Best of week 39 / 2022

Charging cars at home at night is not the way to go, study finds

The vast majority of electric vehicle owners charge their cars at home in the evening or overnight. We're doing it wrong, according to a new Stanford study.

Researchers develop a cobalt-free cathode for lithium-ion batteries

Researchers at the University of California, Irvine and four national laboratories have devised a way to make lithium-ion battery cathodes without using cobalt, a mineral plagued by price volatility and geopolitical complications.

Lithium-ion battery material breaks barrier on fast charging

Researchers at the Department of Energy's Oak Ridge National Laboratory and the University of Tennessee, Knoxville, discovered a key material needed for fast-charging lithium-ion batteries. The commercially relevant approach opens a potential pathway to improve charging speeds for electric vehicles.

A new way to make electricity using ocean waves

A team of researchers at the Chinese Academy of Sciences has developed a new way to generate electricity using ocean waves. In their paper published in the journal One Earth, the group describes how their new device works and how well it compared to other wave power devices.

Solvent study solves solar cell durability puzzle

Rice University engineers say they've solved a long-standing conundrum in making stable, efficient solar panels out of halide perovskites.

Machine learning generates 3D model from 2D pictures

Researchers from the McKelvey School of Engineering at Washington University in St. Louis have developed a machine learning algorithm that can create a continuous 3D model of cells from a partial set of 2D images that were taken using the same standard microscopy tools found in many labs today.

Tiny soft robot can split into tinier bits then reassemble after passage through small spaces

A team of researchers at Soochow University, working with two colleagues from the Max Planck Institute for Intelligent Systems and another from Harbin Institute of Technology has developed a type of soft robot that can be split into tinier components to pass through small spaces and then reassemble. In their paper published in the journal Science Advances, the group describes how they made their tiny robots and suggest possible uses for them.

Engineers develop high-performance and high-reliability artificial synaptic semiconductor device

Neuromorphic computing system technology mimicking the human brain must overcome the limitation of excessive power consumption, which is characteristic of the existing von Neumann computing method. A high-performance, analog artificial synapse device capable of expressing synapse connection strength is required to implement a semiconductor device that uses a brain information transmission method. This method uses signals transmitted between neurons when a neuron generates a spike signal.

3D-printing drones work like bees to build and repair structures while flying

The technology, which has been tested in the lab, could ultimately be used for manufacturing and building in difficult-to-access or dangerous locations such as tall buildings or help with post-disaster relief construction, say the researchers.

Researchers uncover how to 3D-print one of the strongest stainless steels

For airliners, cargo ships, nuclear power plants and other critical technologies, strength and durability are essential. This is why many contain a remarkably strong and corrosion-resistant alloy called 17-4 precipitation hardening (PH) stainless steel. Now, for the first time ever, 17-4 PH steel can be consistently 3D-printed while retaining its favorable characteristics.