Silicon as a negative electrode material has received a lot of attention in the past few years and with good reason. On the other hand, the volume changes associated with the incorporation of large amounts lithium in silicon raise several concerns for cell design. One major issue is the pulverization of the active material. This decrepitation and continual solid electrolyte interphase growth results in rapid capacity fade. In this presentation, these challenges are explored both with a physics-base model of a cell sandwich and experimentally. Cell design and operation of Li-Si full cells are compared and contrasted with more traditional lithium ion batteries.
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