CN114915212B - Evaporation and power generation device based on sprayable CB/PVDF material - Google Patents
Evaporation and power generation device based on sprayable CB/PVDF material Download PDFInfo
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- CN114915212B CN114915212B CN202210472778.7A CN202210472778A CN114915212B CN 114915212 B CN114915212 B CN 114915212B CN 202210472778 A CN202210472778 A CN 202210472778A CN 114915212 B CN114915212 B CN 114915212B
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- 238000001704 evaporation Methods 0.000 title claims abstract description 155
- 230000008020 evaporation Effects 0.000 title claims abstract description 151
- 238000010248 power generation Methods 0.000 title claims abstract description 121
- 239000000463 material Substances 0.000 title claims abstract description 87
- 239000002033 PVDF binder Substances 0.000 title claims abstract description 39
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 13
- 239000006229 carbon black Substances 0.000 claims abstract description 3
- 238000003860 storage Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002243 precursor Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 230000005660 hydrophilic surface Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 230000005661 hydrophobic surface Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 239000013535 sea water Substances 0.000 abstract description 15
- 238000000746 purification Methods 0.000 abstract description 8
- 238000010612 desalination reaction Methods 0.000 abstract description 7
- 239000002351 wastewater Substances 0.000 abstract description 7
- 230000002745 absorbent Effects 0.000 abstract description 4
- 239000002250 absorbent Substances 0.000 abstract description 4
- 239000006260 foam Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses an evaporation and power generation device based on a sprayable CB/PVDF material, which comprises: the glass cover, the evaporation and power generation unit and the water reservoir are arranged in the glass cover; the evaporation and power generation unit comprises a plurality of mutually connected evaporation and power generation materials, and the evaporation and power generation materials are water-absorbing paper with single-sided sprayed CB/PVDF composite material; then the evaporation and power generation unit is inserted into the water storage device, covered by the glass cover and connected with the digital ammeter, the digital ammeter performs evaporation power generation under the irradiation of sunlight, the digital ammeter tests the current and voltage in real time, and the evaporation is performed while the evaporation power generation is performed, so that clean water is collected. The open-circuit voltage and the short-circuit current of the single evaporation power generation material can reach 0.32V and 1.5 mu A respectively; in addition, carbon black, absorbent paper, etc. are inexpensive commercial products, easy to obtain, and the device performs sea water desalination or waste water purification while performing evaporation power generation.
Description
Technical Field
The invention belongs to the field of energy conversion function surface interface materials, and particularly relates to an evaporation and power generation device based on a sprayable CB/PVDF material.
Background
With the rapid development of economy and industry and the rapid growth of population, the demand of people for energy is continuously increased, fossil energy is greatly utilized, energy crisis and water pollution are serious, and new energy production technology is needed. There is a large amount of undeveloped energy in the environment, so collecting electrical energy from renewable resources is considered a promising solution to address the increasingly serious energy crisis. Water evaporation induced power generation is the capture of energy from the evaporation of water driven by environmental thermal energy. Meanwhile, clean water can be collected in the water evaporation process, so that the effects of sea water desalination or wastewater purification are achieved. Therefore, a simple method is provided for the water-induced evaporation power generation technology, and another way is provided for sea water desalination and wastewater purification.
Previous researches overcome the problems of poor power generation performance and low evaporation efficiency to a certain extent, however, the problems of expensive materials, complex preparation process and the like are unfavorable for large-scale commercial production, and further the development progress of the materials is hindered.
In view of the above, there is a need to design an evaporation power generation and evaporation device suitable for large-scale commercial production, which has excellent power generation performance and excellent evaporation efficiency; and has the characteristics of simple preparation process, low cost of raw materials and wide sources.
Disclosure of Invention
The invention aims at the technical problems and provides an evaporation and power generation device based on a sprayable CB/PVDF material, which is characterized in that the evaporation and power generation device is used for generating a solar light (1 kW/m) 2 ) Under, have stable evaporation power generation performance output and water evaporation efficiency, its open circuit voltage, short circuit current are respectively: 0.32V, 1.5. Mu.A. The water evaporation rate was 1.436kg/m 2 The evaporation efficiency can reach 90%. The invention can continuously and stably output, can perform evaporation power generation, has evaporation performance, collects clean water and performs sea water desalination or wastewater purification.
