tag: batteries

Power/Performance Bits: Nov. 25
By Jesse Allen - 25 Nov, 2015 - Comments: 0

Insect robots on the water Taking inspiration from water beetles and other swimming insects, academics at the Bristol Robotics Laboratory have developed the "Row-bot," a robot that thrives in dirty water. The Row-bot mimics the way that one aquatic insect, the water boatman, moves and the way that it feeds on rich organic matter in the dirty water it swims in. The Row-bot project aims to ... » read more

Power/Performance Bits: Nov. 3
By Jesse Allen - 03 Nov, 2015 - Comments: 0

Lithium-air batteries gain ground Scientists at the University of Cambridge have developed a working laboratory demonstration of a lithium-oxygen battery which has very high energy density, is more than 90% efficient, and can be recharged more than 2000 times. Their demonstrator relies on a highly porous, 'fluffy' carbon electrode made from graphene (comprising one-atom-thick sheets of ca... » read more

Power/Performance Bits: Oct. 20
By Jesse Allen - 20 Oct, 2015 - Comments: 0

Memristors come in threes The race is on to produce a commercial memristor, and a duo from ETH Zurich may be providing a bit more push. "Basically, memristors require less energy since they work at lower voltages," explained Jennifer Rupp, professor in the Department of Materials at ETH Zurich. "They can be made much smaller than today's memory modules, and therefore offer much greater de... » read more

Power/Performance Bits: Oct. 6
By Jesse Allen - 06 Oct, 2015 - Comments: 0

Portabella batteries Researchers at the University of California, Riverside created a new type of lithium-ion battery anode using portabella mushrooms, which are inexpensive, environmentally friendly and easy to produce. The current industry standard for rechargeable lithium-ion battery anodes is synthetic graphite, which comes with a high cost of manufacturing because it requires tedious pu... » read more

Power/Performance Bits: Sept. 1
By Jesse Allen - 01 Sep, 2015 - Comments: 0

Growing graphene nanoribbons University of Wisconsin-Madison engineers discovered a way to grow graphene nanoribbons with desirable semiconducting properties directly on a conventional germanium semiconductor wafer. This could allow manufacturers to easily use graphene nanoribbons in hybrid integrated circuits, which promise to significantly boost the performance of next-generation electroni... » read more

Recharging The Battery
By Ernest Worthman - 13 Aug, 2015 - Comments: 0

There are few technologies in today’s cutting-edge technological environment that have a difficult time finding new levels of performance. Battery technology is one of them. With the exception of a few experimental offerings, batteries and their performance metrics are relatively flat. There has been some progress, of course. But when compared to other technologies such as transistors, mem... » read more

Power/Performance Bits: June 30
By Jesse Allen - 30 Jun, 2015 - Comments: 0

Tiny, solar-powered sensors Last week, at the Symposia on VLSI Technology and Circuits, MIT researchers presented a new power converter chip that can harvest more than 80 percent of the energy trickling into it, even at the extremely low power levels characteristic of tiny solar cells. Previous ultralow-power converters that used the same approach had efficiencies of only 40 or 50 percent. ... » read more

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

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