Tag: Batteries

ScienceDaily (May 25, 2010) Researchers at the University of Leeds have uncovered new clues to the origins of life on Earth.

The team found that a compound known as pyrophosphite may have been an important energy source for primitive lifeforms.

There are several conflicting theories of how life on Earth emerged from inanimate matter billions of years ago -- a process known as abiogenesis.

Rechargeable zinc-air batteries can store three times the energy of a lithium-ion battery.

A Swiss company says it has developed rechargeable zinc-air batteries that can store three times the energy of lithium ion batteries, by volume, while costing only half as much. ReVolt, of Staefa, Switzerland, plans to sell small "button cell" batteries for hearing aids starting next year and to incorporate its technology into ever larger batteries, introducing cell-phone and electric bicycle batteries in the next few years. It is also starting to develop large-format batteries for electric vehicles.

Silicon-nanotube electrodes may enable lithium-ion batteries to store 10 times more charge.


In an advance that could help electric vehicles run longer between charges, researchers have shown that silicon nanotube electrodes can store 10 times more charge than the conventional graphite electrodes used in lithium-ion batteries.

Batteries­ are pr­actically essential devices but present a whole ho­st of problems. Over time they can have trouble retaining a charge. Some stop working altogether. Others overheat or leak or even explode. They're also rigid and sometimes bulky. Then how about, instead of your standard AA or lithium-ion, a flexible, incredibly thin battery that could be powered by blood or sweat? Seems like an improvement, right?

Ba­tteries are all over the place -- in our cars, our PCs, laptops, portable MP3 players and cell phones. A battery is essentially a can full of chemicals that produce electrons. Chemical reactions that produce electrons are called electrochemical reactions. In this article, you'll learn all about batteries -- the basic concept at work, the actual chemistry going on inside a battery, rechargeable versions, what the future holds for batteries and possible power sources that could replace them.

The disposable-versus-rechargeable battery debate seems ripe for a contrarian conclusion. Sure, a rechargeable can replace dozens of Duracells, but you have to keep plugging it into the power grid, which usually means burning more and more coal.

But the fact is, it takes appreciably more energy to extract metal from the earth, making alkaline batteries the clear loser. A 2007 study by Bio Intelligence Service (admittedly sponsored by French rechargeable battery maker UniRoss) asserted that wearing out a single rechargeable has 28 times less impact on global warming than using alkalines