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Heterostructure self-supporting electrode material and preparation method and application thereof

A self-supporting electrode and heterostructure technology, applied in electrodes, battery electrodes, structural parts, etc., can solve the problems of poor conductivity of MOFs, lack of active sites, restricting the transfer process, etc., to achieve a simple preparation process, enhanced conductivity, The effect of large catalytic performance

Active Publication Date: 2020-05-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mainly in the following aspects: (1) In the process of pyrolysis or calcination, the good topological structure of MOFs will be completely destroyed, and the structure determines the properties, so the destruction of the structure will directly lead to the loss of active sites to a certain extent (2) The conductivity of MOFs directly used in electrocatalytic applications is poor, which seriously restricts the electron transfer process

Method used

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  • Heterostructure self-supporting electrode material and preparation method and application thereof
  • Heterostructure self-supporting electrode material and preparation method and application thereof
  • Heterostructure self-supporting electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) will 5cm 2 Soak the carbon cloth in 50mL of acetone solution, sonicate for 1h, take out the carbon cloth, then soak it in 50mL of absolute ethanol for 20min, take out the carbon cloth and dry it in vacuum. Finally, place the above-mentioned carbon cloth in 50 mL of concentrated nitric acid (volume concentration: 86%) and soak it for 24 hours, take out the acid-etched carbon cloth and wash it with a large amount of deionized water until the solution is neutral, and place it in a vacuum oven at 40°C to dry for 12 hours. Cloth pre-processing process is completed, recorded as CC;

[0050] (2) 139.2mg fumaric acid (C 4 h 4 o 4 ) and CC into a 50mL beaker, add 25mL deionized water to ultrasonic for 15min, stir for 15min, until the solution is clear, slowly add 525.2mg ferric nitrate nonahydrate (Fe(NO 3 )3·9H 2 O) stirring for 5min, then transferred to a 50mL hydrothermal reaction kettle, heated at 110°C for 6h, and finally vacuum-dried to obtain MIL-88A / CC;

[0051...

Embodiment 2

[0059] (1) will 5cm 2 Soak the carbon cloth in 50mL of acetone solution, sonicate for 1h, take out the carbon cloth, then soak it in 50mL of absolute ethanol for 20min, take out the carbon cloth and dry it in vacuum. Finally, arrange the above-mentioned carbon in 50ml of concentrated nitric acid (volume concentration: 50%) and soak for 24h, take out the acid-etched carbon cloth and wash it with a large amount of deionized water until the solution is neutral, and place it in a vacuum oven at 40°C to dry for 12h. Cloth pre-processing process is completed, recorded as CC;

[0060] (2) 139.2mg fumaric acid (C 4 h 4 o 4 ) and CC into a 50mL beaker, add 25mL deionized water to ultrasonic for 15min, stir for 15min, until the solution is clear, slowly add 525.2mg ferric nitrate nonahydrate (Fe(NO 3 )3·9H 2 O) stirring for 5min, then transferred to a 50mL hydrothermal reaction kettle, heated at 110°C for 6h, and finally vacuum-dried to obtain MIL-88A / CC;

[0061] (3) Place the MI...

Embodiment 3

[0063] (1) will 5cm 2 Soak the carbon cloth in 50mL of acetone solution, sonicate for 1h, take out the carbon cloth, then soak it in 50mL of absolute ethanol for 20min, take out the carbon cloth and dry it in vacuum. Finally, arrange the above-mentioned carbon in 50ml of concentrated nitric acid (volume concentration: 86%) and soak for 24h, take out the acid-etched carbon cloth and wash it with a large amount of deionized water until the solution is neutral, and place it in a vacuum oven at 40°C for 12h to dry. Cloth pre-processing process is completed, recorded as CC;

[0064] (2) 139.2mg fumaric acid (C 4 h 4 o 4 ) and CC into a 50mL beaker, add 25mL deionized water to ultrasonic for 15min, stir for 15min, until the solution is clear, slowly add 525.2mg ferric nitrate nonahydrate (Fe(NO 3 )3·9H 2 O) stirring for 5min, then transferred to a 50mL hydrothermal reaction kettle, heated at 90°C for 6h, and finally vacuum-dried to obtain MIL-88A / CC;

[0065] (3) Place the MIL...

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Abstract

The invention belongs to the technical field of energy materials, and discloses preparation of a heterostructure self-supporting electrode material and an application. The method comprises the following steps: (1) firstly enabling MIL-88A to grow on the surface of carbon cloth through a hydrothermal reaction; (2) then enabling Ni (OH) 2 to grow on the surface of MIL-88A through a secondary hydrothermal reaction, so as to finish the preparation of the heterostructure self-supporting electrode. The method is simple and low in cost; the prepared composite material has excellent oxygen productionperformance and excellent long-term stability. The carbon cloth is used as a self-supporting electrode, so the defect of poor intrinsic conductivity of MIL-88A is overcome, and the organic metal framework plays the maximum catalytic performance. The preparation method is free of a high-temperature calcination process, energy is saved while an organic metal framework structure is not damaged, and the method is environmentally friendly and has industrial prospects.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and relates to a self-supporting electrode material with a heterogeneous structure and a preparation method and application thereof. The heterostructure material is mainly used to catalyze the oxygen evolution reaction (OER), which mainly occurs in metal-air batteries and water splitting, and is an important half-reaction, which is important for the energy conversion efficiency of metal-air batteries and water splitting. influences. Background technique [0002] Oxygen evolution reaction is the basic reaction of a variety of green energy storage and conversion devices such as metal-air batteries, photo / electrochemical water splitting, etc. However, the efficiency of OER has been greatly limited because the breaking of O-O bonds is a very slow kinetic process. limit. At present, OER catalysts are mainly based on noble metal materials, such as RuO 2 and IrO 2 However, the activity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/08C25B1/04C25B11/06C25B11/14
CPCC25B1/04C25B11/044C25B11/091H01M4/88H01M4/8817H01M4/8825H01M4/90H01M4/9008H01M4/9016H01M12/08Y02E60/36
Inventor 唐正华钱政鑫
Owner SOUTH CHINA UNIV OF TECH
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