Lithium-metal batteries—which can hold up to 10 times more charge than the lithium-ion batteries that currently power our phones, laptops and cars—haven't been commercialized because of a fatal flaw: as these batteries charge and discharge, lithium is deposited unevenly on the electrodes. This buildup cuts the lives of these batteries too short to make them viable, and more importantly, can cause the batteries to short-circuit and catch fire.
Now, researchers at the University of Illinois at Chicago have developed a solution to this problem in the form of a graphene-oxide coated 'nanosheet' that, when placed in between the two electrodes of a lithium-metal battery, prevents uneven plating of lithium and allows the battery to safely function for hundreds of charge/discharge cycles. They report their findings in the journal Advanced Functional Materials.
"Our findings demonstrate that two-dimensional materials—in this case, graphene oxide—can help regulate lithium deposition in such a way that extends the life of lithium-metal batteries," said Reza Shahbazian-Yassar, associate professor of mechanical and industrial engineering in the UIC College of Engineering and corresponding author of the paper.
Read more at: https://phys.org/news/2018-03-graphene-oxide-nanosheets-lithium-metal-batteries.html#jCp
Lithium-metal batteries—which can hold up to 10 times more charge than the lithium-ion batteries that currently power our phones, laptops and cars—haven't been commercialized because of a fatal flaw: as these batteries charge and discharge, lithium is deposited unevenly on the electrodes. This buildup cuts the lives of these batteries too short to make them viable, and more importantly, can cause the batteries to short-circuit and catch fire.
Now, researchers at the University of Illinois at Chicago have developed a solution to this problem in the form of a graphene-oxide coated 'nanosheet' that, when placed in between the two electrodes of a lithium-metal battery, prevents uneven plating of lithium and allows the battery to safely function for hundreds of charge/discharge cycles. They report their findings in the journal Advanced Functional Materials.
"Our findings demonstrate that two-dimensional materials—in this case, graphene oxide—can help regulate lithium deposition in such a way that extends the life of lithium-metal batteries," said Reza Shahbazian-Yassar, associate professor of mechanical and industrial engineering in the UIC College of Engineering and corresponding author of the paper.