tag: batteries

Power/Performance Bits: June 23
By Jesse Allen - 23 Jun, 2015 - Comments: 0

Printing 3D circuits from wood Researchers at Chalmers created three-dimensional objects made entirely of cellulose for the first time with the help of a 3D-bioprinter. They also added carbon nanotubes to create electrically conductive material. The difficulty using cellulose derived from wood in additive manufacturing is that cellulose does not melt when heated. Therefore, the 3D printer... » read more

Power/Performance Bits: June 16
By Jesse Allen - 16 Jun, 2015 - Comments: 0

Lighting up graphene A team of scientists from Columbia University, Seoul National University, and Korea Research Institute of Standards and Science demonstrated an on-chip visible light source using graphene as a filament. They attached small strips of graphene to metal electrodes, suspended the strips above the substrate, and passed a current through the filaments to cause them to heat up.... » read more

Power/Performance Bits: June 9
By Jesse Allen - 09 Jun, 2015 - Comments: 0

Building foam batteries out of trees A method for making elastic high-capacity batteries from wood pulp was unveiled by researchers in Sweden and the US. Using nanocellulose broken down from tree fibers, a team from KTH Royal Institute of Technology and Stanford University produced an elastic, foam-like battery material that can withstand shock and stress. "It is possible to make incredib... » read more

New Challenges For Wearables
By Ed Sperling - 26 Jan, 2015 - Comments: 1

The earliest recorded mention of a wristwatch dates back to the late 1500s, but it really began gaining adherents in Great Britain’s Boer War campaign as a way of synchronizing military actions beyond the line of sight. Strapping a pocket watch to a horse or a camel simply didn’t work, and pulling it out of a jacket pocket was not only inconvenient, it was dangerous. Advertised as a “c... » read more

Energy Harvesting Makes Progress
By Ed Sperling - 04 Dec, 2014 - Comments: 0

The dream of a self-powered device has been around for a long time—thousands of years, in fact. The first windmills and waterwheels date back to ancient Greece and the beginning of recorded history. Self-winding timepieces date back to the late 1700s. The Foucault pendulum has been in motion in Paris, minus some brief hiatuses, since 1851. And it's been 144 years since two French physicists d... » read more

Power/Performance Bits: Dec. 10
By Brian Bailey - 10 Dec, 2013 - Comments: 0

Optical Metamaterial with a Refractive Index of Zero Most of the time we hear about the need for coherent light sources, such as those produced by lasers, but there may be equal promise looking in the other direction. Quantum processors promise to be many times faster and more powerful than today’s supercomputers, but to get to that point they will need fast and efficient multi-directiona... » read more

System Bits: Nov. 12
By Brian Bailey - 12 Nov, 2013 - Comments: 0

3D Printers When thinking about 3D printers, most people probably think about creating small plastic parts or prototypes. 3D printing now can be used to print lithium-ion microbatteries the size of a grain of sand. The printed microbatteries could supply electricity to tiny devices in fields from medicine to communications, including many that have lingered on lab benches for lack of a batt... » read more

Picture Perfect
By Ed Sperling - 08 Mar, 2012 - Comments: 0

For the past five years power/energy efficiency has been a growing concern in the IC world, as well as in the OEM world that has to compete based on battery life. The days when you could plug a phone into the wall at night and be assured you could use it for three days or more without worrying about finding another plug ended with the advent of great displays and more functionality. Since th... » read more

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