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Preparation method of carbon cloth supported bimetallic hydroxide material

A hydroxide and bimetal technology, which is applied in the field of preparation of bimetallic hydroxide materials supported by carbon cloth, can solve the problems of low utilization rate of raw materials, unfavorable large-scale production, space constraints of reaction vessels, etc. The effect of electrochemical activity

Active Publication Date: 2020-08-18
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrothermal deposition method is limited by the space constraints of the reaction vessel, and the electrodeposition method has the problem of low raw material utilization, which makes these methods unfavorable for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of double metal hydroxide materials supported by carbon cloth

[0023] At room temperature, mix 20mL of a mixed aqueous solution containing 30mmol / L cobalt nitrate and 20mmol / L zinc nitrate (the molar ratio of cobalt nitrate and zinc nitrate is 1:0.67) and 20mL of 0.4mol / L 2-methylimidazole aqueous solution, and magnetically stir for 30s , pour it into a 50mL glass square tank, insert two pieces of 3cm×4cm clean carbon cloth immediately, hang it for 4 hours, take out the carbon cloth sample and wash it with deionized water for 3 times, and then dry it in an oven at 60°C for 12 hours to obtain a carbon cloth Supported cobalt-zinc bimetallic organic framework materials.

[0024] Next, at room temperature, the obtained 3 cm × 4 cm carbon cloth-supported cobalt-zinc bimetallic organic framework material was used as a working electrode, and a saturated calomel electrode and a platinum electrode were used as a reference electrode and a counter electrode, respe...

Embodiment 2

[0030] (1) Preparation of double metal hydroxide materials supported by carbon cloth

[0031] At room temperature, mix 20mL of a mixed aqueous solution containing 20mmol / L cobalt nitrate and 20mmol / L nickel nitrate (the molar ratio of cobalt nitrate and nickel nitrate is 1:1) and 20mL of 0.35mol / L 2-methylimidazole aqueous solution, and magnetically stir for 60s , pour it into a 50mL glass container, insert two pieces of 3cm×4cm clean carbon cloth immediately, hang it for 6 hours, take out the carbon cloth sample and wash it with deionized water for 3 times, and then dry it in an oven at 80°C for 12 hours to obtain a carbon cloth supported Cobalt-nickel bimetallic organic framework materials;

[0032] Next, at room temperature, the obtained 3 cm × 4 cm carbon cloth-supported cobalt-nickel bimetallic organic framework material was used as a working electrode, and a saturated calomel electrode and a platinum electrode were used as a reference electrode and a counter electrode, r...

Embodiment 3

[0038] (1) Preparation of double metal hydroxide materials supported by carbon cloth

[0039] At room temperature, 20 mL of a mixed aqueous solution containing 20 mmol / L cobalt nitrate and 10 mmol / L copper nitrate (the molar ratio of cobalt nitrate and copper nitrate is 1:0.5) was mixed with 20 mL of 0.45 mol / L 2-methylimidazole aqueous solution, and magnetically stirred for 45 s. Pour it into a 50mL glass square tank, insert two pieces of 3cm×4cm clean carbon cloth immediately, hang it for 8 hours, take out the carbon cloth sample and wash it with deionized water for 3 times, and then dry it in an oven at 70°C for 12 hours to obtain a carbon cloth branch. Cobalt-copper bimetallic organic framework materials.

[0040] Next, at room temperature, the obtained 3 cm × 4 cm carbon cloth-supported cobalt-copper bimetallic organic framework material was used as a working electrode, and a saturated calomel electrode and a platinum electrode were used as a reference electrode and a cou...

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Abstract

The invention provides a preparation method of a carbon cloth supported bimetal hydroxide material. The method comprises the following steps of depositing a bimetal organic framework on the surface ofa flexible carbon cloth at room temperature, and carrying out electrochemical cyclic voltammetry treatment in an aqueous solution by using the bimetal organic framework as a precursor to prepare thecarbon cloth supported bimetal hydroxide material. The whole preparation process is carried out in an open container at room temperature without needing to heat and continuously stir, so that the large-scale enlarged production is facilitated. The metal organic framework material with a regular form is used as the precursor, and the prepared metal hydroxide has a relatively ordered multistage structure, so that the metal hydroxide is favorable for exerting better electrochemical activity; the bimetal hydroxide prepared by the method is attached to the conductive carbon cloth in situ, so that the bimetal hydroxide is favorably used for manufacturing a flexible device.

Description

technical field [0001] The invention relates to a preparation method of a carbon cloth-supported double metal hydroxide material, in particular to a flexible double metal hydroxide material for supercapacitors, alkaline batteries, and electrochemical sensors prepared with metal organic frameworks as the main raw material method of material. Background technique [0002] Transition metal hydroxide is a very typical electrode active material in supercapacitors, alkaline batteries, and electrochemical sensors. The double metal hydroxide developed in recent years has a wider electrochemical window and a higher Electrical conductivity, together with more electrochemically active sites, has become one of the best candidates for next-generation high-performance electrode materials. In-situ growth of bimetallic hydroxides on flexible conductive substrates (such as carbon cloth, carbon paper, carbon fiber braids, etc.) Electron transport and mechanical bonding, thereby improving t...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/32H01G11/46H01M4/131H01M4/1391H01M10/30
CPCH01G11/32H01G11/46H01G11/86H01M4/131H01M4/1391H01M10/30Y02E60/10
Inventor 陈浩沈哲红
Owner ZHEJIANG FORESTRY UNIVERSITY
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