Become a fan of Slashdot on Facebook


Forgot your password?

Crushed Silicon Triples Life of Li-Ion Batteries In the Lab 123

derekmead writes "Batteries rule everything around us, which makes breakthroughs a big deal. A research team at Rice says they have produced a nice jump: by using a crushed silicon anode in a lithium-ion battery, they claim to have nearly tripled the energy density of current li-ion designs. Engineer Sibani Lisa Biswal and research scientist Madhuri Thakur reported in Nature's Scientific Reports (it has yet to be published online) that by taking porous silicon and crushing it, they were able to dramatically decrease the volume required for anode material. Silicon has long been looked at as an anode material because it holds up to ten times more lithium ions than graphite, which is most commonly used commercially. But it's previously been difficult to create a silicon anode with enough surface area to cycle reliably. Silicon also expands when it's lithiated, making it harder to produce a dense anode material. After previously testing a porous silicon 'sponge,' the duo decided to try crushing the sponges to make them more compact. The result is a new battery design that holds a charge of 1,000 milliamp hours per gram through 600 tested charge cycles of two hours charging, two hours discharging. According to the team, current graphite anodes can only handle 350 mAh/g."

Comment Re:or just (Score 2) 1223

A religion is - imo- a way to control a mass of people by fear, and since so many people are ready to trust anything, it can only lead to mass stupidy and conflicts.

I just wish that everybody could read between the lines of all thoses books and religious statements, and just find a good way of living WHILE using their brains and think for themselves.

But I guess it's just a wish... not everyone was given a brain at birth ;)

Comment Re:Minor suggestions - Fixed! (Score 1) 1154

Here's how to fix the Linux desktop:

Make it polished and reliable.
Enforce a single GUI environment.
Have it run real productivity applications (e.g. MS Office, Adobe Photoshop, Mathworks Matlab).
Make it certified under Single Unix Specification [].
Make it support smooth trackpad gestures.
Those are just some minor suggestions.

There, fixed it for you :)

Comment Re:Five years?! (Score 1) 214

Those organs would be LOST anyway... Their not beating their wife, they save peoples by ripping of organs from those who actually killed their wife or someone else. Sound good to me. It should be "We'll stop when we'll be able to grow them in lab" instead.

We should do that here too, as long as we can't grow theses in lab for cheap.

Comment Re:Can we end the CRTC already (Score 2) 404

What canadian culture is ?

-1 Big families (this one is phasing out)
-2 Religion (this one is phasing out)
-3 Living with nature (this one is phasing out)
-4 Food stuff (bacon, "tourtiere" and special thing like thoses ) (this one is phasing out)
-5 85% english 15% french (this one is phasing out)
-6 Hockey, and it's not phasing out...
-7 Try to propagate peace and stuff like that beyond the world, which appear to be phasing out.

So you can resume the entire canadian culture with only 1 word : HOCKEY. it's sad.

Slashdot Top Deals

Everything that can be invented has been invented. -- Charles Duell, Director of U.S. Patent Office, 1899