  A combination of experimental measurements and numerical simulations are used
to characterize the mechanical and electrochemical response of thin film
amorphous Si electrodes during cyclic lithiation. Parameters extracted from the
experiment include the variation of elastic modulus and the flow stress as
functions of Li concentration; the strain rate sensitivity; the diffusion
coefficient for Li transport in the electrode; the free energy of mixing as a
function of Li concentration in the electrode; the exchange current density for
the Lithium insertion reaction; as well as reaction rates and diffusion
coefficients characterizing the rate of formation of solid-electrolyte
interphase layer at the electrode surface. Model predictions are compared with
experimental measurements; and the implications for practical Si based
electrodes are discussed.
