Archive for the ‘energy’ category: Page 9

Apr 26, 2023

Vast Potential — Researchers Create a New Type of Laser

Posted by in categories: energy, materials

Researchers from EPFL and IBM have created a novel laser that could revolutionize optical ranging technology. This laser is constructed from lithium niobate, a material frequently utilized in optical modulators to regulate the frequency or intensity of light transmitted through a device.

Lithium niobate is highly valued for its ability to manage large amounts of optical power and its high “Pockels coefficient.” This allows the material to alter its optical properties when an electric field is applied to it.

The researchers achieved their breakthrough by combining lithium niobate with silicon nitride, which allowed them to produce a new type of hybrid integrated tunable laser. To do this, the team manufactured integrated circuits for light (“photonic integrated circuits”) based on silicon nitride at EPFL, and then bonded them with lithium niobate wafers at IBM.

Apr 25, 2023

Two massive gravity batteries are nearing completion in the US and China

Posted by in categories: energy, sustainability

The system helps to plug the gap when it comes to renewable energy sources.

As a solution to the unpredictable nature of renewable energy sources like solar and wind power, gravity batteries are being pitched as an ideal remedy. To further this cause, Swiss startup Energy Vault is now completing two such units, which are situated near Shanghai in China and Texas in the United States.

The basic idea behind a gravity battery system is to lift a heavy object, such as a large mass of concrete or a weight, on a pulley, using energy from a power source. When energy is needed, the thing can fall, and the potential energy is converted back into electricity.

Apr 24, 2023

A new wake-up receiver could help preserve the battery life of tiny sensors

Posted by in categories: electronics, energy

Scientists demonstrate a low-power “wake-up” receiver one-tenth the size of other devices.

Apr 24, 2023

The Kardashev Scale

Posted by in categories: energy, physics, space

The kardeshev scale of possible future technological advance.

In 1964, Russian astrophysicist Nikolai Kardashev figured that civilizations can be categorized by the total amount of energy available to them. He called it the Kardashev Scale. He initially came up with 3 civilization types; type 1, type 2, and type 3. However, other astronomers have recently extended the scale from type 0 all the way to type 7 as new theories in modern physics have emerged. Check out the complete playlist as we unveil each level of the Kardashev Scale! Enjoy the videos, and do let us know your thoughts in the comments!

Apr 23, 2023

Researchers fabricate mechanical metamaterials with ultra-high energy absorption capacity

Posted by in categories: energy, physics

Chinese researchers have successfully fabricated mechanical metamaterials with ultra-high energy absorption capacity using ion track technology. The results were published in Nature Communications as an Editor’s Highlight.

The study was conducted by the researchers from the Materials Research Center of the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) and their collaborators from Chongqing University.

Mechanical metamaterials refer to a class of composite materials with artificially designed structures, which exhibit extraordinary mechanical properties that traditional materials do not have. Among them, energy absorption can absorb more efficiently, which requires the material itself to equip both and high strain capacity, which, however, hardly co-exist in general.

Apr 23, 2023

Researchers in Japan develop a new ultra-high-density sulfonic acid polymer electrolyte membrane for fuel cells

Posted by in categories: energy, transportation

In a project commissioned by the New Energy and Industrial Technology Development Organization (NEDO), researchers at Nagoya University in Japan have developed poly(styrenesulfonic acid)-based PEMs with a high density of sulfonic acid groups.

One of the key components of environmentally friendly polymer electrolyte fuel cells is a (PEM). It generates through a reaction between hydrogen and oxygen gases. Examples of practical fuel cells include fuel cell vehicles (FCVs) and combined heat and power (CHP) systems.

The best-known PEM is a membrane based on a perfluorosulfonic acid polymer, such as Nafion, which was developed by DuPont in the 1960s. It has a good proton conductivity of 0.1 S/cm at 70–90 °C under humidified conditions. Under these conditions, protons can be released from sulfonic acid groups.

Apr 21, 2023

Researchers synthesize graphene using intense light

Posted by in categories: energy, nanotechnology

DGIST Professor Yoonkyu Lee’s research team used intense light on the surface of a copper wire to synthesize graphene, thereby increasing the production rate and lowering the production cost of the high-quality transparent-flexible electrode materials and consequently enabling its mass production. The results were published in the February 23 issue of Nano Energy.

This technology is applicable to various 2D materials, and its applicability can be extended to the synthesis of various metal-2D material nanowires.

The research team used copper-graphene nanowires to implement high-performance transparent-flexible electronic devices such as transparent-flexible electrodes, transparent supercapacitors and transparent heaters and to thereby demonstrate the commercial viability of this material.

Apr 20, 2023

Scientists engineer the first light-powered yeast

Posted by in category: energy

Experiments show ease by which organisms can evolve the ability to harness sunlight for energy.

Apr 19, 2023

‘Condensed battery’ could power aircraft

Posted by in categories: energy, transportation

The energy per unit mass of 500 Wh/kg is twice that of typical Li-ion batteries. In addition to doubling the range of EVs, this could enable longer-haul electrified aviation.

Contemporary Amperex Technology Co., Limited (CATL) has today launched a new ‘condensed battery’ with up to 500 Wh/kg. This ultra-high energy density could enable the electrification of passenger aircraft.

Apr 18, 2023

How to create an artificial magnetosphere for Mars

Posted by in categories: energy, engineering, environmental, space

Year 2023 face_with_colon_three

If humanity is ever to consider substantial, long-term colonization of Mars, the resources needed are going to be extensive. For a long-term human presence on Mars to be established, serious thought would need to be given to terraforming the planet. One major requirement for such terraforming is having the protection of a planetary magnetic field — which Mars currently does not have. The Earth’s magnetosphere helps protect the planet from the potential sterilizing effects of cosmic rays and also helps retain the atmosphere, which would otherwise by stripped by large solar storms as they pass over the planet. Mars does have small patches of remnant surface magnetic field, but these are localized in the southern hemisphere and are not of sufficient size or magnitude to protect the planet or a colony.

In this article we explore comprehensively for the first time, the practical and engineering challenges that affect the feasibility of creating an artificial magnetic field capable of encompassing Mars. This includes the concerns that define the design, where to locate the magnetic field generator and possible construction strategies. The rationale here is not to justify the need for a planetary magnetosphere but to put figures on the practicalities so as to be able to weigh the pros and cons of the different engineering approaches.

Continue reading “How to create an artificial magnetosphere for Mars” »

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