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Polypeptide electrode, supercapacitor prepared therefrom and preparation method thereof

An electrode and polypeptide technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor stability and cycle performance of electric double layer capacitors, achieve good application prospects, improve rate performance, good The effect of foldable performance

Active Publication Date: 2018-05-29
深圳探影生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One object of the present invention is to provide a polypeptide electrode to solve the problem of poor stability and cycle performance of the electric double layer capacitor assembled from it due to the solubility of polypeptide fibers

Method used

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  • Polypeptide electrode, supercapacitor prepared therefrom and preparation method thereof
  • Polypeptide electrode, supercapacitor prepared therefrom and preparation method thereof
  • Polypeptide electrode, supercapacitor prepared therefrom and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041]Example 1: Preparation and Characterization of Polypeptide Nanofibers

[0042] Polypeptides are synthesized by solid-phase peptide synthesis as electrode materials for polypeptide supercapacitors. The polypeptides are dipeptides, and their molecular structural formula is:

[0043]

[0044] The synthesis steps include: linking the natural amino acid phenylalanine (F) to the resin by a polypeptide solid-phase synthesis method, and then linking the carboxyl end of the natural amino acid glutamic acid (E) at the amino terminal of F, so that F and E are connected, The amino terminal of E is protected by Fmoc connection, and then the dipeptide molecule is cut off from the resin, separated and purified by high-performance liquid chromatography, and freeze-dried to obtain the above-mentioned dipeptide. The flow of this process is as follows:

[0045]

[0046] In the above synthesis process, the equivalents used for raw materials are: the degree of substitution of resin: 0...

Embodiment 2

[0051] Example 2: Preparation of Polypeptide Electrode

[0052] (1) Preparation of conductive substrate: select a polyethylene terephthalate (PET) film 1 with a thickness of 0.1 mm as the substrate, and sputter a layer of gold atoms on the PET film 1 with a magnetron sputtering apparatus to form a Layer thickness is about the gold film 2 of 5nm, makes the conductive base of electrode thus (referring to Figure 4 ). A multimeter was used to detect the conductivity of the prepared conductive substrate.

[0053] (2) Formation of polypeptide nanofiber layer 3: the gel-like polypeptide dispersion prepared in Example 1 is evenly coated on the conductive substrate, placed in a ventilated place to dry, and after the moisture is volatilized, it is transferred to Water removal treatment was carried out in a vacuum oven at 60°C. In the above process, the polypeptide grows in the form of self-assembly on the surface of the conductive substrate, and a network-like polypeptide nanofiber ...

Embodiment 3

[0055] Embodiment 3: the preparation of polypeptide supercapacitor

[0056] (1) Preparation of electrolyte: Add 10 g of deionized water and 1 g of concentrated sulfuric acid (H 2 SO 4 , analytically pure, mass fraction 98%), stir evenly; add 1g of polyvinyl alcohol crystals (PVA, analytically pure) to the above solution, stir evenly; place the beaker containing the mixed solution obtained above in a stirring water bath at 90°C In the pot, stir at a speed of 200r / min, and keep warm for 30min to get transparent and uniform PVA+H 2 SO 4 The electrolyte solution was kept warm in a water bath at 90°C until use.

[0057] (2) The polypeptide electrode was prepared by the method described in Example 2.

[0058] (3) The assembly of supercapacitor: the PVA+H that step (1) makes 2 SO 4 The electrolytic solution and the polypeptide electrode prepared in step (2) are assembled and compacted in an electric double layer capacitor, and finally a formed supercapacitor is formed. The thi...

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Abstract

The invention discloses a polypeptide electrode, a supercapacitor prepared therefrom and a preparation method thereof. The polypeptide electrode comprises a conductive substrate, a polypeptide layer which is in a porous mesh fiber structure and is formed on the conductive substrate in a polypeptide self-assembling manner, and a titanium dioxide layer which is deposited on the surface of the polypeptide layer through atomic layer deposition. The polypeptide electrode provided by the invention consists of the polypeptide layer in the nanofiber structure and the titanium dioxide layer. The polypeptide electrode retains the advantages of good conductivity and mechanical property, reproducibility, and being pollution-free and non-toxic of polypeptide fiber, and effectively inhibits the defect that polypeptide fiber is dissolved in charge and discharge processes. The specific capacity, the stability and the cyclicity are further improved. The polypeptide electrode can be used to prepare a double-layer supercapacitor which has the advantages of flexibility, stability and long-term cycle.

Description

technical field [0001] The invention relates to the technical field of energy storage devices, in particular, to a polypeptide electrode, a supercapacitor prepared therefrom and a preparation method thereof. Background technique [0002] A supercapacitor is a new type of energy storage device that mainly relies on electric double layer capacitance and redox pseudocapacitance for charge storage. As a new type of green energy storage device, supercapacitors have the advantages of high specific energy of batteries and high specific power of traditional physical capacitors. Since Maxwell of the United States, NEC of Japan and Panasonic Corporation launched mature market products at the beginning of this century, supercapacitors have been successfully used in fields such as hybrid electric vehicles, wind power generation, solar power generation, military industry, smart grid and industrial UPS, and are used in industrial control, It has huge application value and market potentia...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/26H01G11/86H01G11/84
CPCY02E60/13H01G11/24H01G11/26H01G11/30H01G11/46H01G11/84H01G11/86
Inventor 胡宽郑超王璐安淼秦伟
Owner 深圳探影生物科技有限公司
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