An evaporative and power generation device based on sprayable CB/PVDF material, comprising: the glass cover, the evaporation and power generation unit and the water reservoir are arranged in the glass cover;
the evaporation and power generation unit comprises a plurality of mutually connected evaporation and power generation materials, and the evaporation and power generation materials are water-absorbing paper with single-sided sprayed CB/PVDF composite material; then the evaporating and generating unit is inserted into the water storage device, the evaporating and generating materials are connected end to form a loop, the loop is covered by a glass cover and then connected with the digital ammeter, the evaporating and generating unit is used for evaporating and generating under the irradiation of sunlight, and the digital ammeter is used for testing the current and the voltage in real time. The water reservoir provides water resources (pure water, seawater and contaminated water); providing moisture for its constant evaporation; the glass cover is used for collecting clean water and has the functions of sea water desalination or waste water purification. The aim of using CB and PVDF blends as composite materials is to: PVDF is used as an adhesive, and the CB/PVDF composite solution can be sprayed on water-absorbing paper, is not easy to fall off, and can be continuously and stably evaporated and used for generating power. The CB/PVDF evaporation and power generation material has the advantages that the surface is adhered with a carbon-based material, and the light absorption performance is high.
Furthermore, the evaporation and power generation materials are connected in series or in parallel.
Furthermore, the water absorbing paper is made of pure natural plant fibers, and the surface of the water absorbing paper is in a strip-shaped structure, so that water molecules are allowed to flow.
Further, one surface of the water-absorbing paper, which is not sprayed with the CB/PVDF composite material, is a hydrophilic surface, and one surface of the water-absorbing paper, which is sprayed with the CB/PVDF composite material, is a hydrophobic coating; one end of the evaporation and power generation material is placed in the water receiver, water molecules are continuously conveyed upwards through the hydrophilic surface, and the hydrophobic surface is used for absorbing sunlight heat so as to accelerate water evaporation.
Further, the preparation method of the evaporation and power generation material comprises the following steps:
s1, dissolving PVDF in a small amount of solvent, adding absolute ethyl alcohol after the solution is clear and transparent, uniformly mixing, adding CB, and uniformly mixing to obtain a CB/PVDF mixed solution, and obtaining a precursor solution of an evaporation and power generation material;
s2, uniformly spraying the precursor liquid on one surface of the water-absorbing paper, and drying to obtain the evaporation and power generation material of the CB/PVDF sprayed composite material;
s3, cutting the evaporation and power generation materials for subsequent experiments of evaporation power generation.
Further, the solvent is acetone and absolute ethyl alcohol, and the volume ratio is 5:4. The acetone and the absolute ethyl alcohol are used as solvents, and the purpose of the solvent is that the acetone can dissolve PVDF, and the absolute ethyl alcohol is used for replacing part of the acetone, so that the use amount of the acetone is reduced, and the environment-friendly requirement is met.
Further, the PVDF has a molecular weight of 90 ten thousand.
Further, the CB is fully water-soluble CB having a mesh of 4500 mesh and a mass of 45% of PVDF.
Further, the number of times of uniform spraying is 5, and the loading amount of carbon black is 0.0176+/-0.005 g.
The working process of the evaporation and power generation device comprises the following steps:
s1, connecting four evaporation and power generation materials in series, preparing a device with a truncated cone shape by attaching foam, inserting the device into a water reservoir, connecting the upper end and the lower end of the material respectively by using a wire, and then connecting the device with a digital ammeter to perform real-time current and voltage test;
s2, covering the whole device by using a glass cover, testing current and voltage in real time under the irradiation of simulated sunlight, and collecting clean water along with water evaporation.
The invention has the following beneficial effects:
1. the evaporation and power generation material prepared by the invention realizes effective evaporation power generation and evaporation, the device has stable performance output, and the open-circuit voltage and the short-circuit current are respectively as follows: 0.32V, 1.5. Mu.A. At the same time, under the irradiation of sunlight, clean water is effectively and continuously collected, and the water evaporation rate is about 1.436kg/m 2 The evaporation efficiency can reach 90%. Therefore, the device performs sea water desalination or wastewater purification while performing evaporation power generation.
2. In addition, the designed evaporation and power generation material is connected with four evaporation and power generation materials in series, and is attached to foam to prepare a round table type device, so that evaporation power generation and evaporation collection of clean water can be simultaneously carried out under the irradiation of sunlight.
3. The evaporation and power generation material prepared by the invention has the advantages of simple preparation process, wide sources of raw materials, low cost and large-scale preparation; provides a new interesting direction for future solar-driven photo-thermal water purification application and water evaporation power generation.
4. The spraying type paint is simple to operate; the CB on the device is not easy to fall off by utilizing the bonding effect of PVDF, can be reused and has stable performance;
5. only one side of the water-absorbing paper is sprayed, the spraying surface is a hydrophobic surface, the other side of the water-absorbing paper is kept as the original state, and the water molecules can be normally conveyed, so that the evaporation efficiency and the power generation performance are not affected; traditional materials may only be used for evaporation applications, while our devices may be used for both evaporation and power generation.
