600 kilowatts? This inverter knows how to keep its cool!

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Engineering

“600 Kilowatt Inverter: Innovative Design Stays Cool Under Load”

Power inverters are the beating heart in the drive train of modern electric cars. They turn the electrical energy from the batteries into something that engines can actually use. Fraunhofer IZM has now redefined what this key component is possible of doing: Using the newest developments in power electronics, the „Dauerpower“ inverter was born that can handle enormous amounts of power with low inductance and in a tiny body – with peak efficiency measured at 98.7%. Let’s roll! Modern electric…

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Texas Engineer Arumugam Manthiram in his lab with students. Image Credit: The University of Texas at Austin
Automotive Engineering

Safer High-Energy Electric Vehicle Batteries Unveiled

Nickel’s role in the future of electric vehicle batteries is clear: It’s more abundant and easier to obtain than widely used cobalt, and its higher energy density means longer driving distances between charges. However, nickel is less stable than other materials with respect to cycle life, thermal stability, and safety. Researchers from The University of Texas at Austin and Argonne National Laboratory aim to change that with a new study that dives deep into nickel-based cathodes, one of the two…

The study includes the manufacturing process of super-invar alloy of WAAM, the relationship between micro-structure and G/R, the mechanical properties and the CTE. The main transfer mode of liquid droplets during the manufacturing process is liquid bridge transition. According to the thermal simulation results, the formation of the columnar cellular micro-structure is associated with the value of G/R. The mechanical properties of super-invar alloy exhibit anisotropy, the longitudinal specimens have better mechanical properties. The coefficient of thermal expansion of super-invar alloy was measured to be 0.265×10-6K-1from 20 ℃ to 100 ℃. Image Credit: Shuijun Ye, Lindong Xu, Yueling Guo, Xinglong Di, Qifei Han, Yuanxuan Zheng, Xingchen Li.
Process Engineering

Exploring Super-Invar Alloy’s Mechanical Properties and Microstructure

Researchers have manufactured Super-invar Fe64-Ni32-Co4 (wt %) alloy through wire-arc additive manufacturing(WAAM), revealing the association between the micro-structure and the value of the G (the temperature gradient)/R (the solidification rate) during the deposition process, and achieving the coefficient of thermal expansion (CTE) of 0.265×10-6K-1 from 20℃ to 100℃. Published in Advanced manufacturing, the findings provide a reference for the fast fabrication of super-invar alloy components through WAAM, which promotes the applications of super-invar alloy in aerospace. Super-invar alloy, distinguished by…

A new paper from the lab of Asst. Prof. Chibueze Amanchukwu (left) of the UChicago Pritzker School of Molecular Engineering, including first author Priyadarshini Mirmira (right), demonstrates a new technique for building inorganic and polymer electrolytes at the same time and in the same vessel. (Photo by John Zich). Image Credit: UChicago Pritzker School of Molecular Engineering / John Zich
Materials Sciences

New One-Pot Technique Enhances Material Synthesis Efficiency

UChicago Pritzker School of Molecular Engineering research created inorganic and polymer battery electrolytes simultaneously, with potential applications across chemistry Creating battery electrolytes – the component that carries the charged particles back and forth between a battery’s two terminals – has always been a tradeoff. Solid-state inorganic electrolytes move the particles extremely efficiently, but being solid and inorganic means they’re also brittle, hard to work with and difficult to connect seamlessly with the terminals. Polymer electrolytes are a dream to work…

Singapore's skyline at sunset. Image Credit by Javanng, Envato
Architecture & Construction

Seismic Study in Singapore: Insights for Urban Construction and Energy

A new seismic study of Singapore could guide urban growth and renewable energy development in the coastal city nation, where 5.6 million residents live within an area of 734 square kilometers. The study, published in Seismological Research Letters, identifies areas with increased risk of ground shaking and a possible reservoir for geothermal energy production, as well as a glimpse at Singapore’s tectonic history. Jiayuan Yao of China University for Geosciences and colleagues analyzed teleseismic data captured by a few permanent…

