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Charging and Discharging Behavior of Solvothermal LiFePO4 Cathode Material Investigated by Combined EELS/NEXAFS Study

MPS-Authors
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Schuster,  Manfred Erwin
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Teschner,  Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Girgsdies,  Frank
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Tornow,  Julian
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Willinger,  Marc Georg
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

Titirici,  M. M.
Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Schuster, M. E., Teschner, D., Popovic, J., Ohmer, N., Girgsdies, F., Tornow, J., et al. (2014). Charging and Discharging Behavior of Solvothermal LiFePO4 Cathode Material Investigated by Combined EELS/NEXAFS Study. Chemistry of Materials, 26(2), 1040-1047. doi:10.1021/cm403115t.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-D1A9-2
Abstract
LiFePO4 cathode material obtained via solvothermal
synthesis was investigated at several charging and discharging stages by a
combination of bulk (EELS) and surface sensitive (NEXAFS) methods in
order to get insight into the distribution of Li in the surface and bulk region
of the particles. Different behavior was observed as a function of the
particles morphology. The turbostratic stacking of layers in nanosized
crystals induces higher dimensional defects responsible for sluggish Li
insertion and extraction within the structure. In contrast, microstructured
crystals without higher dimensional defects do not exhibit sluggish Li
insertion/extraction, and achieve a higher degree of reversibility during
electrochemical cycling.