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Category: energy – Page 4

Experiments support a controversial proposal to generate electricity from our planet’s rotation by using a device that interacts with Earth’s magnetic field.

“It seems crazy,” says Chris Chyba of Princeton University, talking about the hollow magnetic cylinder he has built to generate electricity using Earth’s magnetic field. The cylinder doesn’t move—at least not in the lab—but it rotates with the planet and is thus dragged through Earth’s magnetic field. “It has a whiff of a perpetual motion machine,” Chyba says, but his calculations show that the harvested energy comes from the planet’s rotational energy. He and his colleagues now report that 18 microvolts (µV) are generated across the cylinder when it is held perpendicular to Earth’s field [1]. Next they have to convince other scientists that the effect is real.

Chyba became interested in electricity generation about a decade ago while studying a possible warming mechanism in moons moving through a planet’s magnetic field. He wondered if a similar effect might occur for objects on Earth’s surface.

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A research team at UNIST has identified the causes of oxygen generation in a novel cathode material called quasi-lithium and proposed a material design principle to address this issue.

Quasi-lithium materials theoretically enable batteries to store 30% to 70% more energy compared to existing technologies through high-voltage charging of over 4.5V. This advancement could allow to achieve a of up to 1,000 km on a single charge. However, during the high-voltage charging process, oxygen trapped inside the material can oxidize and be released as gas, posing a significant explosion risk.

The research team, led by Professor Hyun-Wook Lee in the School of Energy and Chemical Engineering, discovered that oxygen oxidizes near 4.25V, causing partial structural deformation and gas release.

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A trio of physicists from Princeton University, CIT’s Jet Propulsion Laboratory and Spectral Sensor Solutions, all in the U.S., is proposing the possibility of generating electricity using energy from the rotation of the Earth. In their study, published in the journal Physical Review Research, Christopher Chyba, Kevin Hand and Thomas Chyba tested a theory that electricity could be generated from the Earth’s rotation using a special device that interacts with the Earth’s magnetic field.

Over the past decade, members of the team have been toying with the idea of generating electricity using the Earth’s rotation and its magnetic field, and they even published a paper describing the possibility back in 2016. That paper was met with criticism because prior theories have suggested that doing so would be impossible because any created by such a device would be canceled as the electrons rearrange themselves during the generation of an electric field.

The researchers wondered what would happen if this cancelation was prevented and the voltage was instead captured. To find out, they built a special device consisting of a cylinder made of manganese-zinc ferrite, a weak conductor, which served as a magnetic shield. They then oriented the cylinder in a north-south direction set at a 57° angle. That made it perpendicular to both the Earth’s rotational motion and the Earth’s magnetic field.

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Scientists are developing ever-more powerful magnets to enable clean energy sources like fusion. But China’s dominance of the supply chain for rare-earth magnets threatens their global availability.

Bloomberg Primer cuts through the complex jargon to reveal the business behind technologies poised to transform global markets. This six-part, planet-spanning series offers a comprehensive look at the \.

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A recent study evaluating garnet-type solid electrolytes for lithium metal batteries finds that their expected energy density advantages may be overstated. The research reveals that an all-solid-state lithium metal battery (ASSLMB) using lithium lanthanum zirconium oxide (LLZO) would achieve a gravimetric energy density of only 272 Wh/kg, a marginal increase over the 250–270 Wh/kg offered by current lithium-ion batteries.

Given the high production costs and manufacturing challenges associated with LLZO, the findings suggest that composite or quasi-solid-state electrolytes may be more viable alternatives. The work is published in the journal Energy Storage Materials.

“All-solid-state lithium metal batteries have been viewed as the future of energy storage, but our study shows that LLZO-based designs may not provide the expected leap in ,” said Eric Jianfeng Cheng, lead author of the study and researcher at WPI-AIMR, Tohoku University. “Even under ideal conditions, the gains are limited, and the cost and manufacturing challenges are significant.”

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IINA provides ongoing analysis of international affairs both by region—such as North America, China, and Europe—and by such topics as human security, nontraditional security threats, and cyber security. The articles on this site, written by experts at the Sasakawa Peace Foundation and guest contributors, are carefully selected for their objectivity, accuracy, timeliness, and relevance for Japan.

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As the growth in global electricity need and supply continues to accelerate, efficient power electronics will be key to improving grid efficiency, stability, integration, and resilience for all energy sources.

Advances in wide-bandgap materials for semiconductors offer the potential to enable greater power handling in power electronics while reducing electrical and thermal losses. Wide-bandgap materials also allow for smaller, faster, more reliable, and more energy-efficient power electronic components than current commercial silicon-based power .

Researchers from the National Renewable Energy Laboratory (NREL), the Colorado School of Mines, and Oak Ridge National Laboratory examined a potential route to achieve peak performance of aluminum gallium nitride, AlxGa1-x N, a key material for increasing power electronics’ energy efficiency and performance, through growth on optimized substrate materials.

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Researchers have simplified a highly complex quantum imaging technique, 2DES, used to observe ultrafast electron interactions.

By refining an existing interferometer design, they improved control over laser pulses, unlocking new capabilities for studying energy transfer in materials.

Unveiling the ultrafast world of electrons.

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