CN113437405A

CN113437405A - Evaporation induction power generation battery design based on MOF801@ PAN material

Info

Publication number: CN113437405A
Application number: CN202110688431.1A
Authority: CN
Inventors: 刘宪华; 李璟玉; 戴业欣
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-09-24

Abstract

The invention discloses an evaporation-induced power generation battery based on a MOF801@ PAN material. The MOF801@ PAN material modified by the PAN material is synthesized by utilizing the strong water absorption characteristic of the MOF801 material and the high conductivity of PAN, the material has high Zeta potential and proper conductivity, the MOF801@ PAN material is subjected to series treatment, and the material is prepared into an evaporation induction electricity generation battery after series design. The material provides an ion channel with high Zeta potential for evaporation induction, and improves the electricity generation efficiency of the evaporation induction electricity generation battery in deionized water.

Description

Evaporation induction power generation battery design based on MOF801@ PAN material

Technical Field

The invention relates to an evaporation-induced power generation battery design based on a MOF801@ PAN material.

Background

The current overuse of traditional fossil fuels leads to global climate change and environmental pollution problems. Capturing clean energy from non-traditional green sources is crucial to human and even social sustainability. Where water evaporation is a common spontaneous phenomenon that can occur constantly under any conditions. At present, researches show that natural water evaporation can generate continuous direct current voltage in a porous carbon material film, and meanwhile, partial carbon-based materials and metal oxides can be used as evaporation-induced electricity generation materials, so that ideal materials are found in the field of new energy, and the technology capable of inducing and generating high output voltage and current is a great technical bottleneck in the field. The evaporation induced electricity generation is that when water molecules move in the charged capillary tube, ions carrying charges opposite to those of the capillary tube move in the tube, so that a potential difference is generated, and voltage and current are generated. Therefore, the electrogenic functional region should have a long and narrow capillary channel for water molecules to move with counter ions, and secondly, the inducing material should have a high Zeta potential to facilitate the generation of a high concentration of counter film in the double electric layer.

The Metal Organic Framework (MOF) is a new environment-adjustable functional material, has a high specific surface area and a high Zeta potential, and has potential application value in the field of evaporation-induced power generation. If a new material could be constructed that not only has a high level of electrical conductivity, but also has a high Zeta potential, it could be used in the field of evaporation-induced power generation to achieve high efficiency of evaporation-induced power generation.

Based on the research and analysis, the invention constructs a novel high-Zeta potential material based on the MOF material and Polyaniline (PAN) and processes the material to be used for evaporation-induced power generation.

Disclosure of Invention

The invention aims to construct a novel evaporation-induced electrogenesis battery by using an evaporation-induced electrogenesis material MOF801@ PAN based on an MOF801 material and a Polyaniline (PAN) material. The invention fully utilizes the high conductivity of the PAN material and the high Zeta potential of the MOF material, and provides a new idea for the expansion of the evaporation-induced power generation material.

The invention adopts the following technical scheme:

an evaporation-induced power generation cell design based on a MOF801@ PAN material, comprising the following steps:

preparation of MOF801@ PAN material: (steps (1) - (2)) and the construction of the evaporation-induced power generation battery: (Steps (3) to (6)).

(1) Preparation of MOF801@ PAN material. Mixing certain amounts of fumaric acid, PAN and ZrOCl₂·8H₂And (3) placing the O in a mixed solvent of DMF and formic acid, magnetically stirring for 30min, placing the mixture in a high-pressure reaction kettle with a polytetrafluoroethylene lining, and heating for 6h at 130 ℃.

(2) MOF801@ PAN material activation. The product was collected by microfiltration membrane vacuum filtration apparatus, washed 3 times with DMF, 3 times with methanol and dried in air. The MOF801@ PAN sample prepared above was placed in a vacuum oven at 15kPa for 24h activation at 150 ℃.

(3) And (3) preparing an electrode of the evaporation-induced electricity-generating battery. Coating conductive silver adhesive on a glass plate, forming two symmetrical L-shaped electrodes at two ends of the glass plate, and drying at room temperature.

(4) A preparation method of slurry of an electricity generating functional area. A quantity of MOF801@ PAN material was dispersed in water and span 80 and Nafion solution in ethanol was added to the dispersion under vigorous magnetic stirring. The mixture was then stirred for 2 hours, then a certain amount of solution containing ethyl cellulose was added and stirring was continued until a pasty dispersion was obtained.

(5) And preparing the electricity generating functional area. And (3) uniformly coating the slurry prepared in the step (4) on the electrode glass plate prepared in the step (3), and drying and fixing the electrode glass plate in an oven at the temperature of 60 ℃.

(6) An evaporation induction battery electrogenesis performance test method. The glass sheet is immersed in deionized water to form a dry-wet interface in the electrogenesis functional area, and the voltage and current changes are recorded by an electrochemical workstation.

The amount of the PAN material doped in the step (1) was 0.1g, and fumaric acid and ZrOCl were added₂·8H₂The ratio of O is 1: 1, and the volume ratio of DMF and formic acid is 2: 1.

The filtering membrane in the step (2) is an organic microporous filtering membrane, and the aperture of the filtering membrane is 45 mu m.

The width of the silver colloid coated on the glass sheet in the step (3) is 5mm, and the width of the silver colloid layer contacting with the electricity generating functional area is 10 mm.

The span 80 concentration of the ethanol solution in the step (4) is 5 wt%, and 5. mu.L of 5 wt% Nafion solution is taken.

In the step (4), the preparation solvent of the ethyl cellulose solution is toluene and ethanol, and the volume ratio of the toluene to the ethanol is 4: 1.

