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Graphene-protein derived carbon supercapcaitor material and preparation method thereof

A supercapacitor and protein technology, which is used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of complex composite effects and unsatisfactory composite methods, and achieve good rate performance and cycle stability. Atomic doping, the effect of considerable yield

Inactive Publication Date: 2014-11-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these composite methods are often complicated or the composite effect is not ideal.

Method used

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  • Graphene-protein derived carbon supercapcaitor material and preparation method thereof
  • Graphene-protein derived carbon supercapcaitor material and preparation method thereof
  • Graphene-protein derived carbon supercapcaitor material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Prepare an aqueous solution of mulberry silk protein with a mass fraction of 4%. Prepare graphene oxide with a mass fraction of 0.4% and a size of 200 nm.

[0027] 2. Under stirring at room temperature, the above two solutions were mixed under the condition of pH=8, and the two were mixed at a volume ratio of 1:1 to obtain a mixed solution of silkworm silk protein and graphene oxide.

[0028] 3. Add sodium citrate for reduction, the reduction temperature is 100°C, and react for 3 hours. After the reaction, a silkworm silk protein-reduced graphene oxide solution is obtained. Figure 1 An atomic force microscope image of this composite solution, showing silkworm silk protein wrapping around reduced graphene oxide to prevent its large sheets from aggregating.

[0029] 4. Add NaOH to the composite solution obtained above, and the solid content ratio of the composite solution is 1:1, stir for 0.5h, and vacuum dry at room temperature.

[0030] 5. Carbonize the above drie...

Embodiment 2

[0036] 1. Prepare an aqueous solution of mulberry silk protein with a mass fraction of 10%. Prepare graphene oxide with a mass fraction of 1% and a size of 200 nm.

[0037]2. Under stirring at room temperature, the above two solutions were mixed under the condition of pH=8, and the two were mixed at a volume ratio of 1:2 to obtain a mixed solution of silkworm silk protein and graphene oxide.

[0038] 3. Add hydrazine hydrate for reduction, the reduction temperature is 80°C, and react for 6 hours. After the reaction is completed, a silkworm silk protein-reduced graphene oxide solution is obtained.

[0039] 4. Add KOH to the composite solution obtained above, and the solid mass ratio of the composite solution to the composite solution is 2:1, stir for 0.5h, and freeze-dry.

[0040] 5. Carbonize the above dried composite. Under a nitrogen atmosphere, the temperature is 700° C., and the heating rate is 10° C. / min. Carbonization time is 3h. After carbonization, wash with water ...

Embodiment 3

[0045] 1. Prepare an aqueous solution of mulberry silk protein with a mass fraction of 6%. Graphene oxide was prepared with a mass fraction of 0.6% and a size of 200 nm.

[0046] 2. Under stirring at room temperature, the above two solutions were mixed under the condition of pH=8, and the two were mixed at a volume ratio of 1:10 to obtain a mixed solution of mulberry silk protein and graphene oxide.

[0047] 3. Add NaOH to the compound solution obtained above, and the solid content ratio of the compound solution to the compound solution is 5:1. The reduction reaction was carried out at a temperature of 80° C. for 24 hours. After the reaction, a silkworm silk protein-reduced graphene oxide solution was obtained.

[0048] 4. Carbonize the above dried composite. Under a nitrogen atmosphere, the temperature is 700° C., and the heating rate is 10° C. / min. Carbonization time is 3h. After carbonization, wash with water and ethanol repeatedly. Under the condition of 30° C. in a v...

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Abstract

The invention belongs to the technical field of preparation of a supercapaicotr material, and specifically discloses a graphene-protein derived carbon supercapcaitor material and a preparation method thereof. A solution for a protein to coat grapheme is prepared through interaction between the water-soluble protein and the grapheme; and a pore forming agent is added, drying is performed after uniform mixing, and high-temperature carbonization is carried out, such that the porous graphene-water-soluble-protein derived carbon composite material is prepared. The preparation method is simple, green and mild, energy is reduced, the efficiency is high, the cost is low, and the yield is high. The prepared graphene-protein derived carbon composite material is tight and uniform, is large in specific surface area, is of a multi-tunnel structure, and is good in conductivity. A supercapacitor prepared by use of the material has quite good power multiplying performance and circulating stability, and can also demonstrate an ultrahigh specific capacity in the condition of a large current density, thereby having wide application prospect in such fields as new energy eclectic vehicles, hybrid power vehicles, wind power generation, solar energy generation and the like.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a graphene-protein derived carbon supercapacitor material and a preparation method thereof. Background technique [0002] The development of supercapacitors began in the 1960s, and in the 1990s due to the rise of hybrid electric vehicles, it received widespread attention and began to develop rapidly. Supercapacitor is a new energy storage device between traditional capacitors and rechargeable batteries. Favored by researchers at home and abroad, it has broad application prospects in many fields such as electric vehicle uninterruptible power supply, aerospace, military and many other fields. [0003] According to the storage and conversion mechanism of electric energy, supercapacitors are divided into electric double layer capacitors (electric double layer capacitors, EDLC) and Faraday quasi-capacitors (also known as pseudo-capacitors, pseudo-capacitors),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/38H01G11/86
CPCY02E60/13
Inventor 邵正中王雅娴
Owner FUDAN UNIV
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