Beijing time on September 29, Science Daily reported that scientists are now looking for ways to optimize solar energy. Silicon photovoltaic solar panels, dye-sensitized solar cells, concentrated solar panels, and thermodynamic solar power plants all pursue the same goal: in order to obtain the maximum amount of sunlight from the sun. These electrons can be converted into electricity for the purpose of lighting and providing energy for refrigerators.
Dye-sensitized solar cells that mimic plant photosynthesis
At the EPFL photonics and interface laboratory in Lausanne, Switzerland, scientists led by photoelectrochemistry scientist Michael Grätzel invented dye-sensitized solar cells that mimic plant photosynthesis. They also developed Decomposition of water through the sun produces fuel such as hydrogen.
In order to achieve this goal, they either have to use photocatalytic hydrogen-producing cells that can directly decompose water into hydrogen and oxygen when exposed to sunlight, or they must combine power generation cells and electrolyzers that break down water molecules. Using the second method, Jingshan Luo, a doctoral student at Glazer, and his colleagues have achieved amazing results. This achievement was published in the journal Science.
On perovskite solar panels, their devices convert 12.3% of the sun's scattered energy into hydrogen. This compound can be obtained in the laboratory through common materials, such as those used in conventional automotive batteries. The rare earth metals needed to produce available hydrogen fuel.
This high efficiency has led to fierce competition among other technologies that convert solar energy, but this latest method has other advantages: “The perovskites used in the batteries, as well as the nickel and iron catalysts that make up the electrodes, all that is needed is Earth. There are plenty of cheap and available resources," Luo explained. "In addition, the performance of our electrodes is as good as the usual use of the more expensive platinum-based models."
On the other hand, converting solar energy to hydrogen makes its storage possible, which underscores one of the biggest problems facing renewable electricity – it requires that it must be used when it is produced. "Once you have hydrogen, you can store it in a bottle and use it when you need it," Glazell said.
Such a gas can indeed be burned in a boiler or an engine, and it will only produce water vapor. It can also put fuel cells and generate the required amount of electricity. At present, the 12.3% conversion efficiency obtained by the Swiss Federal Institute of Technology in Lausanne, Switzerland, "will become even higher in the future," Glazer said.
Such high conversion efficiency is based on a feature of perovskite batteries: they are capable of generating an open circuit voltage of more than 1 volt (compared to a silicon battery producing only 0.7 volts). "Water electrolysis requires 1.7 volts or more to get a usable gas," Luo said. In order to achieve this goal, at least three or more silicon cells are required. However, only two cells are required for the use of perovskite cells.
Therefore, considering the surface required for light absorption, the use of perovskite cells is more efficient. “This is the first time that we have used only two batteries to obtain hydrogen through electrolysis.†The fact that the solar cell produces a large number of bubbles soon after the solar cell is exposed to sunlight is more than eloquent: the combination of the sun and water heralds R&D. Future energy is very promising and exciting new method.
1. Made from zirconium, anti-bacteria, anti-fouling, non-toxic and non-corrosive.Super hard, high-density and sharp blade, not easy to be blunt.No reaction with any food and can preserve the original color and taste of the food, keep the food's freshness and nutrition.
2. the big santoku is an all-purpose knife for everyday slicing. dicing and mincing. the samll santoku knife effortlessly gides through small vegetables and fruits. The beveled doubled-sided, cutting edge will thinly slice anything, becoming a favorite knife in the kitchen
3. Not for Cutting Bones, Coconut Shells or Super Hard objects.Do not use Ceramic Knife for chopping bone, prying, striking and it can dish-washing .
4. Well-balanced design with comfortable and lightweight ergonomic handles.
Ceramic Santoku Knife,Ceramic Cooking Knives,Ceramic Big Santoku Knife,Sharpe Ceramic Santoku Knife
BOHAO ENTERPRISE CO., LTD , https://www.yj-bohao.com