Oh and the commies are back already. And finished nationalizing the critical mining industries several years ago.
I think you're confusing Chile with Bolivia.
Chile has one of the strongest growing economy in South America and is a capitalistic country alright.
Bolivia, on the other hand, has a socialist government and has been playing hardball with their lithium reserves.
It requires a Flourine-carrying electrolyte! Lithium is bad enuf, but Fluorine is really bad stuff.
All Li-ion batteries carry a fluorine containing electrolyte. In particular, LiPF6 is the salt used, dissolved in organic solvents. Plus a whole bunch of additives.
The ideal salt would be a perchlorate, but being explosive it's not allowed.
I have read the original publication (doi:10.1016/j.elecom.2009.08.015) and cannot understand much of the (electro-)chemistry of it. The electrode potential is strongly dependent on the doping of the silicon, which makes sense, but the I/V curve looks less than impressive. It's mostly a bad fuel cell, at the moment. Also, the chemistry of the electrolyte is not clear to me. In principle the battery should work according to dissolution of Si from the anode, transport through the electrolyte (an ionic liquid with fluorine) and reaction with oxygen at the air cathode. The researchers claim that they observe a white deposit at the cathode, and that this deposit is SiO2. Silicon-fluorine chemistry is quite complicated, IIRC, and I cannot for the life of me imagine transport of Si4+ ions in the electrolyte. Also, HF as such does not dissolve Si, but it need some strong acid to start the etching. How this phenomenon can happen in the ionic liquid is beyond me.
Also, in the introduction, the researchers claim that the battery has an "infinite shelf life", but then talk about corrosion currents in the paper. If there is corrosion (i.e. self discharge), then the shelf life is quite limited. Cherry on top, they claim that SiO2 is easily reducible to reobtain Si. I am not familiar with silicon metallurgy, but I am not sure it is easy to do it electrochemically, let alone replate Si at the anode upon recharge. On the plus side, they used metallurgical grade Si, which is dirt cheap when compared to semiconductor grade Si.
I would love for this to work, but at the moment the authors have omitted quite a bit of information. If I were the referee, I would have asked at least the questions above. Think of it, there is a corresponding author for a reason.
Disclaimer: I work in battery research, and I am hence jealous that they made it to the front page of Slashdot.
The device they came up with is more like a supercapacitor, but it still pretty good. I believe that the real breakthrough in electrochemical energy storage technology will not be in greater energy density from new materials, but in cheaper alternatives from organic systems. When their performance degrades too much we can safely toss them, make compost and start over.
The marking in Hz is most probably referred to the vibration of the cantilever (see how an AFM works), while the other unit is not Amps but Angstrom (1Å = 0.1nm). The pentacene molecule is long roughly 17Å.
This stuff is on another planet of cool.
No. In many metal-air batteries, the reaction occurs by transporting oxygen to the metal (Zn-air), but in Li-air it is the lithium ion that is transported towards the oxygen rich electrode.
The lithium anode is never directly in contact with oxygen, or air.
It does have the same "one more level and then I'll go to bed" thing that only Lemmings or Tetris had.
And it works like a charm on my AMD64 Debian machine.
Highly recommended.
Which level are we talking about? From a European point of view, 89000$ are quite some money. Is this before tax? How much would it be net at the end of the month?
I am not familiar with US salaries so please excuse the silly question.
What will happen to Qtopia?
If Nokia switches to full-linux-ahead with it, it would really be sweet, although we'd see a nice internal fight between the existing GTK stack and the new qt one:)
Slightly better since I copied the dependencies from the official iceweasel package, but I agree with you.
A package built like that should *not* be redistributed, just like those created with checkinstall.
