作者: Wilfried Sigle , Ruhul Amin , Katja Weichert , Peter A. van Aken , Joachim Maier
DOI: 10.1149/1.3131726
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摘要: There is still some controversy about the mechanisms responsible for delithiation of LiFePO 4 . We studied both large single crystals and powder by electron energy-loss spectroscopy. It shown that Li depletion leads to a change in Fe valency, an enhanced prepeak at O K edge, pronounced interband transition peak between 6 eV. Exploiting these spectral changes, process was monitored, with result crystal, takes place removal from surface-near region, whereas small particles, removed particle core.