Wednesday, April 17, 2024

The lithium-ion battery will be 60 percent charged in 5.6 minutes, scientists find the method

Electric vehicles (EVs) powered by lithium-ion batteries (LIBs) are one of the solutions to the problems related to air pollution and energy crisis and zero-emissions transportation devices. However, it takes longer to recharge an EV than the gas-refilling time of a conventional fuel vehicle, which is why people are hesitant to adopt it.

One of the biggest hurdles behind switching from gas-powered vehicles to battery-powered vehicles is the time taken to recharge the battery. For example, a battery vehicle takes about an hour to charge its battery from 40 percent to 80 percent. 

One of the major impediments to fast charging is the battery’s anode. Which is not a proper means of charging a lithium-ion battery. They also point out that the way content is lined up in them, and the size of the gap between them is also an important issue.

To overcome this problem, they applied the first particle-level theoretical model to optimize the spatial distribution of particles of different sizes and electrode porosity. They then used what they learned from the model after making changes to the standard graphite anode. They then heated the anode and then cooled it, allowing the solution to be more ordered by the material that clogged it.

The researchers glued the anode to a standard lithium-ion battery and then measured the time it took to charge. They found that they were able to charge the battery to 60 percent in just 5.6 minutes, with the battery charging up to 80 percent in just 11.4 minutes.

Scientists developed the world’s first LED light from rice bran

The research team from Hiroshima University’s Natural Science Center for Basic Research and Development has demonstrated this feat.

Because the typical silicon quantum dot (QD) often contains toxic substances, such as cadmium, Environmental concerns are often discussed when using nanomaterials. Our proposed process and fabrication method for QDs alleviates these concerns.

Since porous silicon (Si) was discovered in the 1950s, scientists have explored its use in lithium-ion batteries, luminescent materials, biomedical sensors, and drug delivery systems. It is poison-free and found abundantly in nature, silicon has photoluminescence properties, which result from its microscopic (quantum-sized) dot structures that act as semiconductors.

Aware of the environmental concerns surrounding current quantum dots, the researchers set about finding a new method for making quantum dots. Which has a good effect on the environment. It turns out that waste rice bran is an excellent source of high purity silica (silicon dioxide) and important silica powder.

The team used heat treatment and chemical methods to process rice bran silica. First, they extracted silica (silicon dioxide) powder by grinding rice bran and burning the organic compounds of ground rice bran. Second, they heated the resulting silica powder in an electric furnace to obtain the silica powder through a reduction reaction.

Third, the product was a pure silica powder that was reduced in size to 3 nanometers by a chemical method. Finally, its surface was chemically annealed for high chemical stability and high dispersion in a solvent, with 3 nm crystalline particles with a high luminescence efficiency of more than 20 percent with a silicon quantum scintillation in the orange-red range. Dot was produced.

The poison-free quality of silicon makes them an attractive alternative to the semiconductor quantum dots available today. He added that the current method is a good way to develop eco-friendly quantum dot LEDs from natural products.

The LED was assembled as a series of natural layers. It is a good conductor of electricity while also being quite transparent to emit light. Additional layers were then layered over the ITO glass, including a layer of silicon quantum dot. The material was sheathed with an aluminum film cathode.

Saito said that by mixing high-yield silicon quantum dots from abundant husks and dispersing them in organic solvents, it is possible that one day these processes could be implemented on a large scale like other high-yielding chemical processes.

The team said their next step involves developing high-efficiency, luminance sense in silicon quantum dots and LEDs. They will also explore the possibility of producing silicon quantum dot LEDs other than the orange-red ones they have just created.

Looking ahead, the scientists suggest that the method they developed could be applied to other plants, such as sugarcane, bamboo, wheat, barley, or grass, which contain silicon dioxide. These natural products and their toxic wastes have the potential to be converted into optoelectronic devices. The research is published in the American Chemical Society journal ACS Sustainable Chemistry and Engineering.

There may be a possibility of life on ‘Titan’ too, its structure is similar to that of Earth

For many decades, scientists have been investigating whether there is any such planet other than our Earth, where there may be a possibility of life. Even if this thing sounds like a fantasy or a fairy tale to you, recently scientists at Stanford University have informed us that the moon ‘Titan’ of Saturn, a planet in our solar system, is very similar to our Earth.

Significantly, ‘Titan’ is the largest moon of the planet Saturn and the second-largest natural satellite of the solar system. It is the only moon in our solar system that is known for its dense atmosphere. Not only this, it is the only known object in space other than Earth, on whose surface there is clear evidence of liquid present in a stable form.

Although these landscapes (rivers, lakes, canyons, dunes, and seas) look very much like our earth, they are made of materials that are undoubtedly different from our earth. Rivers of methane in liquid form flow over its icy surface and nitrogen-rich winds from dunes are made of hydrocarbons.

How to sand, dunes and plains are being formed on Titan

So, how these hydrocarbon-based substances on Titan turn into sand depends on how often there are winds there, while the flow of rivers is responsible for the sand on land. In this, Stanford University geologist Matthew Laporte and his colleagues have tried to explain.

For a long time, scientists have been trying to learn more and more about Titan because it is the only object in our solar system after Earth that has the same weather and seasonal flow of liquid as Earth.

According to scientists, the solid particles or sediments present on Titan are composed of soft hydrocarbon particles, which are more likely to turn into dust. Nevertheless, Titan’s equatorial dunes have been active for many hundreds or thousands of years, which suggests that there must be some mechanism at these latitudes that are producing these sand-sized particles continuously.

Scientists have hypothesized the hypothesis that when these particles are carried by wind or a river of methane and they accumulate, they can be converted into sand particles, which are balanced in size, due to friction.

According to the scientists, their model could explain how the seasonal flow of sediments can lead to the formation of sand on Titan. Along with this, the distribution of landscapes on Titan can also be understood with its help.

The scientists say that overall their findings support the hypothesis of global sedimentary pathways on Titan, which are driven by weather. Along with this, the deposition and friction of organic sand particles brought by rivers and winds also play a big role in their formation.

In this regard, Matthew G. A. Laporte, a geologist and research researcher at the Stanford School of Earth, Energy, and Environmental Sciences, says that “Our model creates a unified framework that can help to understand that all these sediment-related How do environments work together?

“So if we solve all parts of this puzzle, we can understand a lot about Titan’s climate or geological history from the landforms left behind by these sedimentary processes. 

Internal Link – scienzlife

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