Drawings
FIG. 1 is a schematic view showing the structure of an evaporation and power generation device in example 1;
FIG. 2 shows a time-voltage, time-current diagram of the evaporation and power generation material of example 1;
FIG. 3 shows time-voltage diagrams of the evaporation and power generation materials of example 1 at different water qualities;
FIG. 4 shows a time-voltage plot for four evaporation and power generation materials in series in example 2;
FIG. 5 shows a time-current diagram for four parallel connection of evaporation and power generation materials in example 2;
fig. 6 shows a graph of evaporation rate of the evaporation and power generation material in pure water in example 2.
Fig. 7 shows the evaporation rate of the evaporation and power generation material in methyl orange solution, seawater in example 2.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following examples are set forth. The starting materials, reactions and workup procedures used in the examples are those commonly practiced in the market and known to those skilled in the art unless otherwise indicated.
The evaporation and power generation material is formed by connecting four evaporation and power generation materials in series to perform evaporation power generation and evaporation;
the water reservoir of the present invention provides water resources (pure water, seawater and contaminated water); providing moisture for constant evaporation;
the glass cover of the invention plays a role in sea water desalination or waste water purification for collecting clean water.
Example 1
An evaporation and power generation material, the evaporation and power generation material comprising evaporation power generation and evaporation;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the assembly of evaporation and power generation materials comprises:
CB/PVDF composite solution;
and (5) water absorbing paper.
Fig. 1 shows a schematic structural diagram of an evaporation and power generation material.
The preparation method of the evaporation and power generation material comprises the following steps:
preparation of evaporation and power generation materials:
s1, dissolving PVDF in acetone, adding absolute ethyl alcohol after the solution is clear and transparent, uniformly mixing, adding CB for mixing to obtain a CB/PVDF mixed solution, and obtaining a precursor solution of an evaporation and power generation material;
s2, spraying the precursor liquid on absorbent paper, and drying to obtain an evaporation and power generation material of the CB/PVDF sprayed composite material;
s3, cutting the evaporation and power generation materials into specific sizes, and carrying out subsequent experiments for evaporation power generation and evaporation.
Example 2
The working process of the evaporation and power generation material comprises the following steps:
s1, inserting four evaporation and power generation materials into a water receiver after being connected in series, attaching foam to prepare a round table type device, connecting the upper end and the lower end of the materials respectively by using a lead, and then connecting the materials with a digital ammeter to perform real-time current and voltage test;
s2, covering the whole device by using a glass cover, testing current and voltage in real time under the irradiation of simulated sunlight, and collecting clean water along with water evaporation.
Test case
In order to test the performance of the evaporation and power generation materials obtained in the above examples 1 and 2, the following test was made.
Test example 1: evaporation power generation test
The evaporation and power generation materials among the evaporation and power generation materials obtained in example 1 were subjected to an evaporation power generation test. The testing method comprises the following steps: the evaporation and power generation material is inserted into the water receiver, the evaporation and power generation material is connected with the digital ammeter by using a lead, the digital ammeter is connected with a computer through a USB interface, and the real-time output voltage of 300 seconds is collected. Finally, a conclusion is made that the stable open-circuit voltage of the evaporation and power generation material reaches 320mV; the short circuit current is approximately 1.5 muA. The results obtained are shown in FIGS. 2 (a) and (b).
Test example 2: research and test of evaporation power generation performance
The evaporation and power generation material obtained in example 1 was subjected to evaporation power generation performance test by changing the water quality. The testing method comprises the following steps: an evaporation and power generation material is inserted into the water reservoir by changing the water quality (aqueous solution, methyl orange solution, sea water). The evaporation and power generation materials are connected with a digital current voltmeter by using a lead, the digital current voltmeter is connected with a computer through a USB interface, and the real-time open-circuit voltage of 300 seconds is collected. The results obtained indicate that the evaporation and power generation material of example 1 has a significant increase in open circuit voltage when the water quality is methyl orange solution and seawater. The results obtained are shown in FIG. 3. Test example 3: series test of evaporation and power generation materials
The evaporation and power generation materials obtained in example 2 were subjected to evaporation power generation performance test in series of four. The testing method comprises the following steps: after four evaporation and power generation materials are connected in series, a device with a truncated cone shape is prepared by attaching foam, the device is inserted into a water reservoir (the solution is aqueous solution), the evaporation and power generation materials are connected with a digital ammeter by utilizing a lead, the digital ammeter is connected with a computer through a USB interface, and the real-time open-circuit voltage of 300 seconds is collected. The results obtained show that after four evaporation and power generation materials are connected in series, the open circuit voltage is obviously increased and is close to 1.2V. The results obtained are shown in FIG. 4.
