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June 2017

Scanning electron micrograph of a cathode composite of Li[Ni,Co,Mn]O2 and Li3PS4 as solid electrolyte, prepared in a bulk-type solid-state cell. After cycling, the pelletized battery cell was disassembled in an inert gas atmosphere. A nanometer-sized spherical gap was formed around the secondary particles of the active material after electrochemical treatment. NCM particles contract during de-lithiation (charge) and lose contact with the solid electrolyte. The result is a decreased capacity due to partially isolation of particles. (Picture submitted by Raimund Koerver.)

June 2017
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