Power/Performance Bits: June 20


Batteries from scrap metal Scientists at the Chinese Academy of Sciences and Jilin University found a method to transform rusty stainless steel mesh into electrodes with outstanding electrochemical properties that make them ideal for potassium-ion batteries. The rust is converted directly into a compact layer with a grid structure that can store potassium ions. A coating of reduced graphite... » read more

Power/Performance Bits: June 6


Magnetoelectric RAM A team of researchers from the Institute of Electronics, Microelectronics and Nanotechnology in Lille, France and the Russian Academy of Sciences in Moscow developed a magnetoelectric random access memory (MELRAM) cell that has the potential to increase power efficiency, and thereby decrease heat waste, by orders of magnitude for read operations at room temperature. Th... » read more

Power/Performance Bits: May 30


Flexible nanogenerator acts as loudspeaker, microphone Engineers at Michigan State University developed a paper-thin, flexible ferroelectret nanogenerator, or FENG, that can both generate energy from human motion and act as a loudspeaker and microphone. "This is the first transducer that is ultrathin, flexible, scalable and bidirectional, meaning it can convert mechanical energy to electr... » read more

Power/Performance Bits: May 23


Biosupercapacitor Researchers from UCLA and the University of Connecticut designed a biological supercapacitor, a new biofriendly energy storage system which operates using ions from fluids in the human body. The device is harmless to the body's biological systems, say the researchers, and could lead to longer-lasting cardiac pacemakers and other implantable medical devices. The supercapa... » read more

Power/Performance Bits: May 16


Chaos-based IC Researchers at North Carolina State University and the College of Wooster developed a three transistor nonlinear, chaos-based integrated circuit combining digital and analog components, which they hope can improve computational power by enabling processing of a larger number of inputs. In chaos-based, nonlinear circuits, one circuit can perform multiple computations instead... » read more

Power/Performance Bits: May 9


Integrated battery and solar cell Researchers from the Ulsan National Institute of Science and Technology (UNIST) in Korea developed a single-unit, photo-rechargeable portable power source based on miniaturized crystalline Si photovoltaics (c-Si PVs) and printed solid-state lithium-ion batteries (LIBs). The device uses a thin-film printing technique, in which the solid-state LIB is directly ... » read more

Power/Performance Bits: May 2


Turning bottles into batteries Researchers at the University of California, Riverside used waste glass bottles and a low-cost chemical process to create nanosilicon anodes for high-performance lithium-ion batteries. Billions of glass bottles end up in landfills every year, prompting the researchers to ask whether silicon dioxide in waste beverage bottles could provide high purity silicon ... » read more

Power/Performance Bits: April 25


Thermal diode Engineers at the University of Nebraska-Lincoln developed a nano-thermal-mechanical device, or thermal diode, which uses heat as an alternative energy source that would allow computing at ultra-high temperatures. "If you think about it, whatever you do with electricity you should (also) be able to do with heat, because they are similar in many ways," said Sidy Ndao, assistan... » read more

Power/Performance Bits: April 18


Cooling hotspots Engineers at Duke University and Intel developed a technology to cool hotspots in high-performance electronics. The new technology relies on a vapor chamber made of a super-hydrophobic floor with a sponge-like ceiling. When placed beneath operating electronics, moisture trapped in the ceiling vaporizes beneath emerging hotspots. The vapor escapes toward the floor, taking hea... » read more

Power/Performance Bits: March 21


Tiny redox flow batteries for chips Researchers at ETH Zurich and IBM Research Zurich built a tiny redox flow battery capable of both powering and cooling stacks of chips. In a flow battery, an electrochemical reaction is used to produce electricity out of two liquid electrolytes, which are pumped to the battery cell from outside via a closed electrolyte loop. Such batteries are usually u... » read more

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