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ZIF-67@LDHs electrode material applied to supercapacitor and preparation method thereof

A ZIF-67, supercapacitor technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve problems such as stacking and poor conductivity, and achieve increased ratio Effects of surface area, improved electrical conductivity, and mild reaction conditions

Active Publication Date: 2021-08-03
缪长青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the existence of LDHs in the above prior art as supercapacitor electrode materials, there is a certain degree of poor conductivity, it is difficult to give full play to its theoretical specific capacitance, and the single-layer LDHs nanosheets after peeling are prone to self-stacking defects. The purpose of the present invention is to Provide a ZIF-67@LDHs electrode material applied to supercapacitors, the electrode material has a core-shell structure, wherein the "core structure" is a metal organic framework material ZIF-67, and the "shell structure" is a layered double metal hydroxide LDHs

Method used

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  • ZIF-67@LDHs electrode material applied to supercapacitor and preparation method thereof
  • ZIF-67@LDHs electrode material applied to supercapacitor and preparation method thereof
  • ZIF-67@LDHs electrode material applied to supercapacitor and preparation method thereof

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Embodiment 1

[0023] A preparation method for a ZIF-67@LDHs electrode material applied to a supercapacitor, specifically comprising the following steps:

[0024] S1: Aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) added to deionized water, ultrasonically dissolved, and then added urea and ammonium fluoride (NH 4 F), stirring at room temperature for 30min to obtain a precursor solution, in which urea and ammonium fluoride (NH 4 The molar ratio of F) is 1.22:0.69.

[0025] S2: Move the precursor solution to a high-pressure reactor, then react at 120°C for 6.5 hours, cool, then sonicate for 10min, filter, wash with deionized water, add it to ethylene glycol dimethyl ether again, and sonicate for 30min , and then filtered and dried at 65°C to obtain LDHs material, in which the molar ratio of aluminum nitrate, cobalt nitrate and urea was 0.55:0.69:1.

[0026] S3: Add the LDHs material in step S2 to the methanol solution, then add cobalt nitrate, and then so...

Embodiment 2

[0028] A preparation method for a ZIF-67@LDHs electrode material applied to a supercapacitor, specifically comprising the following steps:

[0029] S1: Aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) added to deionized water, ultrasonically dissolved, and then added urea and ammonium fluoride (NH 4 F), stirring at room temperature for 50min to obtain a precursor solution, in which urea and ammonium fluoride (NH 4 The molar ratio of F) is 2.4:1.32.

[0030]S2: Move the precursor solution to a high-pressure reactor, then react at 140°C for 10 hours, cool, then sonicate for 20min, filter, wash with deionized water, add it to ethylene glycol dimethyl ether again, and sonicate for 45min, Then it was filtered and dried at 80°C to obtain LDHs material, in which the molar ratio of aluminum nitrate, cobalt nitrate and urea was 1.15:1.25:1.

[0031] S3: Add the LDHs material in step S2 to the methanol solution, then add cobalt nitrate and then soni...

Embodiment 3

[0033] A preparation method for a ZIF-67@LDHs electrode material applied to a supercapacitor, specifically comprising the following steps:

[0034] S1: Aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) added to deionized water, ultrasonically dissolved, and then added urea and ammonium fluoride (NH 4 F), stirring at room temperature for 40min to obtain a precursor solution, in which urea and ammonium fluoride (NH 4 The molar ratio of F) is 1.96:1.21.

[0035] S2: Move the precursor solution to a high-pressure reactor, then react at 130°C for 8 hours, cool, then sonicate for 15min, filter, wash with deionized water, add it to ethylene glycol dimethyl ether again, and sonicate for 40min, Then it was filtered and dried at 70°C to obtain LDHs material, in which the molar ratio of aluminum nitrate, cobalt nitrate and urea was 0.94:1.13:1.

[0036] S3: Add the LDHs material in step S2 to the methanol solution, then add cobalt nitrate and then son...

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Abstract

The invention discloses a ZIF-67@LDHs electrode material applied to a supercapacitor and a preparation method thereof. The electrode material has a core-shell structure, the core structure is a metal organic framework material, and the shell structure is layered double hydroxides LDHs. The method comprises the following steps: adding trivalent metal ions M<3+> and divalent metal ions M<2+> into deionized water, carrying out ultrasonic dissolution, adding urea and ammonium fluoride (NH4F), stirring to obtain a precursor solution, transferring the precursor solution into a high-pressure reaction kettle, reacting at 120-140 DEG C, cooling, carrying out ultrasonic treatment, filtering, washing with deionized water, adding into deionized water again, carrying out ultrasonic treatment, filtering, drying to obtain an LDHs material; adding an LDHs material into a methanol solution, carrying out ultrasonic treatment for 40-60 minutes to obtain a mixed solution I, adding 2-methylimidazole into the methanol solution, carrying out ultrasonic dissolution to obtain a solution II, adding the solution II into the mixed solution I, carrying out magnetic stirring for 5-8 hours, centrifuging, filtering, and respectively washing with methanol and deionized water to obtain the ZIF-67@LDHs material.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to a ZIF-67@LDHs electrode material applied to supercapacitors and a preparation method thereof. Background technique [0002] In recent years, two-dimensional layered materials have attracted people's attention due to their novel physical and chemical properties. Based on the special structural characteristics of these materials, their applications in the fields of electricity, light, and catalysis have also been reported. In the typical field of electronics, the geometry of two-dimensional materials is more operable, and it is easier to be directly compatible with device design and operation in the semiconductor industry, which can overcome the inherent differences in diameters, lengths, and even electronic properties of one-dimensional structures. limitation. [0003] Layered composite double metal hydroxides (LDHs for short) are typical re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/24H01G11/30H01G11/86B82Y30/00B82Y40/00
CPCH01G11/26H01G11/24H01G11/30H01G11/86B82Y30/00B82Y40/00Y02E60/13
Inventor 任颖超
Owner 缪长青
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