The lowest energy and the dynamical unstable configurations, as well as their corresponding phonon dispersion relationships. Image Credit: WANG XIanlong
Materials Sciences

Phosphorus Doping Enhances Stability of Polymer Nitrogen

Using first-principles calculations, a research group led by Prof. WANG Xianlong from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences, found that phosphorus doping is an effective way to achieve high-energy polymeric nitrogen with black-phosphorus structure (BP-N) stable at ambient pressure. The research results were published in Matter and Radiation at Extremes. Cubic gauche nitrogen with diamond-like structure and BP-N with black phosphorus structure, represented by polymeric all-nitrogen materials, are a class of high-energy density materials composed…

Abstract Image. Credit: DICP
Power and Electrical Engineering

Boosting Energy Density: New High-Water-Soluble Pyrene Tetraone

Aqueous organic flow batteries (AOFBs) hold promise for renewable energy integration and electricity grid storage due to their inherent safety, as well as the availability of naturally abundant and synthetically tunable organic redox-active molecules (ORAMs). However, challenges such as low energy density, poor stability at high concentrations, and high synthesis costs hinder their commercial viability. Developing ORAMs that offer both high energy density and ultra-stable cycling performance is essential for advancing stationary energy storage solutions. Increasing the number of electron…

Precisely tailored Zn1−xCdxSe/ZnSe shells with a continuous gradient structure were synthesized using the facile high-temperature successive ion layer adsorption and reaction (HT-SILAR) strategy. This process enables the formation of large-particle alloyed red CdZnSe/Zn1−xCdxSe/ZnSe/ZnS/CdZnS QDs. The obtained QDs exhibit an ultra-narrow FWHM of 17.1 nm and a near-unity PLQY, resulting in a record EQE of 38.2% and an exceptional T95 lifetime of over 21,000 hours (tested at 1000 cd m–2) for red QLEDs.
Materials Sciences

Quantum Dot Technology: Enhanced Color and Longevity in Displays

Quantum dot light-emitting diodes (QLEDs) have made rapid progress in luminescence, efficiency, and stability, making them promising candidates for displays and solid-state lighting applications. However, achieving high-performance QLEDs with high color purity remains a persistent challenge, particularly red QLEDs, thus limiting the popularity of ultra-high definition devices. Recently, Soochow University, in collaboration with Macau University of Science and Technology and other research institutes, reported a facile high-temperature successive ion layer adsorption and reaction (HT-SILAR) strategy for the growth of high-quality,…

Power and Electrical Engineering

Student Solves Century-Old Math Problem, Boosting Wind Energy

A Penn State engineering student refined a century-old math problem into a simpler, more elegant form, making it easier to use and explore. Divya Tyagi’s work expands research in aerodynamics, unlocking new possibilities in wind turbine design that Hermann Glauert, a British aerodynamicist and the original author, did not consider. Tyagi, a graduate student pursuing her master’s degree in aerospace engineering, completed this work as a Penn State undergraduate for her Schreyer Honors College thesis. Her research was published in Wind Energy Science….

Combining ultra-thin molybdenum disulfide with flexible strontium titanate nanomembranes creates advanced materials that can be used in a variety of low-power, high-performance electronic and sensing devices. Image Credit: Jennifer M. McCann/Penn State
Materials Sciences

Inception of Low-Power Electronics with New Material Property

Scientists at Penn State have harnessed a unique property called incipient ferroelectricity to create a new type of computer memory that could revolutionize how electronic devices work, such as using much less energy and operating in extreme environments like outer space. They published their work, which focuses on multifunctional two-dimensional field-effect transistors (FETs), in Nature Communications. FETs are advanced electronic devices that use ultra-thin layers of materials to control electrical signals, offering multiple functions like switching, sensing or memory in a…

Female mechanic inspecting car engine with laptop in workshop by Unai82
Automotive Engineering

Curtin’s Water-Repellent Glass: A New Era in Innovation

Curtin University researchers have developed a new technique to make glass water-repellent, a feature that could improve safety in vehicles, reduce cleaning costs for buildings and enhance filtration systems. The research, published in the prestigious journal Advanced Functional Materials, shows how an innovative and non-toxic process using ultrasonic sound waves can alter the surface of glass, making it either hydrophobic (water resistant) or electrically charged. Lead researcher Associate Professor Nadim Darwish, an ARC Future Fellow at Curtin’s School of Molecular…