Test example 4: parallel test of evaporation and power generation materials
The evaporation and power generation materials obtained in example 2 were subjected to evaporation power generation performance test in parallel with four. The testing method comprises the following steps: four evaporation and power generation materials are connected in parallel, then foam is attached to prepare a device with a round table, the device is inserted into a water reservoir (the solution is aqueous solution), the evaporation and power generation materials are connected with a digital ammeter by using a lead, the digital ammeter is connected with a computer through a USB interface, and real-time short-circuit current of 300 seconds is collected. The obtained results show that after four evaporation and power generation materials are connected in parallel, the short-circuit current is obviously increased and is close to 5 mu A. The results obtained are shown in FIG. 5.
Test example 5: evaporation rate test of evaporation and power generation materials
The evaporation rate test was performed on the evaporation and power generation materials obtained in example 2. The testing method comprises the following steps: an evaporation and power generation material was inserted into a water reservoir (the solution was an aqueous solution) under light, then placed on a balance, the mass loss of the reservoir was recorded in real time, and the mass loss was recorded for one hour, compared with the evaporation rate of pure absorbent paper under dark, light. The results obtained showed that the evaporation rate of the evaporation and power generation material of example 2 was significantly improved. The results are shown in FIG. 6.
Test example 6: evaporation rate test of evaporation and power generation materials
The evaporation rate test was performed on the evaporation and power generation materials obtained in example 2. The testing method comprises the following steps: under illumination, an evaporation and power generation material was inserted into the water reservoir (the solution was methyl orange solution, seawater) and then placed on a balance, and the mass loss of the reservoir was recorded in real time for one hour. The results obtained show that the evaporation rate of the solution, methyl orange solution and seawater, is better than that of pure absorbent paper, proving that it is desirable to collect clean water from seawater and contaminated water. The results obtained in (2) are shown in FIG. 7.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. An evaporation and power generation device based on sprayable CB/PVDF material, the evaporation and power generation device comprising: the glass cover, the evaporation and power generation unit and the water reservoir are arranged in the glass cover;
the evaporation and power generation unit comprises a plurality of mutually connected evaporation and power generation materials, and the evaporation and power generation materials are water-absorbing paper with single-sided sprayed CB/PVDF composite material; then inserting the evaporation and power generation unit into the water storage device, connecting the evaporation and power generation materials end to form a loop, covering the loop by a glass cover, connecting the loop with a digital ammeter, performing evaporation power generation under the irradiation of sunlight, and testing the ammeter and the voltage in real time by the digital ammeter;
the water absorbing paper is made of pure natural plant fibers, and has a strip-shaped surface, so that water molecules are allowed to flow;
the surface of the water-absorbing paper, which is not sprayed with the CB/PVDF composite material, is a hydrophilic surface, and the surface of the water-absorbing paper, which is sprayed with the CB/PVDF composite material, is a hydrophobic coating; one end of the evaporation and power generation material is placed in a water receiver, water molecules are continuously conveyed upwards through a hydrophilic surface, and the hydrophobic surface is used for absorbing sunlight heat so as to accelerate water evaporation;
the preparation method of the evaporation and power generation material comprises the following steps:
s1, dissolving PVDF in a small amount of solvent, adding absolute ethyl alcohol after the solution is clear and transparent, uniformly mixing, adding CB, and uniformly mixing to obtain a CB/PVDF mixed solution, and obtaining a precursor solution of an evaporation and power generation material;
s2, uniformly spraying the precursor liquid on one surface of the water-absorbing paper, and drying to obtain the evaporation and power generation material of the CB/PVDF sprayed composite material.
2. The sprayable CB/PVDF-based evaporation and power generation device according to claim 1, wherein the evaporation and power generation materials are connected in series or in parallel.
3. The sprayable CB/PVDF-based evaporation and power generation device according to claim 1, wherein the solvents are acetone and absolute ethanol in a volume ratio of 5:4.
4. The sprayable CB/PVDF-based evaporation and power generation device according to claim 1, wherein the PVDF molecular weight is 90 tens of thousands.
5. The evaporative and power generating device based on sprayable CB/PVDF material according to claim 1, wherein the CB is fully water soluble CB, having a mesh size of 4500 mesh, and having a mass of 45wt% of PVDF.
6. The sprayable CB/PVDF-based evaporation and power generation device according to claim 1, wherein the number of uniform sprays is 5 and the loading of carbon black is 0.0176 ± 0.005g.
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| CN202210472778.7A CN114915212B (en) | 2022-04-29 | 2022-04-29 | Evaporation and power generation device based on sprayable CB/PVDF material |
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2022
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