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Reason Behind Li-Ion Battery Degradation Discovered

Reason Behind Li-Ion Battery Degradation Discovered
March 19, 2014 @ 10:57 EST
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Researchers at HZB say they found a reason behind lithium-ion battery degradation
Researchers at HZB say they found a reason behind lithium-ion battery degradation. (Credit: Flickr @ Aaron Yoo http://www.flickr.com/photos/thebetterday4u/)

Even the best Li-ion batteries degrade with time. A reason for this Li-ion battery degradation was now identified by researchers at the Helmholtz-Zentrum Berlin for Materials and Energy (HZB).

“Rechargeable Li-ion batteries are the power sources of choice for various portable electronics such as cellphones, laptops, cameras etc. and are gradually finding applications in automobile industries”, Dr. Jatinkumar Rana from HZB says. The young scientist and his colleagues in collaboration with the group of Prof. Martin Winter at University of Münster were interested in elucidating electrochemical processes in high-capacity Li-rich cathode materials.

The cathode material is (x)Li2MnO3*(1-x)LiMO2, where “M” is a transition metal like manganese, chromium or iron. These materials are the best candidates for the next generation of Li-ion batteries, because they deliver twice the capacity of the commercially available cathode materials and exhibit exceptionally high rate capabilities, so that they can be charged or discharged in short times or at very high currents. “Besides, they contain lesser amounts of rare, toxic elements such as nickel and cobalt, which make them cost-effective and eco-friendly”, adds Rana.
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