New archaeological evidence suggests that ancient inhabitants of the Philippines and Island Southeast Asia had the advanced plant-working technology needed for sophisticated boat building and open-sea fishing. Image Credit: Alfred Pawlik
Materials Sciences

Ancient Technology Clues Discovered in Southeast Asia

The ancient peoples of the Philippines and of Island Southeast Asia (ISEA) may have built sophisticated boats and mastered seafaring tens of thousands of years ago—millennia before Magellan, Zheng He, and even the Polynesians. In a new paper coming out in the April 2025 issue of the Journal of Archaeological Science: Reports, Ateneo de Manila University researchers Riczar Fuentes and Alfred Pawlik challenge the widely-held contention that technological progress during the Paleolithic only emerged in Europe and Africa. They point…

Geothermal pumping station off the road by wirestock, Envato
Power and Electrical Engineering

Exploring Geothermal Energy’s Role in Clean Power Future

Electricity generated using natural underground heat could become cost competitive with power from the grid by 2027 using enhanced geothermal systems, although care is still needed to address earthquake risks, researchers found Historically, access to geothermal energy has hinged on real estate’s famously three most important factors: location, location, and location. Because conventional geothermal power plants require hot, permeable rocks and plenty of underground fluid, use of the technology has been limited mostly to places with recent volcanism, such as Japan,…

Lightning over city. Panoramic dramatic view. Thunderstorm and dark storm clouds over buildings. by Statuska
Architecture & Construction

Hurricane-Proofed Skyscrapers: Vulnerability to Bouncing Winds

Design to withstand hurricanes isn’t enough to protect tall buildings and facade systems against the climate crisis Houston, we have a problem. The ‘Space City’ boasts 50 buildings over 150 meters tall. These were designed to withstand hurricanes, to which Texas is prone. But on May 16th, 2024, a derecho – a wide, long-lived windstorm associated with rapidly moving showers or thunderstorms – managed to cause unexpected damage to many of the tall buildings downtown. The socio-economic impact was significant, due…

Scientist wearing protective uniform and glove under working water analysis and water quality by get waste water to check case in laboratory is environment pollution problem concept
Materials Sciences

Innovative Data-Driven Single-Atom Catalysts for Water Purification

All humans need clean water to live. However, purifying water can be energy-intensive, so there is great interest in improving this process. Researchers at Tohoku University have reported a strategy using data-driven predictions coupled with precise synthesis to accelerate the development of single-atom catalysts (SACs) for more robust and efficient water purification. SACs are one of the most crucial catalysts. They play a pivotal role in enhancing efficiency in diverse applications including chemical industries, energy conversion, and environmental processes. For…

A solar power farm. Image Credit: Tom Fisk
Power and Electrical Engineering

Machine Learning Enhances Solar Power Forecast Accuracy

As solar energy plays an increasing role in the global power supply, ensuring accurate forecasts of photovoltaic (PV) power generation is critical for balancing energy demand and supply. A new study published in Advances in Atmospheric Sciences explores how machine learning and statistical techniques can refine these forecasts by correcting errors in weather models. Weather forecasts are a key input for PV power prediction models, yet they often contain systematic errors that impact accuracy. Researchers from the Institute of Statistics…

Particulate matter emissions can come from tire and brake abrasion. Image Credit: Photo by Jacob Levin for Virginia Tech.
Automotive Engineering

Driving the Charge: Researchers Pioneering Zero Emissions

The research reported findings that indicate electric vehicles generally produce less non-exhaust emissions  No exhaust means no emissions, right? Not quite. It is commonly known that while electric vehicles do not produce tailpipe greenhouse gas emissions while driving, they do create debris from tire and brake abrasion. However, the degree to which they do and how that compares to internal combustion engine vehicles was largely unknown until the Virginia Tech Transportation Institute’s Hesham Rakha investigated it. In an article published…

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