The Insertion Mechanism of Lithium into Mg2Si Anode Material for Li‐Ion Batteries

摘要: The reaction mechanism of lithium insertion into was studied using various analytic techniques including electrochemical measurements, X‐ray diffraction (XRD), and Auger electron spectroscopy (AES). Electrochemical tests demonstrated that 1 mol reacted with 3.9 mol Li from which the initial capacity obtained was approximately 1370 mAh/g. Ex situ XRD and AES data showed that lithium intercalated into the lattice first followed by alloying with Si and Mg. The degradation mechanism of during cycling was investigated because the …