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Special ChBE Seminar: Gao Liu
Tuesday, April 16, 2013
2:00 p.m.-3:00 p.m.
Room 2136 Chemical and Nuclear Engineering Bldg.
For More Information:
Professor Chunsheng Wang
cswang@umd.edu
Development of Conductive Binders for Si and Tin Anodes
Gao Liu
Principal Investigator
Batteries for Advanced Transportation Technologies
Lawrence Berkeley National Labs
Materials with high lithium storage capacity, such as silicon and tin based alloys, have recently been extensively studied for their potential applications as lithium-ion battery anodes. But the large-volume change associated with lithiation and delithiation severely hinders the practical employments. We report an effective solution to the volume-change by using conductive polymer binders. A class of new conductive polymers was developed through a combination of material synthesis, x-ray spectroscopy, density functional theory, and battery cell testing. Contrasting other polymer binders, the tailored electronic structure of the new polymer enables lithium doping under the operation condition of Si anode. The polymer thus maintains both electric conductivity and mechanical integrity during the battery operation. More importantly, this conductive polymer matrix is compatible with the lithium-ion slurry manufacturing process. This work implements the conceptual idea of combining binder and conductive additive into one material, solving the volume change problem of high capacity battery electrodes.
About the Speaker
Dr. Gao Liu is a Principal Investigator in the Batteries for Advanced Transportation Technologies program at Lawrence Berkeley National Laboratory (LBNL), specialized in lithium battery research. Since he joined LBNL in 2001, Dr. Liu has led energy storage research projects for the Department of Energy, and developed key technologies including conductive binders to improve battery performance. He has also collaborated with many companies to commercialize new battery technologies. He has received numerous awards including the LBNL outstanding performance award in 2005, ILMB most excellent paper award 2008, University of California discovery grant award in 2011 and BERC innovation award in 2012.
This Event is For: Graduate • Faculty • Post-Docs
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