The sub-surface immersed power generating assembly in step (6) is maintained below 1/3 of the total available power generating assembly.

The invention has the following advantages:

(1) the invention utilizes the advantages of MOF material and PAN to synthesize a novel material with high Zeta potential and good conductivity, and the novel material is used in the field of evaporation-induced power generation.

(2) The invention can meet the power supply requirement of small electrical appliances in extreme environments, and achieves no additional kinetic energy input and no pollution generation by utilizing the common evaporation power generation in the nature.

(3) The battery power generation functional area has the advantages of simple preparation process, low requirement on equipment, diversified application forms, less structural limitation and wide prospect in industrial application.

(4) The invention provides a new idea for the application of the MOF material.

Drawings

FIG. 1 is a schematic diagram of an electricity generating assembly for evaporation induced electricity generation;

FIG. 2 is a graph of the generated voltage of the evaporation induced power generation cell;

FIG. 3 is an electrogenesis current diagram of an evaporation induced electrogenesis cell;

Detailed Description

The present invention is further illustrated by the following specific examples, but the scope of the present invention is not limited thereto, and various modifications or variations can be made by those skilled in the art without inventive efforts based on the technical solution of the present invention.

Example 1 a specific preparation of MOF801@ PAN was as follows:

first (14mmol, 1.624g) of fumaric acid and (14mmol, 4.48g) of ZrOCl₂·8H₂Placing O in a 100ml high-pressure reaction kettle with a polytetrafluoroethylene lining, adding a mixed solvent of N, N Dimethylformamide (DMF) and Formic Acid (FA), stirring for 30min to fully dissolve, and then adding 0.1g PAN into the system to fully disperse in the system. The oven was adjusted to 130 ℃ and after 6h of reaction, the product was washed two to three times with methanol and DMF, respectively, and the material was collected with a 45 μm microporous filter. The above material was placed in a fume hood, allowed to dry naturally at room temperature, and then placed in a vacuum oven at 15kPa for 24h at 150 ℃.

Embodiment 2 specific construction process of evaporation induced power generation battery, the specific steps are as follows:

an evaporation-induced electrogenic cell based on the MOF801@ PAN material was fabricated using a rectangular glass slide, and commercial conductive silver paste was coated on the glass slide to form two symmetrical "L-shaped" electrodes at the upper and lower ends of the glass slide, the width of which was 5mm, until it was dried. Taking 0.75g of activated MOF801@ PAN material, dispersing the material in 1.5ml of deionized water, adding 50 mu L of span 80 (the solvent is ethanol) with the mass concentration of 5 wt% and 5 mu L of Nafion solution with the mass concentration of 5 wt% under vigorous stirring, adding 1ml of ethyl cellulose solution (0.75g of ethyl cellulose, 1ml of methanol and 4ml of toluene) after vigorously stirring the mixed system for 2 hours, stirring for 2 minutes to obtain a pasty dispersion system, uniformly coating the pasty material in the center of a glass slide, wherein the material range is 10mm multiplied by 50mm, and the material coating is controlled to be 1mm in thickness.

Claims

1. An evaporation-induced power generation cell design based on MOF801@ PAN material, comprising the following operation steps:

(1) preparation of MOF801@ PAN Material by reacting a quantity of fumaric acid, PAN and ZrOCl₂·8H₂And (3) placing the O in a mixed solvent of DMF and formic acid, magnetically stirring for 30min, placing the mixture in a high-pressure reaction kettle with a polytetrafluoroethylene lining, and heating for 6h at 130 ℃.

(2) The MOF801@ PAN material was activated and the product was collected by microfiltration membrane vacuum filtration device, washed 3 times with DMF, 3 times with methanol and dried in air. The MOF801@ PAN sample prepared above was placed in a vacuum oven at 15kPa for 24h activation at 150 ℃.

(3) The preparation method of the evaporation-induced electrogenesis battery electrode comprises the steps of coating conductive silver adhesive on a glass plate, forming two symmetrical L-shaped electrodes at two ends of the glass plate, and drying at room temperature.

(4) The preparation method of the slurry of the electrogenesis function area comprises the steps of removing a certain amount of MOF801@ PAN material, dispersing in water, and adding span 80 and Nafion solution of ethanol solution into the dispersion under the condition of vigorous magnetic stirring. The mixture was then stirred for 2 hours, then a certain amount of solution containing ethyl cellulose was added and stirring was continued until a pasty dispersion was obtained.

(5) And (3) preparing an electricity generating functional area, namely uniformly coating the slurry prepared in the step (4) on the electrode glass plate prepared in the step (3), and drying and fixing the electrode glass plate in an oven at the temperature of 60 ℃.

(6) The method for testing the power generation performance of the evaporation induction battery comprises the steps of immersing a glass sheet into deionized water, forming a dry-wet interface in a power generation functional area, and recording the voltage and current change conditions of the dry-wet interface by using an electrochemical workstation.

2. The process of claim 1, wherein (1) the doped material in the MOF801 is PAN.

3. The process according to claim 1, wherein the glass plate used in (3) is a glass slide.

4. The process of claim 1, wherein the evaporation inducing material selected in (4) is self-synthesized MOF801@ PAN.

5. The process of claim 1, wherein the binder selected in (4) is ethyl cellulose.

6. The process according to claim 1, wherein the electricity generating functional region in (5) has a size of 10mm by 50mm and a thickness of 1 mm.

7. The process according to claim 1, wherein the electrogenesis inducer used in (6) is deionized water.

8. The process of claim 1, wherein the wet-dry interface in (6) is 1/3 for the effective power generation area.