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Category: energy – Page 207

What is VCSEL Laser (Vertical Cavity Surface Emitting Laser)?

The science behind “quantum dots”

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VCSEL stands for Vertical Cavity Surface Emitting Laser.

VCSEL emits light in a cylindrical beam vertically from the surface of a fabricated wafer, and offers significant advantages when compared to the conventional edge-emitting lasers currently used in the majority of fiber optic communications devices.

Now let’s take a comparison between conventional edge emitting laser and VCSEL laser.

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New flexible supercapacitor could boost the lifespan of wearables

A team of researchers from the University of Surrey’s Advanced Technology Institute (ATI) and the Federal University of Pelotas (UFPel), Brazil, has developed a new type of supercapacitor that can be integrated into footwear or clothing, an advance with applications in wearables and IoT (Internet of Things) devices.

A supercapacitor is an electricity storage device, similar to a battery, but it stores and releases electricity much faster.

The researchers have devised a novel method for the development of flexible supercapacitors based on carbon nanomaterials. The new method, which is cheaper and less time-consuming to fabricate, involves transferring aligned carbon nanotube (CNT) arrays from a silicon wafer to a polydimethylsiloxane (PDMS) matrix. This is then coated in a material called polyaniline (PANI), which stores energy through a mechanism known as pseudocapacitance, offering outstanding energy storage properties with exceptional mechanical integrity.

Energy crisis: British households will be paid to use less electricity under new trial

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Electrostatic engineering gets the lead out for faster batteries

Conventional batteries are a lot like camels. They’re great for storage and transportation, but they’re not exactly speedy.

For technologies that require a fast discharge of energy, such as heart defibrillators, alternative materials are often used; foremost among them, antiferroelectrics.

There is only a handful of known antiferroelectric materials, and most of them contain lead, so they aren’t safe enough for everyday applications. Now, a Cornell-led collaboration has discovered a new approach for making a lead-free antiferroelectric that performs as well as its toxic relatives.

Researchers propose new fix for Texas power vulnerabilities

One year after winter storms crippled Texas’s electricity grid, contributing to more than 200 deaths, a Cornell University-led analysis recommends contracting improvements to reduce decentralized energy markets’ vulnerability to rare events.

Such “energy-only” markets rely on investors to anticipate demand for all conditions and build appropriate resiliency into the system. They allow prices to soar during extreme events to incentivize preparedness.

But in Texas, where Winter Storm Uri caused catastrophic blackouts over five consecutive days of frigid temperatures, the crisis revealed the market’s failure to manage risk as designed, says Jacob Mays, assistant professor in the School of Civil and Environmental Engineering at Cornell. Winterization investment fell short, he said, because the payoff proved too distant and uncertain.

It’s Official. Lucid Air Is the Longest-Range EV Ever

And it doubles up as a backup energy unit and a camper.

Norwegian tech startup Fresco Motors just revealed its new Fresco XL, an electric vehicle (EV) that it claims will have a range of 620 miles (1,000 km). If the claim is true, it would make it the longest-range EV in the world.

Currently, the 2021 Lucid Air is the longest-range EV on the market with its EPA rating of 520 miles (837 km). Mercedes-Benz has announced its partially solar-powered Vision EQXX with a range of 620 miles (1000 km), though that is only in the concept stage.

Fresco Motors was founded in 2019 and was named after the futurist engineer Jacque Fresco. In its new statement, the company announced that the Fresco XL will feature an electric motor on each axle, meaning the all-wheel-drive EV will be off-road capable. The company also said the vehicle will come with a double-stacked extra-large battery pack that solves the range anxiety problem\.

Norwegian tech startup Fresco Motors just revealed its new Fresco XL, an electric vehicle that it claims will have a range of 620 miles.

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North Korea Claims Successfully Testing a New Hypersonic Gliding Warhead

These missiles are too fast to detect. Hypersonic weapons technology is at the heart of a new arms race. Currently, the US, China, and Russia are all competing to develop the most effective long-range hypersonic missiles. A recent report revealed that North Korea has also successfully tested a hypersonic missile on January 5, 2022, the country’s second reported test of a hypersonic missile.

North Korea has also referred to verifying the “fuel ampoule system” during this deployment which means that the liquid fuel used by the missile was sealed at production. This allows for rapid deployment even after the missile has been stored for long periods of time, while also reducing its vulnerability to pre-emptive strikes.

We have now seen what North Korea can do in quite imaginative ways.