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Nano-scale electrochemically expanded graphite paper conductive substrate and preparation method thereof

A technology of expanded graphite and conductive matrix, applied in the field of materials, can solve problems such as complex preparation conditions, and achieve the effects of simple preparation method, reduced capacitance loss and low production cost

Inactive Publication Date: 2019-12-24
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses an electrochemical workstation as the power supply, graphite paper as the cathode, a platinum sheet as the anode, and a saturated calomel electrode as the reference electrode, and the preparation conditions are relatively complicated.

Method used

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  • Nano-scale electrochemically expanded graphite paper conductive substrate and preparation method thereof
  • Nano-scale electrochemically expanded graphite paper conductive substrate and preparation method thereof
  • Nano-scale electrochemically expanded graphite paper conductive substrate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1: NiCo-LDH@EGP prepared according to the method of the present invention

[0036] Take two pieces of graphite paper and cut them to a size of 1 cm × 3 cm × 1 mm, ultrasonically clean them with ethanol for 5 min, and then dry them at 80°C; dissolve 150 mg of TBA in 30 ml of acetonitrile solution and stir to dissolve; Clamp two pieces of GP with electrode clamps, align them and insert them into the above mixture; the voltage between the two electrodes is controlled at 10 V, and the electrochemical intercalation expands for 15 minutes. The graphite paper expanded by electrochemical intercalation was freeze-dried at minus 50°C for 12 hours to obtain a conductive matrix material (EGP). Weigh 146 mg Ni(NO 3 ) 2 ∙6H 2 O, 292 mg Co(NO 3 ) 2 ∙6H 2 O, 120 mg urea, and dissolved in 30 ml deionized water, stirred for 10 min, until fully dissolved. Add freeze-dried EGP and let stand for 30 min. The solution was then poured into a 50 ml reaction kettle. Incubate at ...

Embodiment 2

[0038] Example 2: NiCo-LDH@EGP-2 prepared according to the method of the present invention

[0039] Take two pieces of graphite paper and cut them to a size of 1 cm × 3 cm × 1 mm, ultrasonically clean them with ethanol for 5 min, and then dry them at 80°C; dissolve 150 mg of TPA in 30 ml of acetonitrile solution and stir to dissolve; Clamp two pieces of GP with electrode clamps, align them and insert them into the above mixture; the voltage between the two electrodes is controlled at 10 V, and the electrochemical intercalation expands for 15 minutes. The graphite paper expanded by electrochemical intercalation was freeze-dried at minus 50°C for 12 hours to obtain a conductive matrix material (EGP). Weigh 146 mg Ni(NO 3 ) 2 ∙6H 2 O, 292 mg Co(NO 3 ) 2 ∙6H 2 O, 120 mg urea, and dissolved in 30 ml deionized water, stirred for 10 min, until fully dissolved. Add freeze-dried EGP and let stand for 30 min. The solution was then poured into a 50 ml reaction kettle. Incubate a...

Embodiment 3

[0041] Example 3: NiCo-LDH@EGP-3 prepared according to the method of the present invention

[0042] Take two pieces of graphite paper and cut them to a size of 1 cm × 3 cm × 1 mm, ultrasonically clean them with ethanol for 5 min, and then dry them at 80°C; dissolve 150 mg of THA in 30 ml of acetonitrile solution and stir to dissolve; Clamp two pieces of GP with electrode clamps, align them and insert them into the above mixture; the voltage between the two electrodes is controlled at 10 V, and the electrochemical intercalation expands for 15 minutes. The graphite paper expanded by electrochemical intercalation was freeze-dried at minus 50°C for 12 hours to obtain a conductive matrix material (EGP). Weigh 146 mg Ni(NO 3 ) 2 ∙6H 2 O, 292 mg Co(NO 3 ) 2 ∙6H 2 O, 120 mg urea, and dissolved in 30 ml deionized water, stirred for 10 min, until fully dissolved. Add freeze-dried EGP and let stand for 30 min. The solution was then poured into a 50 ml reaction kettle. Incubate a...

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Abstract

The invention discloses a nano-scale electrochemically expanded graphite paper conductive substrate and a preparation method thereof. According to the invention, low-cost graphite paper is used as a raw material; tetrabutylammonium bromide, tetrapropylammonium bromide and tetraheptylammonium bromide are used as an intercalating agent; acetonitrile is used as a solvent; a two-electrode method is used to carry out intercalation expansion to prepare three-dimensional nano-scale lamellar graphite as a conductive substrate; and NiCo-LDH nanowires grow in situ through a hydrothermal method. The electrode of the material applied to a supercapacitor has high specific capacitance, high rate performance and excellent cycle stability. The material has the advantages of simple preparation process andlow cost, and is suitable for industrial applications.

Description

technical field [0001] The invention relates to a nanoscale electrochemical intercalation expanded graphite paper conductive matrix and a preparation method and application thereof, belonging to the technical field of materials. Background technique [0002] As an electrochemical energy storage device, supercapacitor has a series of advantages such as high energy density, long cycle life, small size, simple and portable, safe and non-polluting, and is widely used in mobile communications, information technology, consumer electronics, electric vehicles, aerospace It has broad application prospects in national defense science and technology, and is considered to be an ideal chemical power source. At present, commercial supercapacitors mainly use activated carbon as the electrode material. The performance of supercapacitors mainly depends on the specific surface area, pore size distribution, microstructure and conductivity of the electrode materials used. [0003] Compared wi...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/86C01B32/225
CPCC01B32/225H01G11/24H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 王延忠刘月鑫陈彦俊李丹王超郭丽
Owner ZHONGBEI UNIV
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