel cell catalyst and the lithium ion battery electrode material.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials and batteries, in particular to a bio-based carbon microsphere material with excellent catalytic performance for ORR prepared by one-step reaction, a preparation method and application thereof. Background technique [0002] In view of the energy shortage and environmental pollution caused by traditional fossil fuels, the development of sustainable clean energy technologies is of great significance to promote economical, efficient and sustainable development. Fuel cells (FCs) and lithium-ion batteries (LIBs) bring great promise for future green energy conversion and storage devices, which are conducive to solving the above problems and achieving sustainable development. However, the high cost and limited resources of noble metal oxygen reduction reaction catalysts (ORR) limit the application of fuel cells; on the other hand, commercial LIBs mainly use graphite as the anode, due to it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01M4/90H01M4/587H01M10/0525
CPCC01B32/05H01M4/587H01M4/90H01M10/0525Y02E60/10Y02E60/50
Inventor 许利娜夏建陵杨小华丁海阳李守海李梅张燕
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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