![]() ![]() They also need high temperatures to work effectively, so they are neither safe nor inexpensive.īut there’s another key achievement here, The Daily Kos points out. Others have come up with very good Li+ conductors for lithium-air batteries, but they were made of molten salts that are liquid and heavy. One of the main contributions by the authors is that they developed a lightweight polymer-ceramic composite that conducts Li+ ions about 15x better at room temperature than other solid materials that have been tried up to now, says The Daily Kos. A Cheap But Effective Solid-State Electrolyte ![]() “The technology is a breakthrough and it has opened up a big window of possibility for taking these technologies to the market,” Asadi says. He says he plans to work with industry partners as he moves toward optimizing the battery design and engineering it for manufacturing. That tells us there is a lot of room for improvement because we believe we can minimize that thickness without compromising performance and that would allow us to achieve a very, very high energy density,” says Asadi. “We found that that solid state electrolyte contributes around 75 percent of the total energy density. The result allows for the critical reversible reaction that enables the battery to function - lithium dioxide formation and decomposition - to occur at high rates at room temperature, the first time this has been possible in a lithium-air battery. By combining them, Asadi found he could take advantage of ceramic’s high ionic conductivity as well as the high stability and high interfacial connection of the polymer. He chose a mix of polymer and ceramic, which are the two most common solid electrolytes, but both have drawbacks. That would represent a transformation for electric transportation, especially heavy duty vehicles such as airplanes, trains, and submarines.Īsadi started out to make a battery with a solid electrolyte, which provides safety and energy benefits compared to liquid electrolyte batteries. In a press release, IIT says the battery design Asadi and his colleagues created has the potential to store one kilowatt-hour of electricity per kilogram - four times greater than current lithium-ion battery technology. One of the 12 researchers involved in the lithium-air battery research is Mohammad Asadi, an assistant professor of chemical engineering at Illinois Institute of Technology. The four electron reaction is enabled by a mixed ion electron conducting discharge product and its interface with air. The battery is rechargeable for 1000 cycles with a low polarization gap and can operate at high rates. Lithium oxide formation involves a four electron reaction that is more difficult to achieve than the one and two electron reaction processes that result in lithium superoxide (LiO2) and lithium peroxide (Li2O2), respectively.īy using a composite polymer electrolyte based on Li10GeP2S12 nanoparticles embedded in a modified polyethylene oxide polymer matrix, we found that Li2O is the main product in a room temperature solid state lithium air battery. Here is the abstract to a report published February 2 in the journal Science (paywall).Ī lithium-air battery based on lithium oxide (Li2O) formation can theoretically deliver an energy density that is comparable to that of gasoline. Furthermore, they claim their new battery will be inexpensive to produce and safer than a conventional lithium-ion battery because it is solid-state, meaning it contains no liquids that can leak or catch fire. Researchers at the Illinois Institute of Technology, University of Illinois-Chicago, and Argonne National Labs, have succeeded in producing a practical demonstration of a lithium-air battery that achieves an energy density of 685 Wh/kg at room temperature. ![]()
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