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A kind of carbon thin film, activated carbon thin film and its preparation method and supercapacitor

A technology of supercapacitor and carbon film, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc. It can solve the poor mechanical flexibility of porous bulk materials, the limitation of capacitor flexibility, Low energy storage density and other issues, to achieve good mechanical flexibility, increase energy density, and high specific surface area

Active Publication Date: 2018-09-04
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN105788885A), coffee beans (Y.S.Yun et al, Hierarchicallyporous carbon nanosheets from waste coffee grounds for supercapacitors.ACSAppl.Mater.Interfaces 2015,7,3684-3690), etc. are used as precursor carbonization to prepare electrode materials, but these materials are powder structures , when preparing capacitors, it is necessary to add auxiliary reagents such as binders to prepare carbon thin film electrodes, the process is complicated and the energy density is low
Although carbonized cellulose (X.J.Wang et al, All-biomaterial supercapacitor derived from bacterial cellulose. Nanoscale, 2016, 8, 9146-9150), watermelon pulp (X.L.Wu et al, Biomass-derived sponge-like carbonaceous hydrogels and aerogels for supercapacitors. ACS Nano ,2013,7,3589-3597), cotton (L.Li et al, Nitrogen-dopedcarbonized cotton for highly flexible supercapacitors.Carbon,2016,105,260-267), etc. can obtain self-supporting bulk structures, but these porous bulk materials The mechanical flexibility is poor, and the flexibility of the capacitor is limited
Moreover, due to the existence of a large number of macroporous structures, the energy storage density of such materials is low, generally less than 10Wh / kg

Method used

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  • A kind of carbon thin film, activated carbon thin film and its preparation method and supercapacitor
  • A kind of carbon thin film, activated carbon thin film and its preparation method and supercapacitor
  • A kind of carbon thin film, activated carbon thin film and its preparation method and supercapacitor

Examples

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Effect test

Embodiment 1

[0053] A method for preparing and activating a carbon thin film, comprising the steps of:

[0054] (1) Sandwich fresh petals between two graphite plates and heat and dry them at 110°C on a heating table;

[0055] (2) Place the dried petals in a tube furnace and heat at 800° C. for 4 hours under the protection of nitrogen, with a nitrogen flow rate of 50 sccm, to obtain a carbonized product;

[0056] (3) Soak the carbonized product in 1M nitric acid at 25°C for 96 hours to remove inorganic particles to obtain a carbon film;

[0057] (4) Place the carbon film in a tube furnace and heat it in air at 280° C. for 4 hours to obtain an activated carbon film.

[0058] The activated carbon film that step (4) obtains is a self-supporting structure, and its size is 60-80mm 2 , observed by a scanning electron microscope (model Hitachi S4800FESEM), the prepared activated carbon film thickness is 2-50 μm, the surface contains a large number of wrinkled structures, and the ridge height of ...

Embodiment 2

[0060] A method for preparing and activating a carbon thin film, comprising the steps of:

[0061] (1) Sandwich fresh petals between two graphite plates and heat and dry them at 110°C on a heating table;

[0062] (2) Place the dried petals in a tube furnace and heat them at 1000° C. for 1 h under the protection of argon, with an argon flow rate of 100 sccm, to obtain a carbonized product;

[0063] (3) Soak the carbonized product in 4M hydrochloric acid at 25°C for 48 hours to remove the inorganic particles on the surface of the carbon film;

[0064] (4) Place the carbon film in a tube furnace and heat it in air at 300° C. for 1 h to obtain an activated carbon film.

[0065] The activated carbon film obtained in step (4) is a self-supporting structure, such as Figure 1-a As shown, its size is 50-70mm 2 , observed by a scanning electron microscope (model Hitachi S4800FESEM), the prepared activated carbon film thickness is 2-50 μ m, the surface contains a large number of wrink...

Embodiment 3

[0067] A method for preparing and activating a carbon thin film, comprising the steps of:

[0068] (1) Sandwich fresh petals between two graphite plates and heat and dry them at 110°C on a heating table;

[0069] (2) Place the dried petals in a tube furnace and heat them at 1200° C. for 30 minutes under the protection of argon, and the argon flow rate is 2000 sccm to obtain a carbonized product;

[0070] (3) Soak the carbonized product in 6M sulfuric acid at 25°C for 24 hours to remove the inorganic particles on the surface of the carbon film to obtain a carbon film;

[0071] (4) Place the carbon film in a tube furnace and heat it in air at 400° C. for 2 hours to obtain an activated carbon film.

[0072] The activated carbon film that step (4) obtains is self-supporting structure, and its size is 40-60mm 2 , observed by scanning electron microscope (model Hitachi S4800FESEM), the thickness of the prepared activated carbon film is 2-50 μm, the surface contains a large number ...

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Abstract

The invention provides a carbon thin film, a preparation method thereof, an activated carbon thin film and a supercapacitor. The carbon thin film is characterized in that the carbon thin film is a flexible self-supporting carbon thin film; the surface of the carbon thin film contains folded structures with ridge heights of 10-50nm. The carbon thin film provided by the invention has good mechanical flexibility, takes thin film biomass which has extensive sources, can be regenerated and contains folded micro-structures on the surface as a precursor, is prepared by adopting a simple heating method, is environment-friendly, is low in cost, contains plenty of folded structures on the surface, has high specific surface area after being activated, can be used for preparing the supercapacitor, has high storage capacity and has the effects of avoiding introduction of extra additives, simplifying the preparation process, improving the energy storage density of the capacitor and reducing the cost of the capacitor.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and its application, and relates to a carbon film, an activated carbon film and its preparation method and application, in particular to a self-supporting carbon film with a wrinkled surface, an activated carbon film and its preparation method and supercapacitors prepared therefrom. Background technique [0002] With the increasingly serious energy crisis and environmental problems, the demand for renewable clean energy is becoming increasingly urgent. The development of new energy structures such as solar energy and wind energy can greatly reduce human dependence on non-renewable resources such as coal and oil, and reduce environmental pollution caused by the burning of such resources. However, these energy structures are time and geographically limited, therefore, the storage of this type of energy is the most critical issue restricting the development of this type of energy st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 李红变上媛媛余秀李莉方英
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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