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Sealing paper packaging without adhesives Since plastic packaging accounts for a large fraction of plastic waste, the demand for environmentally friendly packaging options is increasing. One material that is becoming more and more popular as a sustainable alternative to plastic is paper. However, the problem is that sealing paper packaging requires additives such as adhesives…

‘Milestone’ findings on imaging methods call for a closer look at battery microscopy Transmission electron microscopes (TEMs) allow researchers at the forefront of energy technology to study next-generation battery materials down to the atom. But new research has discovered that the very act of microscoping damages both lithium and sodium battery samples more severely than…

A clear view to better batteries: Engineers show moment lithium-ion batteries begin to fail Lithium-ion batteries are ubiquitous in consumer electronics such as cellphones and in electric vehicles, but the surrounding temperature and speed of charging affect those batteries’ performance, safety and lifespan. Fast charging adds convenience, but it further stresses battery life as it…

3D-printed ‘ghost guns’ are not as untraceable as criminals think—new study 3D-printed guns are a growing threat to public safety. The blueprints used to make these firearms can be found online, making them easily accessible. With a relatively cheap 3D printer and a quick web search, anyone could print their own unlicensed gun. Go to…

How an overlooked electrostatic force could drive the motor of the future When we hear about moving objects with electricity, most of us imagine a “pulling force.” Positive and negative charges attract each other, drawing objects together. It is natural to think that this attractive force—known as electrostatic force—is what makes things move. Go to…

A more durable direct air capture approach: Electrified mineral-based system resists oxygen and humidity Many governments and businesses worldwide have been trying to devise effective initiatives aimed at mitigating climate change and global warming. So far, their primary focus has been to reduce the emission of carbon dioxide (CO2), methane (CH4) and other greenhouse gases,…

New systems measures full magnetization hysteresis at MHz frequencies and high magnetic fields High-frequency magnetic characteristics are essential for improving the efficiency, miniaturization, and operating frequency of power conversion devices such as power supply circuits, inductors, and transformers. However, conventional measurement methods face two major challenges. First, generating sufficiently large magnetic fields at high frequencies…

HFC electrolyte delivers energy-dense lithium battery that keeps running at −50 °C A research team in China has developed an electrolyte using monofluorinated hydrofluorocarbon (HFC) solvents capable of achieving energy densities higher than 700 Wh kg−1 at room temperature and about 400 Wh kg−1 at −50 °C, a significant improvement over current technologies. Their work, recently published in Nature, has potential…