|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Interface-driven Phenomena in Solids: Thermodynamics, Kinetics and Chemistry
||Kinetics of Phase Transformation during Lithiation of Sn Electrode Materials
||Eric Chason, Chun-Hao Chen, Srivatsan Hulikal, Allan Bower, Pradeep Guduru
|On-Site Speaker (Planned)
Sn anodes are being considered for Li batteries because of their high capacity. However, incorporation of Li into the Sn results in new phase formation as well as volume expansion. To understand the evolution of the phases and the corresponding stresses, we have developed a system that enables us to simultaneously measure stress (using in situ wafer curvature) during lithiation at the same time as the charge (measured with a potentiostat). We have used this system to measure the growth kinetics of the first and second lithiated phases. The measurements enable the evolution of both the thickness and stress for each phase to be determined. The resulting growth kinetics have been analyzed in terms of a mixed interface- and diffusion-controlled model that enables us to determine parameters for the mobility of Li in each phase and the rate at which the interface grows as a function of overpotential.
||Planned: A print-only volume