LiMnO₂ Electrodes could Replace Ni/Co in Electric Vehicle Batteries

Li-ion batteries show promise as cheap and sustainable alternative to Ni/Co materials
Nanostructured LiMnO2 with domain structures and larger surface area delivers large reversible capacity with good capacity retention with excellent charge rate-capability, which is an essential character for electric vehicle applications. Credit: Yokohama National University

Lithium-ion (or Li-ion) batteries are heavy hitters when it comes to the world of rechargeable batteries. As electric vehicles become more common in the world, a high-energy, low-cost battery utilizing the abundance of manganese (Mn) can be a sustainable option to become commercially available and utilized in the automobile industry.

Currently, batteries used for powering electric vehicles (EVs) are nickel (Ni) and cobalt (Co)-based, which can be expensive and unsustainable for a society with a growing desire f...

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Professor Proposes how a Black Hole in Orbit Around a Planet could be a Sign of an Advanced Civilization

New study proposes how a black hole in orbit around a planet could be a sign of an advanced civilization
Ray traced shadow of a spinning and charged black hole. Credit: Simon Tyran, CC BY-SA 4.0

In 1971, English mathematical physicist and Nobel-prize winner Roger Penrose proposed how energy could be extracted from a rotating black hole. He argued that this could be done by building a harness around the black hole’s accretion disk, where infalling matter is accelerated to close to the speed of light, triggering the release of energy in multiple wavelengths.

Since then, multiple researchers have suggested that advanced civilizations could use this method (the Penrose Process) to power their civilization and that this represents a technosignature we should be on the lookout for.

Examples include John M...

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Researchers Propose a Smaller, more Noise-Tolerant Quantum Circuit for Cryptography

algorithm
Credit: Pixabay/CC0 Public Domain

The most recent email you sent was likely encrypted using a tried-and-true method that relies on the idea that even the fastest computer would be unable to efficiently break a gigantic number into factors.

Quantum computers, on the other hand, promise to rapidly crack complex cryptographic systems that a classical computer might never be able to unravel. This promise is based on a quantum factoring algorithm proposed in 1994 by Peter Shor, who is now a professor at MIT.

But while researchers have taken great strides in the last 30 years, scientists have yet to build a quantum computer powerful enough to run Shor’s algorithm.

As some researchers work to build larger quantum computers, others have been trying to improve Shor’s algorithm so it co...

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The Moon was once covered by an Ocean of Molten Rock, data from India’s Space Mission suggests

The similarity in composition of new and old lunar samples suggests a magma ocean covered the Moon early in its history. Nasa/Goddard Space Flight Center

Data from India’s recent Chandrayaan-3 mission supports the idea that an ocean of molten rock once covered the moon. Scientists from the mission have published their new findings in the journal Nature.

On August 23, 2023, a lander called Vikram successfully touched down on the lunar surface. Controllers then deployed a rover called Pragyan, which had been stowed on Vikram, to explore the landing site.

The location where Vikram touched down was further south than any other landing craft had previously been on the moon. It gave scientists an insight into the geology of the moon that had not yet been sampled.

Pragyan’s measurem...

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