MTorrice writes “Lithium-sulfur batteries promise to store four to five times as much energy as today’s best lithium-ion batteries. But their short lifetimes have stood in the way of their commercialization. Now researchers demonstrate that a sulfur-based polymer could be the solution for lightweight, inexpensive batteries that store large amounts of energy. Battery electrodes made from the material have one of the highest energy-storage capacities ever reported” Litihium Ion batteries should maintain capacity for about 1000 cycles, whereas Lithium-sulfur batteries traditionally went kaput after about 100. But it looks like they are getting pretty close to something feasible, from the article: “The best performing copolymer consisted of 90% sulfur by mass. Batteries using this copolymer had an initial storage capacity of 1, 225 mAh per gram of material. After 100 charge-discharge cycles, the capacity dropped to 1, 005 mAh/g, and after 500 cycles it fell to about 635 mAh/g. In comparison, a lithium-ion battery typically starts out with a storage capacity of 200 mAh/g but maintains it for the life of the battery, Pyun says.” Read more of this story at Slashdot.
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Sulfur Polymers Could Enable Long-Lasting, High-Capacity Batteries
Researchers at MIT have developed a handheld milling machine that turns anyone into a skilled sculptor. Like with a 3D printer, users start with a 3D model on a computer, but instead of a machine laying down layers of plastic, the handheld mill removes only what’s needed from a solid block of material to eventually reveal a fully formed 3D object. This could basically turn anyone into a Michelangelo when we’re all able to buy one. Read more… 
No matter what you’re doing at a computer, two displays are always better than one, and that could soon be true for your mobile devices as well. Prototypes of dual-display smartphones have already been demonstrated, but researchers have now revealed a wireless second display for your mobile devices that magically sucks the minimal power it requires from a wireless NFC connection. Read more… 
First time accepted submitter CanadianRealist writes “Electrolysis of water to produce hydrogen is very inefficient without the use of a catalyst. Unfortunately catalysts are currently made of crystals containing rare, expensive toxic metals such as ruthenium and iridium. Two chemists from the University of Calgary have invented a process to make a catalyst using relatively non-toxic metal compounds such as iron oxide, for 1/1000 the cost of currently used catalysts. It is suggested this would make it more feasible to use electrolysis of water to create hydrogen as a method of storing energy from variable green power sources such as wind and solar.” Read more of this story at Slashdot.