1. Sustainable Energy Technologies Seminar

    "Rational Interfacial Design for Safer Lithium Ion Batteries"

    Presented by Dr. Zonghai Chen, Argonne National Laboratory

    Monday, June 10, 2013, 1:30 pm
    Building 815 - Conference Room 1-37

    Hosted by: Feng Wang - 631-344-4388

    Rational Interfacial Design for Safer Lithium Ion Batteries Zonghai Chen Chemical Sciences and Engineering Division, Argonne National Laboratory 9700 South Cass Avenue, Argonne, IL, 60439, USA Recently, lithium-ion batteries have been proposed as the power sources for hybrid electric vehicles (HEVs). The commercialization of lithium-ion technology for automobile applications has been slow because of its insufficient calendar life, low abuse tolerance, high cost and poor low temperature performance. Major effort has been devoted to optimizing the structure and formulation of battery components to improve their electrochemical performance. Although it is well known that side reactions between electrode materials and electrolytes play major role in the capacity/power fade of lithium ion batteries, the importance of surface chemistry on battery safety has not been studied thoroughly. It will be shown that the surface chemistry can play a crucial role in the safety of both the anode and the cathode. On the anode side, a thermally-stable, artificial, solid electrolyte interphase (SEI) layer is the key to improve the safety characteristics of the battery system. On the other hand, a safer cathode material can be achieved by designing a protection outer layer to suppress the reactions between the cathode materials and the non-aqueous electrolyte. Acknowledgment Research at Argonne National Laboratory was funded by U.S. Department of Energy, Vehicle Technologies Office. Argonne National Laboratory is operated for the U.S. Department of Energy by UChicago Argonne, LLC, under contract DE-AC02-06CH11357.