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Fast-Charging Batteries Have 20-Year Lifespan

Scientists at Nanyang Technology University (NTU) have developed ultra-fast charging batteries that can be recharged up to 70 percent in only two minutes. The new-generation batteries also have a long lifespan of over 20 years, more than 10 times compared to existing lithium-ion batteries.In the new NTU-developed battery, the traditional graphite used for the anode (negative pole) in lithium-ion batteries is replaced with a new gel material made from titanium dioxide. Titanium dioxide is an abundant, cheap and safe material found in soil. Naturally found in spherical shape, the NTU team has found a way to transform the titanium dioxide into tiny nanotubes, which is a thousand times thinner than the diameter of a human hair. The development speeds up the chemical reactions taking place in the new battery, allowing for superfast charging.  The breakthrough has a wide-ranging impact on all industries, especially for electric vehicles, where consumers are put off by the long recharge times and its limited battery life.SourceAlso: Learn about a Screening Technique for New Battery Chemistries.

Posted in: Batteries, Electronics & Computers, Power Management, Green Design & Manufacturing, Materials, Transportation, Automotive, Nanotechnology, News

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Imaging System Obtains More Color Information than Human Eye

Researchers at the University of Granada have designed a new imaging system capable of obtaining up to twelve times more color information than the human eye and conventional cameras, which implies a total of 36 color channels. The important scientific development will facilitate the easy capture of multispectral images in real time.The technology could be used in the not-too-distant future to create new assisted vehicle driving systems, to identify counterfeit bills and documents, or to obtain more accurate medical images than those provided by current options.The scientists, from the Color Imaging Lab group at the Optics Department, University of Granada, have designed the new system using a new generation of sensors, in combination with a matrix of multispectral filters to improve their performance.Transverse Field Detectors (TFDs) extract the full color information from each pixel in the image without the need for a layer of color filter on them.In order to do so, the TFDs take advantage of a physical phenomenon by virtue of which each photon penetrates at a different depth depending on its wavelength, i.e., its color. In this way, by collecting these photons at different depths on the silice surface of the sensor, the different channels of color can be separated.SourceAlso: Learn about Imaging Space System Architectures.

Posted in: Cameras, Imaging, Sensors, Detectors, Medical, News, Automotive

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Robots Restore Electricity After Power Outages

A team led by Nina Mahmoudian of Michigan Technological University has developed a tabletop model of a robot team that can bring power to places that need it the most.“If we can regain power in communication towers, then we can find the people we need to rescue,” says Mahmoudian, an assistant professor of mechanical engineering–engineering mechanics. “And the human rescuers can communicate with each other.”Unfortunately, cell towers are often located in hard-to-reach places, she says. “If we could deploy robots there, that would be the first step toward recovery.”The team has programmed robots to restore power in small electrical networks, linking up power cords and batteries to light a little lamp or set a flag to waving with a small electrical motor. The robots operate independently, choosing the shortest path and avoiding obstacles, just as you would want them to if they were hooking up an emergency power source to a cell tower.“Our robots can carry batteries, or possibly a photovoltaic system or a generator,” Mahmoudian said. The team is also working with Wayne Weaver, the Dave House Associate Professor of Electrical Engineering, to incorporate a power converter, since different systems and countries have different electrical requirements. SourceAlso: Learn about Locomotion of Amorphous Surface Robots.

Posted in: Batteries, Electronics & Computers, Power Management, Energy Storage, Solar Power, Energy, Communications, Wireless, Machinery & Automation, Robotics, News

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Underwater Robot Skims for Port Security

MIT researchers unveiled an oval-shaped submersible robot, a little smaller than a football, with a flattened panel on one side that it can slide along an underwater surface to perform ultrasound scans.Originally designed to look for cracks in nuclear reactors’ water tanks, the robot could also inspect ships for the false hulls and propeller shafts that smugglers frequently use to hide contraband. Because of its small size and unique propulsion mechanism — which leaves no visible wake — the robots could, in theory, be concealed in clumps of algae or other camouflage. Fleets of them could swarm over ships at port without alerting smugglers and giving them the chance to jettison their cargo.Sampriti Bhattacharyya, a graduate student in mechanical engineering, built the main structural components of the robot using a 3-D printer. Half of the robot — the half with the flattened panel — is waterproof and houses the electronics. The other half is permeable and houses the propulsion system, which consists of six pumps that expel water through rubber tubes.Two of those tubes vent on the side of the robot opposite the flattened panel, so they can keep it pressed against whatever surface the robot is inspecting. The other four tubes vent in pairs at opposite ends of the robot’s long axis and control its locomotion.SourceAlso: Learn about Underwater Localization for Transit and Reconnaissance Autonomy.

Posted in: Imaging, Manufacturing & Prototyping, Rapid Prototyping & Tooling, Motion Control, Power Transmission, Machinery & Automation, Robotics, News

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'Solar Battery' Runs on Light and Air

Ohio State University researchers report that they have succeeded in combining a battery and a solar cell into one hybrid device.Key to the innovation is a mesh solar panel, which allows air to enter the battery, and a special process for transferring electrons between the solar panel and the battery electrode. Inside the device, light and oxygen enable different parts of the chemical reactions that charge the battery.The university will license the solar battery to industry, where Yiying Wu, professor of chemistry and biochemistry at Ohio State, says it will help tame the costs of renewable energy.“The state of the art is to use a solar panel to capture the light, and then use a cheap battery to store the energy,” Wu said. “We’ve integrated both functions into one device. Any time you can do that, you reduce cost.”During charging, light hits the mesh solar panel and creates electrons. Inside the battery, electrons are involved in the chemical decomposition of lithium peroxide into lithium ions and oxygen. The oxygen is released into the air, and the lithium ions are stored in the battery as lithium metal after capturing the electrons.When the battery discharges, it chemically consumes oxygen from the air to re-form the lithium peroxide. An iodide additive in the electrolyte acts as a “shuttle” that carries electrons, and transports them between the battery electrode and the mesh solar panel. The use of the additive represents a distinct approach on improving the battery performance and efficiency, the team said. The invention eliminates the loss of electricity that normally occurs when electrons have to travel between a solar cell and an external battery.SourceAlso: Learn about Full-Cell Evaluation for New Battery Chemistries.

Posted in: Batteries, Electronics & Computers, Electronic Components, Power Management, Energy Storage, Solar Power, Renewable Energy, Energy, Semiconductors & ICs, News

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Army Researchers Enable Night Lethality

In science fiction, technology problems are solved with the stroke of a writer's pen. In reality, science and technology research takes time, and a lot of effort.

Posted in: News

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New DARPA Technologies Could Make Cyber Warfare a Reality

Three years after the Defense Department named cyberspace a new domain of warfare, the Defense Advanced Research Projects Agency is unveiling technologies that could soon make it possible for military leaders and warriors to plan and execute real-time cyber missions in a territory charted so far only by machines.

Posted in: News

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