Figure 2
From: High energy density rechargeable magnesium battery using earth-abundant and non-toxic elements
Characterization of charged and discharged Mg1–xFeSiO4 electrodes.
(a) X-ray absorption near edge structure (XANES) spectra at the Fe K-edge of Li2–xFeSiO4 during the initial charge (Li+ extraction) with a Li electrolyte. (b) XANES spectra of Mg1–xFeSiO4 during the initial discharge and (c) the initial charge using a Mg electrolyte during Mg2+ insertion and extraction, respectively. (d) O K-edge XAS spectra of Mg1–xFeSiO4 electrode during the initial Mg2+ insertion process.
