First nonflammable lithiumion battery will stop your smartphone …

22 мая 2014 | Author: | Комментарии к записи First nonflammable lithiumion battery will stop your smartphone … отключены
Eliica (Electric Lithium-Ion Car)

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batteries, despite being one of the important pieces of modern have always had a particularly flaw: they re highly If you puncture a lithium-ion battery, or you and discharge them improperly, you ll have a pretty bad fire on hands or worse, if the conditions are right, an explosion. Most the Boeing 787 Dreamliner was grounded in due to its lithium-ion battery packs electrical fires mid-flight, but have also been a number of stories about smartphone batteries recently.

long overdue, researchers at the of North Carolina at Chapel say they ve built a nonflammable battery.

Lithium-ion batteries (LIBs) are to be incendiary and explosive for two reasons: they re pressurized, and because electrolyte the charge-carrying liquid sits between the positive and electrodes is flammable. The electrolyte in an LIB is always a lithium salt in an organic solvent, and most of solvents are highly flammable. Because of factors, LIBs are generally to a very high level of but that doesn t help you if the is somehow pierced (as in the Tesla S battery pack that was and burst into flames ), or if runaway occurs.

Now, if you mutilate an LIB or throw it in the trash, you re asking for trouble. recycle your batteries!) runaway, however, is a much problem that s inherent to LIB and which you can t do a whole lot about. in the process of charging or discharging a battery, it warms up. This is the battery chemistry in action, and is normal.

If it discharges too quickly, or you overcharge it, you can rupture one of the battery s This rupture can then down the line of cells, causing a fire or explosion. is why the peak power draw LIBs is fairly low, and why has been some discussion whether LIBs are the right for high-power applications, such as vehicles and grid power

The most common cause of LIB runaway is likely faulty circuits. The battery itself be suffering from a manufacturing too. When the cells in some cases, an LIB will swell up rather than

We still don t know what the Dreamliner battery fires, but it s just a case of Boeing peak draw, or an inherently battery design (it uses a few big cells which are prone to failure, rather than s approach, which uses of smaller cells).

The University of North Carolina s is to replace the electrolyte s flammable solvent with nonflammable perfluoropolyether PFPE is usually used as an lubricant, and the lead researcher DeSimone had originally been at using PFPE on the bottom of to prevent marine life sticking, which is a serious in the world of shipping. He realized PFPE had a similar structure to solvent used in LIBs, so he did any sensible chemist would do: dissolving a lithium salt in to see what would happen.

As luck would have it, it just fine. He created a lithium-ion battery .

DeSimone and his still need do more to see if the nonflammable electrolyte can withstand the of everyday use, but the research puts a pretty positive on things: These electrolytes not are completely nonflammable, but they exhibit unprecedented high numbers and low electrochemical polarization, of longer battery life. forward, the team will now with the arduous task of the gap between laboratory testing and mass production.

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