07 April 2013

Studying Lithium Transport and Kinetics To Develop High Energy Conversion Electrodes for Li-Ion Batteries

Brookhaven National Laboratory research on conversion reactions for li-ion batteries may open up the development of high-energy conversion electrodes for lithium-ion batteries. This research was presented at a meeting of the American Chemical Society as part of the 245th National Meeting & Exposition of the American Chemical Society.

Abstract: Conversion reactions for lithium ion battery cathodes

Jason Graetz, Brookhaven National Laboratory
Phone: 631-344-3242
Email: graetz@alumni.caltech.edu

Materials that undergo a conversion reaction with lithium (e.g., metal fluorides) often accommodate more than one Li atom per transition-metal, and are promising candidates for high-capacity electrodes for lithium batteries. However, little is known about the mechanisms involved in the conversion process, the origins of the large polarization during electrochemical cycling, and why some materials are reversible (FeF2) while others are not (CuF2). A better understanding of the conversion reaction mechanism requires tracking the local phase nucleation and evolution with lithiation, which is extremely challenging due to the complexity of the reaction and presence of multiple phases within nano-scale domains. This work provides new insights into the inter- and intra-particle Li transport and kinetics of lithium conversion reactions, and may help to pave the way to develop high-energy conversion electrodes for lithium-ion batteries.


Brookhaven National Laboratory
American Chemical Society