Remember to modify the debian/DEBIAN/control file to look like it makes sense, pretty much like this
Package: firefox3 Priority: optional Section: web Maintainer: Yourname <Your@email.address> Architecture: i386 Version: 3.0+b2 Depends: debianutils (>= 1.16), fontconfig, libatk1.0-0 (>= 1.20.0), libc6 (>= 2.7-1), libcairo2 (>= 1.4.0), libfontconfig1 (>= 2.4.0), libfreetype6 (>= 2.3.5), libglib2.0-0 (>= 2.14.0), libgtk2.0-0 (>= 2.12.0), libhunspell-1.1-0 (>= 1.1.6-1), libjpeg62, libnspr4-0d (>= 1.8.0.10), libnss3-0d (>= 3.11.7), libpango1.0-0 (>= 1.18.3), libpng12-0 (>= 1.2.13-4), libstdc++6 (>= 4.2.1), libx11-6, libxft2 (>> 2.1.1), libxinerama1, libxp6, libxrender1, libxt6, procps, psmisc, zlib1g (>= 1:1.2.3.3.dfsg-1) Suggests: iceweasel-gnome-support (= 2.0.0.11-1), latex-xft-fonts, libkrb53, mozplugger, xprint Conflicts: firefox (<< 2.0+dfsg-1), mozilla-firefox (<< 1.5.dfsg-1) Description: lightweight web browser based on Mozilla Iceweasel is a redesign of the Mozilla browser component, similar to Galeon, K-Meleon and Camino, but written using the XUL user interface language and designed to be lightweight and cross-platform. . This browser is based on the Firefox source-code, with minor modifications. Historically, this browser was previously known as Firebird and Phoenix. . This package is built from the binaries downloaded here: http://releases.mozilla.org/pub/mozilla.org/firefox/releases/3.0b2/linux-i686/en-US/firefox-3.0b2.tar.bz2
While it's not like downloading a.deb and installing it, it sure is damn faster than recompiling firefox.
Oh and yes, you could just untar firefox in/opt and make a symlink in/usr/local/bin, but you wanted a.deb.
I held back in buying a new phone for a few months, now, hoping that my Christmas present would have been a new & shiny Neo from the Openmoko project. Unfortunately things took longer than expected and now Android seems to have put the last nail in the coffin.
I thought about getting a Nokia N810, but of all the neat things it does, it's not a phone!
So I guess now the question is: wait for Openmoko to put their act together, or jump on the Google bandwagon? I'd prefer Openmoko for the major openness of the whole project and for the undoubted underdog charme, but money is money, and a neat phone like the Neo won't be cheap.
Any advice/insight/alternative to these two players for a phone, possibly with touchscreen but definitely with Wifi and GPS, based on linux?
The electrical storage capacity of a Li-ion battery is limited by how much lithium can be held in the battery's anode, which is typically made of carbon.
which is plain wrong. The cathode materials have a capacity of roughly 150mAh/g, while graphite is at 370. So the real revolution would be finding a cathodic material that would deliver at least 250mAh/g.
And maybe an electrolyte that does not decompose above 4.3V, but that's another story.
Slashdot Mirror
Have you tried Abiword?
I think you're confusing Chile with Bolivia. Chile has one of the strongest growing economy in South America and is a capitalistic country alright. Bolivia, on the other hand, has a socialist government and has been playing hardball with their lithium reserves.
All Li-ion batteries carry a fluorine containing electrolyte. In particular, LiPF6 is the salt used, dissolved in organic solvents. Plus a whole bunch of additives. The ideal salt would be a perchlorate, but being explosive it's not allowed.
I have read the original publication (doi:10.1016/j.elecom.2009.08.015) and cannot understand much of the (electro-)chemistry of it.
The electrode potential is strongly dependent on the doping of the silicon, which makes sense, but the I/V curve looks less than impressive. It's mostly a bad fuel cell, at the moment.
Also, the chemistry of the electrolyte is not clear to me. In principle the battery should work according to dissolution of Si from the anode, transport through the electrolyte (an ionic liquid with fluorine) and reaction with oxygen at the air cathode. The researchers claim that they observe a white deposit at the cathode, and that this deposit is SiO2.
Silicon-fluorine chemistry is quite complicated, IIRC, and I cannot for the life of me imagine transport of Si4+ ions in the electrolyte. Also, HF as such does not dissolve Si, but it need some strong acid to start the etching. How this phenomenon can happen in the ionic liquid is beyond me.
Also, in the introduction, the researchers claim that the battery has an "infinite shelf life", but then talk about corrosion currents in the paper. If there is corrosion (i.e. self discharge), then the shelf life is quite limited.
Cherry on top, they claim that SiO2 is easily reducible to reobtain Si. I am not familiar with silicon metallurgy, but I am not sure it is easy to do it electrochemically, let alone replate Si at the anode upon recharge.
On the plus side, they used metallurgical grade Si, which is dirt cheap when compared to semiconductor grade Si.
I would love for this to work, but at the moment the authors have omitted quite a bit of information. If I were the referee, I would have asked at least the questions above. Think of it, there is a corresponding author for a reason.
Disclaimer: I work in battery research, and I am hence jealous that they made it to the front page of Slashdot.
Hmmm yes but no.
Lithium has quite the diagonal relationship with Magnesium.
Diffusion of Sodium is quite different than Lithium's.
Too soon!
The device they came up with is more like a supercapacitor, but it still pretty good.
I believe that the real breakthrough in electrochemical energy storage technology will not be in greater energy density from new materials, but in cheaper alternatives from organic systems.
When their performance degrades too much we can safely toss them, make compost and start over.
A couple of examples:
http://gcep.stanford.edu/pdfs/Y0NOS1cDbWD509Q0m5Reyw/Symposium2009Poster_Joaquin_Geng.pdf
http://www.nec.co.jp/techrep/en/r_and_d/a05/a05-no3/a262.pdf
Disclaimer: I work in battery research so I firmly believe that batteries, and not fuel cells, will save us. So don't even go there.
Rules 1 & 2, buddy.
I thought "Microsoft Cash" was a new marvellous Redmond product I hadn't heard of.
Fair enough, but if you were using it as a substrate I imagine you'd use conductive graphene sheets, and not a substrate aligned in the xy plane.
The marking in Hz is most probably referred to the vibration of the cantilever (see how an AFM works), while the other unit is not Amps but Angstrom (1Å = 0.1nm). The pentacene molecule is long roughly 17Å. This stuff is on another planet of cool.
Woooooshhhhhhhh.
No. In many metal-air batteries, the reaction occurs by transporting oxygen to the metal (Zn-air), but in Li-air it is the lithium ion that is transported towards the oxygen rich electrode. The lithium anode is never directly in contact with oxygen, or air.
It does have the same "one more level and then I'll go to bed" thing that only Lemmings or Tetris had. And it works like a charm on my AMD64 Debian machine. Highly recommended.
Will it run Openmoko?
Sorry, mod me into oblivion, I deserve it.
And there goes coffee through my nose.
Which level are we talking about? From a European point of view, 89000$ are quite some money. Is this before tax? How much would it be net at the end of the month? I am not familiar with US salaries so please excuse the silly question.
These are Summer Olympics, that game is called "Snow Day". How could it be a copy?
What will happen to Qtopia? :)
If Nokia switches to full-linux-ahead with it, it would really be sweet, although we'd see a nice internal fight between the existing GTK stack and the new qt one
There you go:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=tree;f=drivers/net/wireless;h=45adf0a95539e8a0ca5fddbb720319a9b7b39978;hb=HEAD
If you want a suggestion on what to buy, support for Intel chipsets is very good. I have a 4965 device supported by iwlwifi and it works like a charm.
Slightly better since I copied the dependencies from the official iceweasel package, but I agree with you.
A package built like that should *not* be redistributed, just like those created with checkinstall.
The best thing is that it's right on your computer, just a couple of commands away:
Remember to modify the debian/DEBIAN/control file to look like it makes sense, pretty much like this
While it's not like downloading a
Oh and yes, you could just untar firefox in
Yes they should. And then I'd be rich because I registered a similar project on sourceforge three years ago: https://sourceforge.net/projects/impressionante/
;)
Not that I ever wrote a line of code, obviously
That would be an awesome idea, anyway, especially using the data collected for the 3D cities.
I held back in buying a new phone for a few months, now, hoping that my Christmas present would have been a new & shiny Neo from the Openmoko project. Unfortunately things took longer than expected and now Android seems to have put the last nail in the coffin.
I thought about getting a Nokia N810, but of all the neat things it does, it's not a phone!
So I guess now the question is: wait for Openmoko to put their act together, or jump on the Google bandwagon? I'd prefer Openmoko for the major openness of the whole project and for the undoubted underdog charme, but money is money, and a neat phone like the Neo won't be cheap.
Any advice/insight/alternative to these two players for a phone, possibly with touchscreen but definitely with Wifi and GPS, based on linux?
which is plain wrong. The cathode materials have a capacity of roughly 150mAh/g, while graphite is at 370. So the real revolution would be finding a cathodic material that would deliver at least 250mAh/g.
And maybe an electrolyte that does not decompose above 4.3V, but that's another story.